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Interview Questions and Answers - Order By Newest

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 Q181. What is the difference between EC2 System status check and Instance status check ?Amazon Web Services (AWS)
Ans. System status check is to check if the power or network is working whereas Instance status check goes further and make sure that traffic is going through.

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 Q182. Which AWS service can be used to monitor EC2 ?Amazon Web Services (AWS)
Ans. CloudWatch

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 Q183. Can EBS Volume be encrypted ?Amazon Web Services (AWS)
Ans. Yes but not the root volume of default AMIs.

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 Q184. Difference between AWS Root and Additional Volume ?Amazon Web Services (AWS)
Ans. Root Volume is the primary volume used for installing operating system whereas Additional volume is just additional disk space.

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 Q185. Can we use magnetic storage as Root Volume ?Amazon Web Services (AWS)
Ans. Yes , but only Magnetic standard.

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 Q186. Can we have EC2 and EBS in different availability zones or regions ?Amazon Web Services (AWS)
Ans. No, they need to be local

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 Q187. Can we modify volume while attached EC2 is running ?Amazon Web Services (AWS)
Ans. Yes, except Magnetic standard

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 Q188. Can we move volumes across regions or availability zones ?Amazon Web Services (AWS)
Ans. Yes, We can do that through snapshots and AMI

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 Q189. Can we create an AMI using volumes ?Amazon Web Services (AWS)
Ans. Yes , We can create snapshots with Volumes and then AMIs with Snapshots.

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 Q190. Where are snapshots internally stored by AWS ?Amazon Web Services (AWS)
Ans. In S3

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 Q191. How can we create our own AMI ?Amazon Web Services (AWS)
Ans. Volume -> Snapshot -> AMI

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 Q192. Can we create AMI with encrypted snapshots ?Amazon Web Services (AWS)
Ans. No they need to be unencrypted before an AMI is created.

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 Q193. Difference between AMI EBS based and AMI Instance Store based ?Amazon Web Services (AWS)
 This question is still unanswered. Can you please provide an answer.


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 Q194. How would you securely migrate a database to RDS?Amazon Web Services (AWS)
 This question was recently asked at 'Cognizant (C?TS),Overstock'.This question is still unanswered. Can you please provide an answer.


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 Q195. What are the different types of AWS Load Balancers ?Amazon Web Services (AWS)
Ans. Application , Network and Classic

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 Q196. Difference between internal and external Load Balancer ?Amazon Web Services (AWS)
Ans. Internal Load balancer is used for services which are for internal consumption only and hence doesn't need to direct Web traffic.

External Load balancers are for regulating web traffic.

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 Q197. Are CloudWatch metrics available with free tier ?Amazon Web Services (AWS)
Ans. Only Basic not advanced

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 Q198. What are the Default metrics available for EC2 in CloudWatch ?Amazon Web Services (AWS)
Ans. CPU, Disk, Network, Status

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 Q199. How frequently Cloudwatch monitor AWS services for generating metrics ?Amazon Web Services (AWS)
Ans. 5 mins for Standard / Basic
1 min for Detailed / advanced

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 Q200. Difference between CloudWatch and CloudTrail ?Amazon Web Services (AWS)
Ans. CloudWatch is for monitoring resources whereas CloudTrail is for auditing activity.

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 Q201. Somebody changed the permissions on a S3 bucket, Which Aws service can help locate the user who performed the action ?Amazon Web Services (AWS)
Ans. CloudTrail

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 Q202. Are you using Auto Scaling for your EC2 instances ? How have you configured Auto scaling policy ?Amazon Web Services (AWS)
Ans. yes, you can create auto scaling policy to set max and min no of instance.

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 Q203. What are different types of EC2 Placement Groups in AWS ? What is the difference between them ?Amazon Web Services (AWS)
Ans. Clustered and Spread

All instances in Clustered group is in same availability zone and whereas instances in spread could be in different az or regions.

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 Q204. Can we use all EC2 instance types in placement group ?Amazon Web Services (AWS)
Ans. No, only the following type are allowed

Compute Optimized
GPU
Memory Optimized
Storage Optimized

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 Q205. Can we merge placement groups ?Amazon Web Services (AWS)
Ans. No

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 Q206. Can we move an existing instance to a placement group ?Amazon Web Services (AWS)
Ans. No but we can create an AMI and then launch a new instance in placement group.

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 Q207. What are the factors on which Lambda usage is priced ?Amazon Web Services (AWS)
Ans. No of requests, computation duration, assigned RAM

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 Q208. Can we associate a single EBS volume with multiple EC2 instances ?Amazon Web Services (AWS)
Ans. No

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 Q209. Can we attach single volume to multiple Ec2 instances ?Amazon Web Services (AWS)
Ans. Yes EFS volumes but not EBS

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 Q210. 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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