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 Q2401. 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


 Q2402. 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


 Q2403. 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


 Q2404. Why it takes longer to create first volume snapshot but subsequent snapshots are faster ?Amazon Web Services (AWS)
Ans. Because AWS stores subsequent snapshots as only incremental information.

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   Like         Discuss         Correct / Improve     aws ebs snapshot


 Q2405. 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


 Q2406. 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


 Q2407. What is the DNS port no ?Networking
Ans. 53

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   Like         Discuss         Correct / Improve     Amazon Web Services (AWS)  DNS


 Q2408. How does Route53 support naked domain names ?Amazon Web Services (AWS)
Ans. Through Aliasis

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   Like         Discuss         Correct / Improve     aws route53


 Q2409. Difference between Route53 aliasis and cname ?Amazon Web Services (AWS)
Ans. Cname doesn't support naked domain names whereas aliasis does.

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   Like         Discuss         Correct / Improve     aws route53     Asked in 3 Companies


 Q2410. What are the advantages of using Aliasis over Cname in Route53 ?Amazon Web Services (AWS)
Ans. 1. Supports naked domain names
2. Any change in ELB IP is automatically updated in Route53

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 Q2411. What is the default limit of domain supported by Route 53 ?Amazon Web Services (AWS)
Ans. 50

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 Q2412. 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


 Q2413. What is the limit of read replicas per database ?Amazon Web Services (AWS)
Ans. 5

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 Q2414. 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


 Q2415. Which Route53 routing policy is best, keeping in mind the response time ?Amazon Web Services (AWS)
Ans. Latency

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   Like         Discuss         Correct / Improve     aws route53 policy


 Q2416. Does Route53 supports MX records ?Amazon Web Services (AWS)
Ans. Yes

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 Q2417. What are the factors on which RedShift is priced on ?Amazon Web Services (AWS)
Ans. Compute Node Hours
Backup
Data Transfer

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   Like         Discuss         Correct / Improve     aws data warehouse  aws database  aws redshift


 Q2418. If you need to spin multiple EC2 instances and then so a swap, How would you do that with minimal downtime ?Amazon Web Services (AWS)
 This question was recently asked at 'SparkPost'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve          Asked in 1 Companies


 Q2419. 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


 Q2420. Which AWS service we can use Docker with ?Amazon Web Services (AWS)
Ans. EKS

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 Q2421. Explain how CDN works ?Amazon Web Services (AWS)
 This question was recently asked at 'Imperva'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve          Asked in 1 Companies


 Q2422. 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


 Q2423. What is your experience with AWS EMR ?Amazon Web Services (AWS)
 This question was recently asked at 'Cognizant (CTS)'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     aws emr     Asked in 1 Companies


 Q2424. 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


 Q2425. 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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   Like         Discuss         Correct / Improve     aws s3  aws storage  amazon cloud storage  amazon s3     Asked in 1 Companies


 Q2426. 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


 Q2427. 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


 Q2428. 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


 Q2429. 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


 Q2430. 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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   Like         Discuss         Correct / Improve          Asked in 1 Companies


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