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 Q1831. Can we attach single volume to multiple Ec2 instances ?Amazon Web Services (AWS)
Ans. Yes EFS volumes but not EBS

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


 Q1832. What is the use case of having Code Commit trigger within AWS Lambda ?Amazon Web Services (AWS)
Ans. If we would like a program to be executed if someone commits code to the repository.

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


 Q1833. Why serverless is called serverless if there are actually servers serving the requests ?Infrastructure
Ans. Because Vendors need not worry about provisioning , managing and maintaining the servers and it's intrinsically taken care of by AWS.

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   Like         Discuss         Correct / Improve     Amazon Web Services (AWS)  aws serverless  aws lambda  aws serverless computing  amazon cloud serverless computing  amazon lambda


 Q1834. What is Amazon Polly ?Amazon Web Services (AWS)
Ans. It's a service to convert text to speech.

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   Like         Discuss         Correct / Improve     aws polly


 Q1835. Can we delete a snapshot of EBS that is used as the root device of a registered AMI ?Amazon Web Services (AWS)
Ans. No, We need to de register it first.

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   Like         Discuss         Correct / Improve     aws ebs snapshot  aws ebs volume snapshot  aws ami  amazon ami


 Q1836. What is the use case of AWS Placement Group ?Amazon Web Services (AWS)
Ans. Computing that would require high network throughput and low latency within a single availability zone.

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   Like         Discuss         Correct / Improve     aws ec2  aws computing  amazon cloud computing  amazon ec2 placement group  aws placement group


 Q1837. Difference between multi AZ RDS and Read replicas ?Amazon Web Services (AWS)
Ans. Multi AZ RDS is for disaster recovery and failover whereas Read replicas are for scaling.

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   Like         Discuss         Correct / Improve     aws rds  aws database  amazon cloud database multi az  aws rds  aws database  amazon cloud database read replica


 Q1838. What is the limit of read replicas per database ?Amazon Web Services (AWS)
Ans. 5

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 Q1839. What is the ideal use case for DynamoDB ?Amazon Web Services (AWS)
Ans. Fast reads
Much more reads than writes

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


 Q1840. Which Route53 routing policy is best, keeping in mind the response time ?Amazon Web Services (AWS)
Ans. Latency

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 Q1841. Describe AWS VPC and subnets.Amazon Web Services (AWS)
Ans. VPC stands for Virtual Private Cloud. You can define a VPC and subnets for a region in AWS and that can be used to access shared resources on the cloud. For eg: API gateway to access any file on S3.

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   Like         Discuss         Correct / Improve     aws vpc  aws subnets     Asked in 3 Companies


 Q1842. Can you explain what are NAT instances and what are they used for ?Amazon Web Services (AWS)
Ans. If instances in private subnet need to access internet without exposing the IP address to outside world , we use Nat gateway or nat instance. So there is a direct outbound traffic but not direct inbound traffic.

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   Like         Discuss         Correct / Improve     aws ec2  aws computing  amazon cloud computing  amazon ec2  nat instances


 Q1843. 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


 Q1844. 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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 Q1845. 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


 Q1846. 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


 Q1847. 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


 Q1848. 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


 Q1849. 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


 Q1850. 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


 Q1851. 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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   Like         Discuss         Correct / Improve          Asked in 1 Companies


 Q1852. 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


 Q1853. 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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 Q1854. 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


 Q1855. 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


 Q1856. 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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   Like         Discuss         Correct / Improve     constructor  static  static constructor     Asked in 1 Companies


 Q1857. 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


 Q1858. If you are asked to develop a financial system, how would you make sure that there are proper checks , balances and audits ?Solution
 This question was recently asked at 'BzzAgent'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     Design  Security     Asked in 1 Companies


 Q1859. How can you prove your honesty ?General
 This question was recently asked at 'Gallup'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve          Asked in 1 Companies


 Q1860. Which maven commands you usually work with ?Maven
 This question was recently asked at 'Akvelon'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     maven     Asked in 1 Companies


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