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Interview Questions and Answers - Order By Rating

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 Q601. Can we protect EC2 instances from terminating accidentally ?Amazon Web Services (AWS)
Ans. Yes

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 Q602. Difference between EC2 instance public and private key ?Amazon Web Services (AWS)
Ans. public key is used for locking whereas private key is used for unlocking. public key can be used for locking multiple instances and hence can be shared.

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 Q603. How have you configured Security Groups ?Amazon Web Services (AWS)
Ans. AWS console >> security groups >> Create security group >> Configure security group bases on Network requirement of EC2 instance

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 Q604. What is a volume in AWS ?Amazon Web Services (AWS)
Ans. It's a virtual hard disk that is attached to computing.

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 Q605. Does attached EBS volume get deleted if we terminate EC2 instance ?Amazon Web Services (AWS)
Ans. By default, Root volume gets terminated whereas additional volume doesn't.

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 Q606. What are the things to consider while provisioning computing in AWS ?Amazon Web Services (AWS)
Ans. Service ( EC2, Lambda etc )
AMI ( Operating System and Softwares )
Instance Type ( T,M, R etc )
EBS ( Volume Type , Size )
Price Class ( OnDemand, Dedicated etc )

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 Q607. Difference between List and ArrayList ?Core Java
Ans. List is an interface whereas ArrayList is an implementation of List.

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 Q608. What is the name of DNS service provided by AWS ?Amazon Web Services (AWS)
Ans. Route 53

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   Like         Discuss         Correct / Improve     AWS DNS  aws Route 53     Asked in 4 Companies


 Q609. Use Case for S3 RRS ?Amazon Web Services (AWS)
Ans. If Back up is not needed and can be restored from another storage.

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 Q610. Which is the default AWS Region ?Amazon Web Services (AWS)
Ans. US-EAST-1

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 Q611. How can EBS Volumes be backed up ?Amazon Web Services (AWS)
Ans. Through Snapshots

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 Q612. Which AWS services provide automated backups ?Amazon Web Services (AWS)
Ans. RDS, RedShift and Elastic Cache

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 Q613. What is the use case for AWS Gateway cached , stored and VTL ? Amazon Web Services (AWS)
Ans. AWS Cached - Low Availability than AWS Stored, Lower cost than AWS Stored

AWS Stored - High Availability, High Local Storage Cost

AWS VTL - S3 Used as Back up only.


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 Q614. Import / Export can import data set from ..Amazon Web Services (AWS)
Ans. S3, EBS and Glacier

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 Q615. Can we change the instance Type while it's running ?Amazon Web Services (AWS)
Ans. No

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 Q616. Which is the most common EC2 instance Type ? Amazon Web Services (AWS)
Ans. T and M

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 Q617. What are the factors on which price classes are based on in case of EC2, S3, CloudFront and EBS ?Amazon Web Services (AWS)
Ans. EC2 - Time and Reservation , Instance Type ( Memory , Computation power )
S3 - Accessibility Frequency , Data Transfer , Storage Space
CloudFront - Geography, No of Locations
EBS - IOPS, Access Frequency

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 Q618. What is the use case for Geo Targeting / Price Class within AWS CloudFront ?Amazon Web Services (AWS)
Ans. Saving cost by optimizing content retrieval or upload in certain Geographies.

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 Q619. What is the use case for AWS Snowball ?Amazon Web Services (AWS)
Ans. Faster upload of Content through Physical device instead of low speed internet connection.

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 Q620. What is the need of S3 Transitioning ?Amazon Web Services (AWS)
Ans. Saving Cost by either expiring objects or moving to low cost storage.

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 Q621. What is the use case of S3 Cross Region replication ?Amazon Web Services (AWS)
Ans. Disaster Recovery and availability

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 Q622. What is the use case of AWS CloudFront ?Amazon Web Services (AWS)
Ans. Faster availability and uploading of files and content.

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 Q623. Which EBS Volume type cannot be used as a root volume ?
Amazon Web Services (AWS)
Ans. Throughput Optimal HDD and Cold HDD

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 Q624. What are the drawbacks of using Spot EC2 instances ?Amazon Web Services (AWS)
Ans. You cannot reserve the time slot and they can be made to use whenever they are available.

AWS can Terminate the EC2 instance on their own even if it's in use.

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 Q625. What are the different EC2 instance types ?Amazon Web Services (AWS)
Ans. F,I,G,H,T,D,R,M,C,P,X

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 Q626. Can we have EBS Volumes in S3 ?Amazon Web Services (AWS)
Ans. No , S3 is an object storage and not a Block Storage. But EBS Volume snapshots are internally stored in S3.

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 Q627. If you override hashcode to always return true, how a hash based collection will behave?Core Java
Ans. At that bucket, it will form a linked list depending on what equals method evaluates for that object.

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   Like         Discuss         Correct / Improve     hashcode  collections     Asked in 2 Companies


 Q628. Which is the cheapest EC2 instance type ?Amazon Web Services (AWS)
Ans. T

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 Q629. Which EC2 instance type should be used if the application is memory intensive ?Amazon Web Services (AWS)
Ans. R4

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 Q630. Which EBS Volume is suitable if we need to install SQL with every high requests per second ?Amazon Web Services (AWS)
Ans. We can use "Provisioned IOPS SSD"

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