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Interview Questions and Answers - Order By Newest

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 Q2941. What type of consistency does Amazon S3 provides ?Amazon Web Service (AWS)
Ans. Eventual consistency


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   Like         Discuss         Correct / Improve     aws s3  aws storage  amazon cloud storage  amazon s3     Asked in 1 Companies


 Q2942. How to design a scalable S3 service ?Amazon Web Services (AWS)
 This question was recently asked at 'Amazon'.This question is still unanswered. Can you please provide an answer.


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 Q2943. Difference between EC2 and S3 ?Amazon Web Services (AWS)
Ans. Ec2 is a computing service whereas S3 is a object based storage.

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   Like         Discuss         Correct / Improve     aws ec2  aws computing  amazon cloud computing  amazon ec2  aws s3  aws storage  amazon cloud storage  amazon s3     Asked in 1 Companies


 Q2944. If you need 20000 IOPS, which EBS type should you use?Amazon Web Services (AWS)
Ans. Provisioned IOPS SSD

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   Like         Discuss         Correct / Improve     aws ebs


 Q2945. A company is planning to store documents in AWS storage, their requirement is initially when they store any documents they need to be available readily to download and after 15 days documents need not be readily available to download. Which type of storage will you choose?Amazon Web Services (AWS)
Ans. S3 standard, and then to Glacier.

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   Like         Discuss         Correct / Improve     aws s3  aws storage  amazon cloud storage  amazon s3  aws glacier


 Q2946. create an SQL query across multiple tables involving outer joins Database
Ans. Select * from table1 t1Left outer join table2 t2 on t1.tid = t2.id

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   Like         Discuss         Correct / Improve     sql query  database  outer joins     Asked in 2 Companies


 Q2947. What is the use of this keyword in javascript ?Javascript
Ans. This keyword refers to the current instance of the class.

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 Q2948. What is the limit for Ec2 SSH sessions ?Amazon Web Services (AWS)
Ans. Max sessions limit is defined in sshd_config. Default is set to 10 but can be overridden.

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   Like         Discuss         Correct / Improve     aws ec2  aws computing  amazon cloud computing  amazon ec2 ssh  aws ssh


 Q2949. Difference between Internet Gateway and Virtual private Gateway ?Amazon Web Services (AWS)
Ans. Internet gateway is a public gateway i.e allows direct http access whereas Virtual private gateway doesn't allow direct http access ( through VPN )

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   Like         Discuss         Correct / Improve     aws vpc


 Q2950. How can we specify / restrict communication between subnets ?Amazon Web Services (AWS)
Ans. route tables

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 Q2951. Can we have more than 1 internet gateway for a VPC in AWS ?Amazon Web Services (AWS)
Ans. No

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 Q2952. Difference between Default VPC and Custom VPC.Amazon Web Services (AWS)
Ans. Default VPC is provided by AWS whereas custom VPC needs to be created.

All subnets in default VPC have internet access whereas it's specified by user in Custom VPC.

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   Like         Discuss         Correct / Improve     aws vpc   aws default vs custom vpc


 Q2953. What is VPC Pairing ? Can we pair VPC across different account ?Amazon Web Services (AWS)
Ans. VPC pairing is a mechanism through which two VPC ( in same or different account ) can talk to each other.

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 Q2954. Do we have transitive pairing in case of VPC pairing ?Amazon Web Services (AWS)
Ans. No

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 Q2955. How can we allow communication between subnets ?Amazon Web Services (AWS)
Ans. Through security groups

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   Like         Discuss         Correct / Improve     aws subnet


 Q2956. Why should we disable source / destination check for NAT Gateway ?Amazon Web Services (AWS)
Ans. Source / destination check means that the instance should wither be a source or end destination as a security check. The purpose of NAT Instance is to provide a gateway for internet access and hence this needs to be unchecked.

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   Like         Discuss         Correct / Improve     aws nat gateway  aws vpc


 Q2957. Do we need to disable source / destination check for NAT Gateway ?Amazon Web Services (AWS)
Ans. It needs to be done for NAT Instances , not NAT gateway.

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 Q2958. Can we have NAT instance in private subnet ?Amazon Web Services (AWS)
Ans. No

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 Q2959. Have you ever worked on continuations in Java ?Core Java
 This question was recently asked at 'Overstock.com'.This question is still unanswered. Can you please provide an answer.


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 Q2960. Write a Program to print all nodes of the data structure ?Algorithm
 This question was recently asked at 'Overstock.com'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     data structure  algorithm     Asked in 1 Companies


 Q2961. Difference between composite , primary and unique key ?Database
 This question was recently asked at 'Thomson reuters'.This question is still unanswered. Can you please provide an answer.


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 Q2962. Which programming language you hate the most and Why ?General
 This question was recently asked at 'Thomson Reuters'.This question is still unanswered. Can you please provide an answer.


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 Q2963. How do you manage environment specific configuration for your lambda functions ?Amazon Web Services (AWS)
Ans. We are using Yaml for initializing configuration and Environment Variables for overriding them.

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   Like         Discuss         Correct / Improve     aws lambda  aws serverless computing  amazon cloud serverless computing  amazon lambda


 Q2964. Which is a better way to keep environment specific configuration in AWS Lambda - Environment Variables or external service like S3 or RDS ? Amazon Web Services (AWS)
Ans. Possible Answer - Env variable or use parameter store

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   Like         Discuss         Correct / Improve     aws lambda  aws serverless computing  amazon cloud serverless computing  amazon lambda


 Q2965. Can we load Yaml files into AWS DynamoDB ?Amazon Web Services (AWS)
Ans. No

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   Like         Discuss         Correct / Improve     aws dynamodb  aws nosql database  amazon cloud nosql database


 Q2966. Can we ssh into subnet without a internet gateway ?Amazon Web Services (AWS)
Ans. No

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   Like         Discuss         Correct / Improve     aws subset  aws internet gateway


 Q2967. Can constructors be final ?Core Java
Ans. No. They are never inherited and therefore are not subject to hiding or overriding.

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   Like         Discuss         Correct / Improve     constructor  final  final constructor     Asked in 1 Companies


 Q2968. Can a constructor be declared static ? Why ?Core Java
Ans. No.

When we declare a method static, it means that "this belongs to class as whole and not particular instance". The whole purpose of constructor is to initialize a object and hence there is no sense having static constructor.

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 Q2969. What is AWS Config service ?Amazon Web Services (AWS)
 This question is still unanswered. Can you please provide an answer.


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 Q2970. How can we take snapshots and track changes to environment variables in Elastic Beanstalk or Lambda ? Amazon Web Services (AWS)
Ans. We can use AWS Config

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   Like         Discuss         Correct / Improve     aws elastic beanstalk  amazon elastic beanstalk  aws lambda  aws serverless computing  amazon cloud serverless computing  amazon lambda


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