AWS Question & Answers

1.Compare AWS and OpenStack

Criteria	AWS	OpenStack
License	Amazon proprietary	Open Source
Operating System	Whatever cloud administrator provides	Whatever AMIs provided by AWS
Performing repeatable operations	Through templates	Through text files

2. What is AWS?

AWS (Amazon Web Services) is a platform to provide secure cloud services, database storage, offerings to compute power, content delivery, and other services to help business level and develop.

3. What is the importance of buffer in Amazon Web Services?

An Elastic Load Balancer ensures that the incoming traffic is distributed optimally across various AWS instances.  A buffer will synchronize different components and makes the arrangement additional elastic to a burst of load or traffic. The components are prone to work in an unstable way of receiving and processing the requests. The buffer creates the equilibrium linking various apparatus and crafts them effort at the identical rate to supply more rapid services.

4. What is the way to secure data for carrying in the cloud?

One thing must be ensured that no one should seize the information in the cloud while data is moving from point one to another and also there should not be any leakage with the security key from several storerooms in the cloud. Segregation of information from additional companies’ information and then encrypting it by means of approved methods is one of the options.

5. Name the several layers of Cloud Computing.

Here is the list of layers of the cloud computing

PaaS – Platform as a Service

IaaS – Infrastructure as a Service

SaaS – Software as a Service

6. What are the components involved in Amazon Web Services?

There are 4 components involved and are as below.Amazon S3 with this, one can retrieve the key information which are occupied in creating cloud structural design and amount of produced information also can be stored in this component that is the consequence of the key specified.Amazon EC2 instance helpful to run a large distributed system on the Hadoop cluster. Automatic parallelization and job scheduling can be achieved by this component.Amazon SQS this component acts as a mediator between different controllers. Also worn for cushioning requirements those are obtained by the manager of Amazon.Amazon SimpleDB helps in storing the transitional position log and the errands executed by the consumers.

7. Distinguish between scalability and flexibility

The aptitude of any scheme to enhance the tasks on hand on its present hardware resources to grip inconsistency in command is known as scalability. The capability of a scheme to augment the tasks on hand on its present and supplementary hardware property is recognized as flexibility, hence enabling the industry to convene command devoid of putting in the infrastructure at all.  AWS has several configuration management solutions for AWS scalability, flexibility, availability and management.

8. Name the various layers of the cloud architecture

There are 5 layers and are listed below

CC- Cluster Controller

SC- Storage Controller

CLC- Cloud Controller

Walrus

NC- Node Controller

9. Define auto-scaling.

Auto- scaling is one of the remarkable features of AWS where it permits you to arrange and robotically stipulation and spin up fresh examples without the requirement for your involvement. This can be achieved by setting brinks and metrics to watch. If those entrances are overcome, a fresh example of your selection will be configured, spun up and copied into the weight planner collection.

10. Which automation gears can help with spinup services?

The API tools can be used for spinup services and also for the written scripts. Those scripts could be coded in Perl, bash or other languages of your preference. There is one more option that is patterned administration and stipulating tools such as a dummy or improved descendant. A tool called Scalr can also be used and finally we can go with a controlled explanation like a Rightscale.

11. Is it possible to scale an Amazon instance vertically? How?

Yes. This is an incredible characteristic of cloud virtualization and AWS. Spinup is a huge case when compared to the one which you are running with. Let up the instance and separate the root EBS volume from this server and remove. Next, stop your live instance, remove its root volume. Note down the distinctive device ID and attach root volume to your new server and start it again. This is the way to scaling vertically in place.

12. How the processes start, stop and terminate works? How?

Starting and stopping of an instance If an instance gets stopped or ended, the instance functions a usual power cut and then change over to a clogged position. You can establish the case afterward since all the EBS volumes of Amazon remain attached. If an instance is in stopping state, then you will not get charged for additional instance.

Finishing the instance If an instance gets terminated it tends to perform a typical blackout, so the EBS volumes which are attached will get removed except the volume’s deleteOnTermination characteristic is set to zero. In such cases, the instance will get removed and cannot set it up afterward.

13. What is the relation between an instance and AMI?

AMI can be elaborated as Amazon Machine Image, basically, a template consisting software configuration part. For example an OS, applications, application server. If you start an instance, a duplicate of the AMI in a row as an unspoken attendant in the cloud.

14. What is auto-scaling?

 Ans.Auto-scaling is a feature of AWS which allows you to configure and automatically provision and spin-up new instances without the need for your intervention.

 15. What are the different types of cloud services?

 Ans. Software as a Service (SaaS), Data as a Service (DaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS).

16. What is Amazon S3?

 Ans. Amazon S3 (Simple Storage Service) is an object storage with a simple web service interface to store and retrieve any amount of data from anywhere on the web.

 17. What is SimpleDB?

 Ans. It is a structured data store that supports indexing and data queries to both EC2 and S3.

 18. What is an AMI? 

 Ans. AMI (Amazon Machine Image) is a snapshot of the root filesystem.

 19. What is the type of architecture, where half of the workload is on the public load while at the same time half of it is on the local storage?

 Ans. Hybrid cloud architecture.

 20. Can I vertically scale an Amazon instance? How do you do it?

 Ans. Yes. Spinup a new larger instance than the one you are running, then pause that instance to detach the root ebs volume from this server and discard. After that, stop the live instance and detach its root volume. Note the unique device ID and attach that root volume to the new server, and start again. This way you will have scaled vertically.

 21. How can you send request to Amazon S3?

 Ans. You can send request by using the REST API or the AWS SDK wrapper libraries that wrap the underlying Amazon S3 REST API.

 22. How many buckets can be create in AWS by default?

 Ans. By default, 100 buckets can be created.

 23. Should encryption be used for S3?

 Ans. Encryption should be considered for sensitive data as S3 is a proprietary technology.

 23. What are the various AMI design options?

 Ans. Fully Baked AMI, JeOS (just enough operating system) AMI, and Hybrid AMI.

 24. What is Geo Restriction in CloudFront?

 Ans. Geo restriction, also known as geoblocking, is used to prevent users in specific geographic locations from accessing content that you’re distributing through a CloudFront web distribution.

 25. Explain what is T2 instances?

 Ans. T2 instances are designed to provide moderate baseline performance and the capability to burst to higher performance as required by workload.

 26. What is AWS Lambda?

 Ans. AWS Lambda is a compute service that lets you run code in the AWS Cloud without provisioning or managing servers.

27. What is a Serverless application in AWS?

Ans. The AWS Serverless Application Model (AWS SAM) extends AWS CloudFormation to provide a simplified way of defining the Amazon API Gateway APIs, AWS Lambda functions, and Amazon DynamoDB tables needed by your serverless application.

28. What is the use of Amazon ElastiCache?

Ans. Amazon ElastiCache is a web service that makes it easy to deploy, operate, and scale an in-memory data store or cache in the cloud.

29. Explain how the buffer is used in Amazon web services?

Ans. The buffer is used to make the system more robust to manage traffic or load by synchronizing different component.

30. Differentiate between stopping and terminating an instance

Ans. When an instance is stopped, the instance performs a normal shutdown and then transitions to a stopped state.

When an instance is terminated, the instance performs a normal shutdown, then the attached Amazon EBS volumes are deleted unless the volume’s deleteOnTermination attribute is set to false.

31. Is it possible to change the private IP addresses of an EC2 while it is running/stopped in a VPC?

Ans. The primary private IP address cannot be changed. Secondary private addresses can be unassigned, assigned or moved between interfaces or instances at any point.

32.Mention What Are The Key Components Of Aws?

 The key components of AWS are

Route 53 A DNS web service

Simple E-mail Service It allows sending e-mail using RESTFUL API call or via regular SMTP

Identity and Access Management It provides enhanced security and identity management for your AWS account

Simple Storage Device or (S3) It is a storage device and the most widely used AWS service

Elastic Compute Cloud (EC2) It provides on-demand computing resources for hosting applications. It is very useful in case of unpredictable workloads

Elastic Block Store (EBS) It provides persistent storage volumes that attach to EC2 to allow you to persist data past the lifespan of a single EC2

CloudWatch To monitor AWS resources, It allows administrators to view and collect key Also, one can set a notification alarm in case of trouble.

34.Explain What Is S3?

 S3 stands for Simple Storage Service. You can use S3 interface to store and retrieve any amount of data, at any time and from anywhere on the web.  For S3, the payment model is “pay as you go”.

35.Explain What Is Ami?

 AMI stands for Amazon Machine Image.  It’s a template that provides the information (an operating system, an application server and applications) required to launch an instance, which is a copy of the AMI running as a virtual server in the cloud.  You can launch instances from as many different AMIs as you need.

36.Mention What Is The Relation Between An Instance And Ami?

 From a single AMI, you can launch multiple types of instances.  An instance type defines the hardware of the host computer used for your instance.Each instance type provides different compute and memory capabilities. Once you launch an instance, it looks like a traditional host, and we can interact with it as we would with any computer.

37.What Does An Ami Include?

 An AMI includes the following things

A template for the root volume for the instance

Launch permissions decide which AWS accounts can avail the AMI to launch instances

A block device mapping that determines the volumes to attach to the instance when it is launched.

38.How Can You Send Request To Amazon S3?

 Amazon S3 is a REST service, you can send request by using the REST API or the AWS SDK wrapper libraries that wrap the underlying Amazon S3 REST API.

39.Mention What Is The Difference Between Amazon S3 And Ec2?

 The difference between EC2 and Amazon S3 is that

EC2

It is a cloud web service used for hosting your application

It is like a huge computer machine which can run either Linux or Windows and can handle application like PHP, Python, Apache or any databases.

S3

It is a data storage system where any amount of data can be stored

It has a REST interface and uses secure HMAC-SHA1 authentication keys.

40.How Many Buckets Can You Create In Aws By Default?

 By default, you can create upto 100 buckets in each of your AWS accounts.

41Explain Can You Vertically Scale An Amazon Instance? How?

 Yes, you can vertically scale on Amazon instance. For that

Spin up a new larger instance than the one you are currently running

Pause that instance and detach the root webs volume from the server and discard

Then stop your live instance and detach its root volume

Note the unique device ID and attach that root volume to your new server

And start it again

42.Explain What Is T2 Instances?

 T2 instances are designed to provide moderate baseline performance and the capability to burst to higher performance as required by workload.

43.In Vpc With Private And Public Subnets, Database Servers Should Ideally Be Launched Into Which Subnet?

 With private and public subnets in VPC, database servers should ideally launch into private subnets.

44.Mention What Are The Security Best Practices For Amazon Ec2?

 For secure Amazon EC2 best practices, follow the following steps

Use AWS identity and access management to control access to your AWS resources

Restrict access by allowing only trusted hosts or networks to access ports on your instance

Review the rules in your security groups regularly

Only open up permissions that your require

Disable password-based login, for instance, launched from your AMI.

45.Explain How The Buffer Is Used In Amazon Web Services?

The buffer is used to make the system more robust to manage traffic or load by synchronizing different component.  Usually, components receive and process the requests in an unbalanced way, With the help of buffer, the components will be balanced and will work at the same speed to provide faster services.

46.While Connecting To Your Instance What Are The Possible Connection Issues One Might Face?

 The possible connection errors one might encounter while connecting instances are

Connection timed out

User key not recognized by the server

Host key not found, permission denied

Unprotected private key file

Server refused our key or No supported authentication method available

Error using MindTerm on Safari Browser

Error using Mac OS X RDP Client

47.What Is Amazon Ec2 Service?

 Amazon Elastic Compute Cloud (Amazon EC2) is a web service that provides resizable (scalable) computing capacity in the cloud. You can use Amazon EC2 to launch as many virtual servers you need. In Amazon EC2 you can configure security and networking as well as manage storage.Amazon EC2 service also helps in obtaining and configuring capacity using minimal friction.

48.What Are The Features Of The Amazon Ec2 Service?

 As the Amazon EC2 service is a cloud service so it has all the cloud features. Amazon EC2 provides the following features

Virtual computing environment (known as instances)

Pre-configured templates for your instances (known as Amazon Machine Images – AMIs)

Amazon Machine Images (AMIs) is a complete package that you need for your server (including the operating system and additional software)

Amazon EC2 provides various configurations of CPU, memory, storage and networking capacity for your instances (known as instance type)

Secure login information for your instances using key pairs (AWS stores the public key and you can store the private key in a secure place)

Storage volumes of temporary data is deleted when you stop or terminate your instance (known as instance store volumes)

Amazon EC2 provides persistent storage volumes (using Amazon Elastic Block Store – EBS)

A firewall that enables you to specify the protocols, ports, and source IP ranges that can reach your instances using security groups

Static IP addresses for dynamic cloud computing (known as Elastic IP address)

Amazon EC2 provides metadata (known as tags)

Amazon EC2 provides virtual networks that are logically isolated from the rest of the AWS cloud, and that you can optionally connect to your own network (known as virtual private clouds – VPCs)

49.What Is Amazon Machine Image And What Is The Relation Between Instance And Ami?

 Amazon Web Services provides several ways to access Amazon EC2, like web-based interface, AWS Command Line Interface (CLI) and Amazon Tools for Windows Powershell. First, you need to sign up for an AWS account and you can access Amazon EC2.

Amazon EC2 provides a Query API. These requests are HTTP or HTTPS requests that use the HTTP verbs GET or POST and a Query parameter named Action.

50.What Is Amazon Machine Image (ami)?

 An Amazon Machine Image (AMI) is a template that contains a software configuration (for example, an operating system, an application server, and applications). From an AMI, we launch an instance, which is a copy of the AMI running as a virtual server in the cloud. We can even launch multiple instances of an AMI.

51.What Is The Relation Between Instance And Ami?

 We can launch different types of instances from a single AMI. An instance type essentially determines the hardware of the host computer used for your instance. Each instance type offers different compute and memory capabilities.

After we launch an instance, it looks like a traditional host, and we can interact with it as we would do with any computer. We have complete control of our instances; we can use sudo to run commands that require root privileges.

52.Explain Storage For Amazon Ec2 Instance.?

Amazon EC2 provides many data storage options for your instances. Each option has a unique combination of performance and durability. These storages can be used independently or in combination to suit your requirements.

There are mainly four types of storages provided by AWS

Amazon EBS Its durable, block-level storage volumes  can attached in running Amazon EC2 instance. The Amazon EBS volume persists independently from the running life of an Amazon EC2 instance. After an EBS volume is attached to an instance, you can use it like any other physical hard drive. Amazon EBS encryption feature supports encryption feature.

Amazon EC2 Instance Store Storage disk that is attached to the host computer is referred to as instance store. The instance storage provides temporary block-level storage for Amazon EC2 instances. The data on an instance store volume persists only during the life of the associated Amazon EC2 instance; if you stop or terminate an instance, any data on instance store volumes is lost.

Amazon S3 Amazon S3 provides access to reliable and inexpensive data storage infrastructure. It is designed to make web-scale computing easier by enabling you to store and retrieve any amount of data, at any time, from within Amazon EC2 or anywhere on the web.

Adding Storage Every time you launch an instance from an AMI, a root storage device is created for that instance. The root storage device contains all the information necessary to boot the instance. You can specify storage volumes in addition to the root device volume when you create an AMI or launch an instance using block device mapping.

53.What Are The Security Best Practices For Amazon Ec2?

 There are several best practices for secure Amazon EC2. Following are few of them.

Use AWS Identity and Access Management (AM) to control access to your AWS resources.

Restrict access by only allowing trusted hosts or networks to access ports on your instance.

Review the rules in your security groups regularly, and ensure that you apply the principle of least

Privilege — only open up permissions that you require.

Disable password-based logins for instances launched from your AMI. Passwords can be found or cracked, and are a security risk.

54.Explain Stopping, Starting, And Terminating An Amazon Ec2 Instance?

 Stopping and Starting an instance When an instance is stopped, the instance performs a normal shutdown and then transitions to a stopped state. All of its Amazon EBS volumes remain attached, and you can start the instance again at a later time. You are not charged for additional instance hours while the instance is in a stopped state.

Terminating an instance When an instance is terminated, the instance performs a normal shutdown, then the attached Amazon EBS volumes are deleted unless the volume’s deleteOnTermination attribute is set to false. The instance itself is also deleted, and you can’t start the instance again at a later time.

55.Explain Elastic Block Storage? What Type Of Performance Can You Expect? How Do You Back It Up? How Do You Improve Performance?

 EBS is a virtualized SAN or storage area network.  That means it is RAID storage to start with, so it’s redundant and fault tolerant.  If disks die in that RAID you don’t lose data.  Great! It is also virtualized, so you can provision and allocate storage, and attach it to your server with various API calls. No calling the storage expert and asking him or her to run specialized commands from the hardware vendor.

Performance on EBS can exhibit variability.  That is, it can go above the SLA performance level, then drop below it.  The SLA provides you with an average disk I/O rate you can expect. This can frustrate some folks, especially performance experts who expect reliable and consistent disk throughout on a server.  Traditional physically hosted servers behave that way. Virtual AWS instances do not.

Backup EBS volumes by using the snapshot facility via API call or via a GUI interface like elasticfox.

Improve performance by using Linux software raid and striping across four volumes.

56.What Is S3? What Is It Used For? Should Encryption Be Used?

 S3 stands for Simple Storage Service.  You can think of it like FTP storage, where you can move files to and from there, but not mount it like a filesystem.  AWS automatically puts your snapshots there, as well as AMIs there.  Encryption should be considered for sensitive data, as S3 is a proprietary technology developed by Amazon themselves, and as yet unproven vis-a-vis a security standpoint.

57.What Is An Ami? How Do I Build One?

 AMI stands for Amazon Machine Image. It is effectively a snapshot of the root filesystem. Commodity hardware, servers have a bios that points the master boot record of the first block on a disk. A disk image, though can sit anywhere physically on a disk, so Linux can boot from an arbitrary location on the EBS storage network.

Build a new AMI by first spinning up and instance from a trusted AMI.Then adding packages and components as required. Be wary of putting sensitive data onto an AMI.  For instance, your access credentials should be added to an instance after spinup with a database, mount an outside volume that holds your MySQL data after spinup as well.

58.Can I Vertically Scale An Amazon Instance? How?

Yes.This is an incredible feature of AWS and cloud virtualization.  Spin up a new larger instance than the one you are currently running.  Pause that instance and detach the root ebs volume from this server and discard.  Then stop your live instance, detach its root volume.  Note down the unique device ID and attach that root volume to your new server. And then start it again.  Voila, you have scaled vertically in-place!!

59.What Is Auto-scaling? How Does It Work?

Autoscaling is a feature of AWS which allows you to configure and automatically provision and spin up new instances without the need for your intervention.  

You do this by setting thresholds and metrics to monitor.  When those thresholds are crossed, a new instance of your choosing will be spun up, configured, and rolled into the load balancer pool. Voila, you’ve scaled horizontally without any operator intervention!

60.What Automation Tools Can I Use To Spin Up Servers?

The most obvious way is to roll-your-own scripts, and use the AWS API tools.  Such scripts could be written in bash, Perl or another language or your choice.

The next option is to use a configuration management and provisioning tools like puppet or better it’s successor Opscode Chef.You might also look towards a tool like Scalr. Lastly, you can go with a managed solution such as Rightscale.

61.What Is Configuration Management? Why Would I Want To Use It With Cloud Provisioning Of Resources?

Configuration management has been around for a long time in web operations and systems administration.  Yet the cultural popularity of it has been limited.  Most systems administrators configure machines as software was developed before version control – that is manually making changes on servers.  Each server can then and usually is slightly different.  Troubleshooting though, is straightforward as you login to the box and operate on it directly.  Configuration management brings a large automation tool in the picture, managing servers like strings of a puppet.  This forces standardization, best practices, and reproducibility as all configs are versioned and managed.  It also introduces a new way of working which is the biggest hurdle to its adoption.

Enter the cloud, then configuration management becomes even more critical.That’s because virtual servers such as amazons EC2 instances are much less reliable than physical ones.You absolutely need a mechanism to rebuild them as-is at any moment.This pushes best practices like automation, reproducibility and disaster recovery into center stage.

62.Explain How You Would Simulate Perimeter Security Using The Amazon Web Services Model?

Traditional perimeter security that we’re already familiar with using firewalls and so forth is not supported in the Amazon EC2 world.  AWS supports security groups.One can create a security group for a jump box with ssh access – only port 22 open.From there a webserver group and database group are created.The webserver group allows 80 and 443 from the world, but port 22 *only* from the jump box group.Further the database group allows port 3306 from the webserver group and port 22 from the jump box group.Add any machines to the webserver group and they can all hit the database.  No one from the world can, and no one can directly ssh to any of your boxe.

63.How To Use Amazon Sqs?

Amazon SQS (Simple Queue Service) is a message passing mechanism that is used for communication between different connectors that are connected with each other. It also acts as a communicator between various components of Amazon. It keeps all the different functional components together. This functionality helps different components to be loosely coupled, and provide an architecture that is more failure resilient system.

64.What Are The Different Components Used In Aws?

The components that are used in AWS are

Amazon S3

Amazon SQS

Amazon SimpleDB

Amazon EC2

65.Tell Me How To Use Amazon Sqs?

Amazon SQS is a message passing mechanism that is used for communication between different connectors that are connected with each other. It also acts as a communicator between various components of Amazon. It keeps all the different functional components together. This functionality helps different components to be loosely coupled, and provide an architecture that is more failure resilient system.

66.What Is Standard Instances?

It provides small instances, large instances, extra large instances that give various configuration options from low range to very high range like Computing power unit, memory, processor, etc.

66.What Are Cluster Compute Instances?

The cluster compute instances consist of the high CPU with network performance and are suited with high end applications. It provides network bound application and provide extra large computing resources like 23 GB memory, 33.5 EC2 compute units. It provide general purpose graphics unit to allow user with high end configuration. It also provide highly parallelized processing application that user can use and modify the server accordingly.

67.What Are The Provisions Provided By Amazon Virtual Private Cloud?

 Amazon private cloud provides a provision to create a private and isolated networking infrastructure to give easily the Amazon web services. - Virtual network topologies define the traditional data-center approach to control and mange the files from one place. 

It provides complete control over IP address range, creation of sub-nets and configuring the network gateways and route tables. 

It provides easy to customize network configuration like creation of public sub-net to access the Internet easily. 

It allow to create multiple security layers and provide network control list by which you can control the access to Amazon EC2 instances.

68.Can You Please Explain The Difference Between Demand And Reserved Instances?

 On demand instance allow user to pay for the computing capacity according to their use every hour, whereas reserved instances provide user to pay for every instance which they use and they want to reserve. 

On demand instance provide user a free working environment in which there is no need for too much of planning related to complexities, whereas reserved instances provide user with discounts on the hourly charge of an instance and provide a easy way to manage the instances as well. 

On demand instance provide maintenance of hardware and transforms fixed cost into much smaller variable costs, whereas reserved instance provide easy way to balance the pay package.

69.What Is The Use Of Multi-threaded Fetching In Amazon S3?
 Multi-threading fetching in Amazon S3 is used to fetch the objects concurrently using the multiple threads and map the task so that fetching can be made simpler. 

It is not a good practice to increase the threading for a particular object as every node on the server has some bandwidth constraints. 

It provides user the ease with which they can upload the files and upload the threads in parallel. 

It provides high speed of data transfer and easy maintenance of the sever as well.

70.How To Upload Files In Amazon S3 In Cloud Computing?

 Amazon S3 provides uploading of large files and retrieve small offsets for end-to-end transfer data rates. The large file gets stored into small files that are smaller in size. Amazon S3 stores multiple of files together in a bundle or in a compressed form for example in .gzip or .gz format and then convert them into Amazon S3 objects. The files get uploaded on the Amazon server by the use of FTP or another protocol and then retrieved through the HTTP GET request. The request includes the defined parameters like URL, offset (byte-range) and size (length).

71.Tell Me How To Use Simpledb With Amazon?

 Every architecture rely on a database that is easy to maintain and gets easily configured Amazon uses the database by the name SimpleDB. This is the database that is used for cloud architecture to track the statuses of the components. The component of the system are asynchronous and discrete, it requires capturing the state of the system so that in any failure the user can easily revert back to its normal configuration. SimpleDB is schema-less database and there is no need to define the structure before the creation of any data. Every controller in the database defines their own structure and link the data to a job.

72.Tell Me How Buffer Is Used In Amazon Web Services?

 Buffer is used to make the system more resilient to burst of traffic or load by synchronizing different component. The components always receive and process the requests in unbalanced way. Buffer keeps the balance between different components and makes them work at the same speed to provide faster services.

73.What Is High Memory Instances?

 It provides large memory sizes for high end application and it includes memory caching applications as well.

74.What Is Micro Instances?

 It provides small consistent resources like CPU, memory and computing unit. It provides the resources to the applications that consume less amount of computing unit.

75.What Is The Function Of Amazon Elastic Compute Cloud?

 Amazon Elastic compute cloud is also known as Amazon EC2 is an Amazon web service that provides scalable resources and makes the computing easier for developers. The main functions of Amazon EC2 are 

It provides easy configurable options and allow user to configure the capacity. 

It provides the complete control of computing resources and let the user run the computing environment according to his requirements. 

It provides a fast way to run the instances and quickly book the system hence reducing the overall time. 

It provides scalability to the resources and changes its environment according to the requirement of the user. 

It provides varieties of tools to the developers to build failure resilient applications.

76.What Is The Function Of A Amazon Controller?

 The functions that are involved with an Amazon controller are 

Controllers are used to control the flow in which the messages between the other system components has to be passed. 

It controls the overall structure of the Amazon and all to retrieve the message, process the message, execute a function and store the message in other queue that are completely isolated from other controllers. 

It manages and monitors the messages passed between the systems.

77.What Is Amazon Ec2 In Cloud Computing?

 It is used to run a large distributed processing on the Hadoop cluster. It provides automatic parallelization and job scheduling.

78.What Is Amazon Simpledb In Cloud Computing?

 It is used to store intermediate status log and the tasks that are performed by the user.

79.What Is Amazon Sqs In Cloud Computing?

 It is used for buffering requests that is received by the controller of the Amazon. It is the component that is used for communication between different controllers.

80.What Is Amazon S3 In Cloud Computing?

 it is used to retrieve input data sets that are involved in making a cloud architecture and also used to store the output data sets that is the result of the input.

81.Explain What Are The Provisions Provided By Amazon Virtual Private Cloud?

 Amazon private cloud provides a provision to create a private and isolated networking infrastructure to give easily the Amazon web services.

Virtual network topologies define the traditional data-center approach to control and mange the files from one place.

It provides complete control over IP address range, creation of sub-nets and configuring the network gateways and route tables.

It provides easy to customize network configuration like creation of public sub-net to access the Internet easily.

It allow to create multiple security layers and provide network control list by which you can control the access to Amazon EC2 instances.

82.Can You Please Explain The Difference Between On Demand And Reserved Instances?

 On demand instance allow user to pay for the computing capacity according to their use every hour, whereas reserved instances provide user to pay for every instance which they use and they want to reserve.

On demand instance provide user a free working environment in which there is no need for too much of planning related to complexities, whereas reserved instances provide user with discounts on the hourly charge of an instance and provide a easy way to manage the instances as well.

On demand instance provide maintenance of hardware and transforms fixed cost into much smaller variable costs, whereas reserved instance provide easy way to balance the pay package.

83.Do You Know What Are Cluster Compute Instances?

 The cluster compute instances consist of the high CPU with network performance and are suited with high end applications. It provides network bound application and provide extra large computing resources like 23 GB memory, 33.5 EC2 compute units. It provide general purpose graphics unit to allow user with high end configuration. It also provide highly parallelized processing application that user can use and modify the server accordingly.

84.Explain What Are The Different Types Of Instances Used In Amazon Ec2?

 The instances that can be used in Amazon EC2 are

Standard instances it provides small instances, large instances, extra large instances that give various configuration options from low range to very high range like Computing power unit, memory, processor, etc.

Micro Instances It provides small consistent resources like CPU, memory and computing unit. It provides the resources to the applications that consume less amount of computing unit.

High memory instances It provides large memory sizes for high end application and it includes memory caching applications as well.

85.Explain What Is The Function Of Amazon Elastic Compute Cloud?

 Amazon Elastic compute cloud is also known as Amazon EC2 is an Amazon web service that provides scalable resources and makes the computing easier for developers. The main functions of Amazon EC2 are

It provides easy configurable options and allow user to configure the capacity.

It provides the complete control of computing resources and let the user run the computing environment according to his requirements.

It provides a fast way to run the instances and quickly book the system hence reducing the overall time.

It provides scalability to the resources and changes its environment according to the requirement of the user.

It provides varieties of tools to the developers to build failure resilient applications.

86.Tell Me What Is The Function Of A Amazon Controller?

 The functions that are involved with an Amazon controller are

Controllers are used to control the flow in which the messages between the other system components has to be passed.

It controls the overall structure of the Amazon and all to retrieve the message, process the message, execute a function and store the message in other queue that are completely isolated from other controllers.

It manages and monitors the messages passed between the systems.

89.What Is The Need Of The Feature Isolation In Amazon Web Services?

 Isolation provides a way to hide the architecture and gives an easy and convenient way to the user to use the services without any difficulty. When a message is passed between two controllers then a queue is maintained to keep the message. No controller calls any other controller directly. The communication takes place between the controllers by storing their messages in a queue. It is a service that provides a uniform way to transfer the messages between different application components. This way all the controllers are kept isolated from each other.

90.How Buffer Is Used In Amazon Web Services?

 Buffer is used to make the system more resilient to burst of traffic or load by synchronizing different component. The components always receive and process the requests in unbalanced way. Buffer keeps the balance between different components and makes them work at the same speed to provide faster services.

91.How To Use Amazon Sqs?

 Amazon SQS is a message passing mechanism that is used for communication between different connectors that are connected with each other. It also acts as a communicator between various components of Amazon. It keeps all the different functional components together. This functionality helps different components to be loosely coupled, and provide an architecture that is more failure resilient system.

92.What Are The Uses Of Amazon Web Services?

 Amazon web services consist of a component called as Amazon S3 that acts as a input as well used as an output data store. It is used in checking the input and according to that gives the output. The input consists of the web that is stored on Amazon S3 as object and it is update frequently to make the changes in the whole architecture. It is required due to the on demand growing of the data set and to provide persistent storage.

93.What Is The Different Components Used In Aws?

 The components that are used in AWS are

Amazon S3 it is used to retrieve input data sets that are involved in making a cloud architecture and also used to store the output data sets that is the result of the input.

Amazon SQS it is used for buffering requests that is received by the controller of the Amazon. It is the component that is used for communication between different controllers.

Amazon SimpleDB it is used to store intermediate status log and the tasks that are performed by the user/

Amazon EC2 it is used to run a large distributed processing on the Hadoop cluster. It provides automatic parallelization and job scheduling.

94.Explain What Is The Use Of Multi-threaded Fetching In Amazon S3?

 Multi-threading fetching in Amazon S3 is used to fetch the objects concurrently using the multiple threads and map the task so that fetching can be made simpler.

It is not a good practice to increase the threading for a particular object as every node on the server has some bandwidth constraints.

It provides user the ease with which they can upload the files and upload the threads in parallel.

It provides high speed of data transfer and easy maintenance of the sever as well.

95.How To Upload Files In Amazon S3?

 Amazon S3 provides uploading of large files and retrieve small offsets for end-to-end transfer data rates. The large file gets stored into small files that are smaller in size. Amazon S3 stores multiple of files together in a bundle or in a compressed form for example in .gzip or .gz format and then convert them into Amazon S3 objects. The files get uploaded on the Amazon server by the use of FTP or another protocol and then retrieved through the HTTP GET request. The request includes the defined parameters like URL, offset (byte-range) and size (length).

96.How Does Component Services Used For Amazon Simpledb?

 Component services allow the controllers to independently store the states of the virtual machines and the database that is in use. It creates asynchronous highly available services. It stores active requests according to the unique ID that are associated with each system. It stores the status of the entire database that is having different states for different components in a log database file.


97.How To Use Simpledb With Amazon?

 Every architecture rely on a database that is easy to maintain and gets easily configured Amazon uses the database by the name SimpleDB. This is the database that is used for cloud architecture to track the statuses of the components. The component of the system are asynchronous and discrete, it requires capturing the state of the system so that in any failure the user can easily revert back to its normal configuration. SimpleDB is schema-less database and there is no need to define the structure before the creation of any data. Every controller in the database defines their own structure and link the data to a job.