AWS Interview Questions and Answers

1. What is AWS?

Answer:  AWS  nothing but service which is provided by Amazon and which stands for Amazon Web Services. Amazon web services is a platform in which we can use a number of on-demand resources for storage, networking, database and for hosting website over the internet.AWS is on-demand service means we need to pay as per our usage.

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2. What are the components of Amazon Web Service?

Answer: Vpc-virtual  Private cloud, EC2-Elastic compute Cloud, Storage S3-Simple Storage Service, Route53, EBS-Elastic Block Storage, key-pair, Cloudwatch are the few components of AWS.

3.what is keypais concept?

Answer: For secure login information we need keypairs for instances that are nothing but virtual machines.In Keypairs we have two keys private key and public key with which we can take access of instances/virtual machines.

4.what is s3?

Answer: S3 is simple storage service .S3 provides service with the help of this we can store data at anywhere at any time in this world. In  S3 we need to pay as per usage.

5. Enlist the pricing model for EC2 Instance?

Answer :
1.On-Demand
2.Reserved
3.Spot
4.Scheduled
5.Dedicated

6. What are EC2 volume types in Instances?

Answer: Two types of Instance Volume
1.EBS-Elastic Block storage
2.Instance Store Volume

7. What is EBS(Elastic Block Storage)?

Answer: EBs stands for elastic Block Storage. We can attach volumes to the instances. In EBS Volume our data will be there even after the instance is stopped. Otherwise, In Instance volume, our data deleted when you stop the instance.

8. Enlist the types of Instances?

Answer: Following are types
1.General Purpose
2.Compute Optimized
3.Storage Optimized
4.Memory-Optimized
5.Accelerated Computing

9. What is Auto-Scaling? Enlist the components?

Answer: Auto Scaling automatically scale-up and scale-down the instances as per the required cpu utilization or memory utilization.
Auto-scaling consist of 2 components
1.Auto-Scaling Group
2.Launch configuration

10. What is AMI?
Answer: AMI stands for Amazon Machine Image. AMI  is a template which contains software configuration, Launch Permissions, Block device which is mapped with specific volume to attach to the instance.

11. What is elastic IP address?

Answer: EIP that is Elastic Ip address. It is for dynamic cloud computing.  Whenever we required Static Ip address for our machines, when we stop and restart your machine, we will be using EIP.

12. What is CloudWatch?

Answer:  CloudWatch is the monitoring tool that we can use to monitor AWS resources.For eg. Network, Application, Health Check.

13. What are the minimum and maximum size of the object that we can store in S3?

Answer: the minimum and maximum size of an object that we can store in S3 are 0 bytes is in minimum and for maximum bytes that you can store for the individual object is 5TB.

14. What are the different storage classes in s3 Storage?

Answer: Following are types of storage classes in S3 Storage

1. Standard frequently accessed

1. Standard infrequently accessed
2. One-zone infrequently accessed.
3. Glacier
4. Reduced Redundancy Storage(RRS)

15. What is Glacier?

Answer: Glacier is backup or Archival tool that we can use to take a backup of data.

16. How can we secure access to our S3 bucket?

Answer: There are two options with which we can secure the S3 Bucket
1.ACL(Access control List)

2.Bucket Policies

17. How can we Encrypt data in Simple Storage Service?

Answer: we can encrypt data by using the following data
1.Server-Side Encryption –s3(AES-256)

2.Server-Side Encryption –KMS (Key management service)

3. Server-Side Encryption –C(Client-Side)

18.what are Parameters for pricing in S3 storage?

Answer: Price model for s3 is as below

1. Storage used

2.Number of requests

3.Storage Management

4.Data Transfer

5.Transfer Acceleration

19. What is pre-requisite to work with cross-region replication in s3?

Answer: we need to enable versioning on both of the locations.in the source as well as in destination location. We need to make sure about one more important thing that is while replication our region must be different.

20. What are the roles?

Answer: Roles are used to providing permissions to users that you can trust within our AWS account. Roles are users in a different account. Roles are similar to users but with roles, you don’t need to create username and password to work with resources.

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21. What are policies and what are types of Policies?

Answer: Polices are permissions that we can attach to the user that we have created. Policies will

Contain that access that we have provided to the users that we have created. There are 2 types of policies:

1. Managed Policies
2. Inline Policies

22. What is Cloud Front?

Answer: CloudFront is a service that provides business and application developers an easy and efficient way to distribute their content with low latency and high data transfer speeds.CloudFront is a content delivery network in aws.

23. What are the edge Locations?

Answer: Edge location is a place where contents are cached .when a user trying to access content, the content searched in the edge location.If it is not available then the content made available from the original location and a copy will be stored in the edge location.

24. What are the database types in RDS?

Answer: Following are types of RDs
1.Aurora
2.Oracle
3.MYSQL Server
4.Postgresql
5.MariaDB
6.SQL Server

25.what is redshift?

Answer: AWS Redshift is a data warehouse product. It is a powerful and fast and fully managed, with a scale of petabyte data warehouse service in the cloud.

26.what is SNS(Simple Notification Service)?

Answer: SNS is a simple notification service. Simple notification service is web service that makes it easy for notifications from cloud .you can set up SNS to receive an email notification or message notification.

27.what are types of routing policies in route53?

Answer: Following are types of routing policies in route53.

1.Simple routing

2.latency routing

3.Failover routing

4.geolocation routing

5.weighted routing

6.multivalue answer

28. What is the maximum size of the message in SQS?

Answer: The maximum size of messages in SQS is 256KB.

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29. What are the types of Queues in SQS?

Answer: There are 2 types of queues in SQS.

1.Standard Queue

2.First in First out(FIFO)

30.what are the type of Load Balancer in EC2?

Answer: There are 3 types of Load Balancer.

1.Application Load Balancer

2.Network Load Balancer

3.Classic Load Balancer

31. what is ELB(Elastic Load Balancer)?

Answer: ELB is Elastic Load Balancing.ELB automatically distributes incoming application traffic and network traffic across multiple targets kind of IP addresses, EC2, Container.

32.what are two types of access that you can provide when you are creating users?

Answer: we have 2 types of access for creating users.

1.Programmatic access

2.Console access

33.what are the advantages of AutoScaling?

Answer: Following are the advantages of Autoscaling

1. We can get better fault tolerance

2.we can get better availability

3.we can get better cost management

34.what is AMI concept?

Answer: AMI is an Amazon machine image which is customized the machine. we have shared AMI’s that are created for customize use.

35.what is the difference between the Application load balancer and classic load balancer?

Answer: In Application Load balancer we can map ports dynamic, multiple ports multiple listeners are there. In classic load balancers, one port listeners are achieved.

36. How many Ip addresses are reserved in One subnet in AWS?

Answer: In  Amazon web services we have 5 different IP addresses which are reserved.

1. NID(Network ID)
2. BID(Broadcast ID)
3. DNS
4. Default Gateway
5. Amazon reserve one IP address for their use

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37. What is the Subnet concept in Amazon web services?

Answer: Subnet is nothing but the logical division of one network in small size subnet.

38. How can we convert the Private subnet to public subnet?

Answer: we need to remove IGW that is internet gateway and we need to add NAT gateway .we need to manually associate subnet in private routing table.

39.can we reduce the size of EBS(Elastic Block Storage)?

Answer: we can not reduce the size of Elastic Block Storage. If we want we can increase the size as per our requirement.

40. What is Elastic Ip address Concept? Is it charged?

Answer: Elastic IP addresses are used to connect the instance to the internet . We need to charge for the Elastic Ip addresses if these IP addresses are not connected to instances.

41. What is the use of tag and how we can use these tags?

Answer: Tags we can use for identification and we can use in for grouping in different resources in  AWS.

42. balancer and DNS service both come under which type of technology?

Answer: Load balancer, as well as DNS server both, comes under IAAS.

IAAS stands for infrastructure as a service.

43. What are the types of amis?

Answer: we have different types of AMI which are provided by AWS.

1. Instance store Backed

2.EBS Backed

44.why we need to choose AWS?

Answer: we can choose  AWS because of the following reasons

1. Lower computing Cost is here
2. Improved Performance in AWS.
3. No need for IT maintenance
4. We can get Business connectivity
5. We can Easily Upgrade the environment
6. Device-independent in AWS.

45. What are the deployment modules of different Cloud services?

Answer: Following are the cloud modules

1. Private cloud
2. Public Cloud
3. Hybrid Cloud
4. Community Cloud 4

46. What are the advantages of Amazon web services?

Answer: Following are the advantages of  Amazon web services.

1. Pay as peruse
2. Elasticity
3. High Availability
4. Scalability Is high
5. Increase Agility and speed
6. Go global In any minutes

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47. How to access AWS?

Answer:

1. AWS Console
2. AWS CLI
3. AWS SDK(Software Development Kit)
4. 48. What is the pricing structure of EC2?Answer  :1.On-demand2.Reserved3.Spot Instance4.Dedicated Host49. What are the types of EC2 instances?Answer:1.General Purpose

   2.Compute Optimized

   3.Memory-Optimized

   4.Storage Optimized

   5.GPI Based

50. What are the Authentication methods in AWS?

Answer :

1.user Name /Password

2.Access Key

3.Session Token

 

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