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 Q31. What does effect , action and resource means with respect to AWS IAM policy ?Amazon Web Services (AWS)
Ans. effect means whether the effect of this Policy is to allow or deny, action means the type of action ( read , write ) and service, and resource is the resource where this should apply.

For example - If we want to have a Policy of providing read access on S3 ,
effect will be "allow"
action will be "s3:GetObject"
resource will be "arn:aws:s3:::examplebucket/*"

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   Like         Discuss         Correct / Improve     aws iam  amazon iam

 Q32. Within AWS S3, Why new files are available immediately for read operation but not the updates ? Amazon Web Services (AWS)
Ans. Because new files will be fed from where ever they are first available but AWS have no way to identify which is the most updated version among the various regions. The updated version can only be assured once the replication to all availability zones is complete.

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

 Q33. What kind of Access Policy should be kept on S3 Buckets and Policy ?Amazon Web Services (AWS)
Ans. We should only allow access that's needed. So the security Policy should be as restrictive as possible.

Buckets and Files should never be made public unless until they are needed it to be like that.

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

 Q34. How can we protect from accidental deletes in S3 ?Amazon Web Services (AWS)
Ans. Versioning ( will create Delete marker )
MFA Delete ( authentication upon deletion )
Cross Region Replication ( Replicates aren't deleted )

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

 Q35. How can we restrict CloudFront access to a particular Geography ?Amazon Web Services (AWS)
Ans. We can select the appropriate Price Class if that suits us.

We can do Geo Targeting by black listing / white listing certain geographies.

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   Like         Discuss         Correct / Improve     aws cloudfront  amazon cloudfront

 Q36. What is the use case for "On Demand" EC2 ?Amazon Web Services (AWS)
Ans. If the computation required is Spiky and unpredictable.

If it's first time use.

If the lifespan of the application isn't known.

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

 Q37. What is the use case for "Spot" EC2 plan ?Amazon Web Services (AWS)
Ans. If the usage is non continuous and have flexible start and End Time. For ex - Analysis , Research , mining etc.

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 Q38. What are the different price options available for EC2 ?Amazon Web Services (AWS)
Ans. On Demand
Reserved
Spot
Dedicated Host

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 Q39. What EC2 configuration would you use if you have to use it for Bitcoin mining ?Amazon Web Services (AWS)
Ans. Keeping Low cost for processing , i would choose

Spot Price Plan
F1 or P3 Instance Type
Cold Hdd (SCI ) EBS Volume

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 Q40. Which AWS services would you use if you have find a cheapest solution for an analytics application ?Amazon Web Services (AWS)
Ans. Computation

Spot Price Plan
F1 or P3 Instance Type
Cold Hdd (SCI ) EBS Volume

Storage

S3-IA

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

 Q41. Can a EC2 instance have multiple Security Groups ? Can a single security group be assigned to multiple Ec2 instances ? If either of them is true , doesn't it result in conflict ?Amazon Web Services (AWS)
Ans. We can assign multiple security groups to single instance and we can use single security group with multiple instances.

It never results in conflict as security groups only have allow rules and no deny rules. Multiple security groups for an instance results in union of all rules.

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

 Q42. Can we deny access for particular IP using Security Groups ?Amazon Web Services (AWS)
Ans. No, We can do that through ACL

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 Q43. Difference between S3 and EFS ?Amazon Web Services (AWS)
Ans. S3 is object based whereas EFS is block based.

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

 Q44. There is a server which is 90% full, I need to increase the space. How can I do it ?Server
Ans. Firstly ,we have removed old backup data from server after that we are checking which user consume high memory through df command.

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   Like         Discuss         Correct / Improve     server  Amazon Web Service (AWS)  production support     Asked in 1 Companies

 Q45. What is Amazon S3 ?Amazon Web Services (AWS)
Ans. Amazon Simple Storage Service or S3 is object storage with a simple web service interface to store and retrieve any amount of data from anywhere on the web.

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   Like         Discuss         Correct / Improve     aws  amazon s3  aws s3  aws storage  amazon cloud storage  amazon s3     Asked in 12 Companies

 Q46. What are the types of applications we can create using Elastic Beanstalk ?Amazon Web Services (AWS)
Ans. Web Server and Worker

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 Q47. What are the reasons to choose between reserved and on demand instances ?Server
Ans. In terms of compute options and configurations, Reserved Instances and On Demand instances are the same. The only difference between the two is that a Reserved Instance is one you rent (reserved) for a fixed duration, and in return you receive a discount on the base price of an On Demand instance.

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   Like         Discuss         Correct / Improve     aws  aws ec2  aws computing  amazon cloud computing  amazon ec2  production support  Google Cloud Platform (GCP)

 Q48. Can you explain the integration between API Gateway and Lambda if we wish to develop services using these tools.Amazon Web Services (AWS)
Ans. We can create API gateway and give the name of lambda function in order to be linked with lambda function, deploy the API and whenever request will be made from API it will directly be linked to lambda function to perform further process.

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 Q49. What would you do if you see an error thrown by a lambda function as "Access Denied" while doing something with S3 ?Amazon Web Services (AWS)
Ans. Just like people , AWS resources too have execution roles or permissions. Seems like in such a situation Lambda function may not have sufficient privileges to perform operations on S3. For example - The execution role of Lambda may just have read permissions on S3 and we may be trying to perform PutObject operation.

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   Like         Discuss         Correct / Improve     aws s3  aws storage  amazon cloud storage  amazon s3  aws lambda  aws serverless computing  amazon cloud serverless computing  amazon lambda

 Q50. What is the use of Amazon Glacier?Amazon Web Services (AWS)
Ans. Its a storage option provided by AWS which is even cheaper than S3. As the objects are archieved before saving, retrieval time is pretty bad.

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 Q51. What is AWS Storage Gateway?Amazon Web Services (AWS)
Ans. It's an on premise virtual appliance that can be used as cache to store s3 locally at customer site.

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 Q52. 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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   Like         Discuss         Correct / Improve     aws ec2  aws computing  amazon cloud computing  amazon ec2  aws ec2  aws computing  amazon cloud computing  amazon ec2 spot

 Q53. 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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   Like         Discuss         Correct / Improve     aws gateway  aws gateway cached  aws gateway stored  aws gateway vtl

 Q54. 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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   Like         Discuss         Correct / Improve     aws computing

 Q55. 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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 Q56. What is a Volume Snapshot ?Amazon Web Services (AWS)
Ans. Snapshots are point in time copies of Volume.

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   Like         Discuss         Correct / Improve     aws ebs  aws ebs volume

 Q57. Which of the Load balancer - Application / Network provides advanced features ? What is the use of other Load Balancer than if one provides advanced feature than other ?Amazon Web Services (AWS)
Ans. Application Load Balancer is high level ( Level 7 Networking Layer ) and provides better features and flexibility than Network Load Balancer ( Level 4 Network Layer )

Network Load Balancer is turn provides better performance as it regulates raw traffic.

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   Like         Discuss         Correct / Improve     aws elb  amazon elb

 Q58. What is the purpose of EC2 Health check ?Amazon Web Services (AWS)
Ans. We can use this check for variety of things -

1. Monitoring the status / Alarms in case it's down
2. Regulating traffic to healthy instances only through Load Balancer

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

 Q59. Difference between EFS and EBS ?Amazon Web Services (AWS)
Ans. Both EFS and EBS are block storage but EBS is reserved storage whereas EFS is On Demand.

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 Q60. Which AWS computing service provides IAAS, PAAS , Containerization and Serverless ?Amazon Web Services (AWS)
Ans. EC2 is IAAS
Elastic Beanstalk is PAAS
EKS is Containerization service
Lambda is Serverless

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   Like         Discuss         Correct / Improve     IAAS   PAAS    Containerization  Serverless

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