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| Ans. Cloud Computing is a way of using IT infrastructure with following traits - 1. On Demand Infrastructure 2. Broad Network Access 3. Resource Pooling 4. Rapid Elasticity 5. Measured Service | ||||
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 Discuss Correct / Improve  google cloud platform (GCP) Amazon Web Services (AWS | ||||
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| Ans. AWS provides various types of services like Computing ( EC2 , Lambda , EKS ), Storage ( S3, Glacier ), Database ( RDS , DynamoDB ), Streaming ( Kinesis ), Queue ( SQS ), Security and Access ( IAM ) etc. | ||||
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| Ans. Warm up time for certain technologies like Java ( JVM Warmup ) Performance Size of Deployable ( Bigger size packaging should go in S3 ) | ||||
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Discuss Correct / Improve serverless technologies aws lambda aws serverless computing amazon cloud serverless computing amazon lambda  Asked in 1 Companies | ||||
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| Ans. Cloud Formation does not have any additional cost but you are charged for the underlying resources it builds. | ||||
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| Discuss Correct / Improve aws cloud formation | ||||
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| Ans. In AWS Lambda we can run a function in synchronous or asynchronous mode. In synchronous mode, if AWS Lambda function fails, then it will just give an exception to the calling application. In asynchronous mode, if AWS Lambda function fails then it will retry the same function at least 3 times.If AWS Lambda is running in response to an event in Amazon DynamoDB or Amazon Kinesis, then the event will be retried till the Lambda function succeeds or the data expires. In DynamoDB or Kinesis, AWS maintains data for at least 24 hours. | ||||
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| Discuss Correct / Improve aws lambda aws serverless computing amazon cloud serverless computing amazon lambda | ||||
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| Ans. A template for the instance. Launch permission decisions A block device mapping, when an instance is launched it determines the volumes to attach to that instances. | ||||
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| Discuss Correct / Improve aws ami amazon ami | ||||
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| Ans. US-East Virginia This is the oldest and most popular region. All new features are rolled first in this region and hence they are first available there. The downside is that because of experimentation with new services, unavailability time is quite high. | ||||
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| Discuss Correct / Improve aws region aws us-east-1 | ||||
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| Ans. It saves Network traffic and facilitates faster delivery by hosting bulk media and cached data near to client. | ||||
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| Discuss Correct / Improve aws edge locations | ||||
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| 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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| Discuss Correct / Improve aws iam amazon iam | ||||
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| 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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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 | ||||
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| 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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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 | ||||
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| Ans. Versioning ( will create Delete marker ) MFA Delete ( authentication upon deletion ) Cross Region Replication ( Replicates aren't deleted ) | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 | ||||
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| 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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| Discuss Correct / Improve aws cloudfront amazon cloudfront | ||||
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| 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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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 | ||||
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| Ans. If the usage is non continuous and have flexible start and End Time. For ex - Analysis , Research , mining etc. | ||||
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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 spot | ||||
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| Ans. On Demand Reserved Spot Dedicated Host | ||||
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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 | ||||
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| 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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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 | ||||
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| Ans. Computation Spot Price Plan F1 or P3 Instance Type Cold Hdd (SCI ) EBS Volume Storage S3-IA | ||||
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| Discuss Correct / Improve aws computation aws ec2 aws computing amazon cloud computing amazon ec2 | ||||
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| 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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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 aws security group | ||||
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| Ans. No, We can do that through ACL | ||||
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| Discuss Correct / Improve aws security group | ||||
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| Ans. S3 is object based whereas EFS is block based. | ||||
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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 aws efs | ||||
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| 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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| Discuss Correct / Improve aws amazon s3 aws s3 aws storage amazon cloud storage amazon s3 Asked in 12 Companies | ||||
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| Ans. Web Server and Worker | ||||
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| Discuss Correct / Improve elastic beanstalk | ||||
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| 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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| Discuss Correct / Improve aws api gateway aws lambda aws serverless computing amazon cloud serverless computing amazon lambda | ||||
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| 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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| Discuss Correct / Improve aws s3 aws storage amazon cloud storage amazon s3 aws lambda aws serverless computing amazon cloud serverless computing amazon lambda | ||||
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| 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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| Discuss Correct / Improve aws glacier | ||||
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| 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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| Discuss Correct / Improve aws storage gateway | ||||
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| 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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| Discuss Correct / Improve aws ec2 aws computing amazon cloud computing amazon ec2 aws ec2 aws computing amazon cloud computing amazon ec2 spot | ||||
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| 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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| Discuss Correct / Improve aws gateway aws gateway cached aws gateway stored aws gateway vtl | ||||
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| 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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| Discuss Correct / Improve aws computing | ||||
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