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Q61. What is Amazon EC2 ?

Amazon Web Services (AWS)

Ans. Amazon Elastic Compute Cloud or EC2 provides scalable computing capacity in the AWS cloud. It can be used to create Virtual Environments , storage and configure. EC2 enables to upgrade or downgrade infrastructure according to the rules defined ( with fluctuation in latency, traffic etc )

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Q62. What is the difference between Elastic Compute Cloud and Elastic Beanstalk ?

Amazon Web Services (AWS)

Ans. EC2 is Amazon computing service whereas Elastic Beanstalk is the AWS service for deploying and managing web applications.

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Q63. How do you check logs for your application in AWS ?

Amazon Web Services (AWS)

Ans. We can do it by either going to Elastic Beanstalk -> Respective instance -> Logs

or using CloudWatch -> Logs -> Respective Log Group

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Q64. What is AWS CloudWatch ?

Amazon Web Services (AWS)

Ans. Amazon CloudWatch is a monitoring service for AWS cloud resources like Beanstalk and DB instances. We can use CloudWatch to monitor the state of resources, collect metrices, set alarms and appropriate response to the alarm state.

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Q65. What is a shard in Kinesis stream ?

Amazon Web Services (AWS)

Ans. A shard is a uniquely identified group of data records in a stream or we can say that Shard is a partition in Kinesis stream. A shard supports a fixed bandwidth i.e fixed number of messages per second. The total capacity of the stream is the sum of the capacities of its shards. If the data rate changes, we can allocate / deallocate more shards to accommodate that.

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Q66. What is the relationship between shard and partition key in kinesis stream ?

Amazon Web Services (AWS)

Ans. A partition key is used to group data by shard within a stream. A partition key identifies which shard the message belong to.

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Q67. How can we know how many instances are currently in service within an Elastic Beanstalk environment ?

Amazon Web Services (AWS)

Ans. We can go to respective environment and check configuration and then scaling. It mentions that as current status like

Current status:

2 instance(s) in service, Min: 1, Max: 4

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Q68. Which components of AWS are you using in your project ?

Amazon Web Services (AWS)

Ans. We are using EC2 and Lambda for computing, RDS for Database , S3 for Storage , SQS and Kinesis for streaming and queue and CloudWatch for monitoring.

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Q69. What is the difference between Reserved and On Demand instance ?

Amazon Web Services (AWS)

Ans. On demand instance is normal instance means if you create first time so you can use on demand instance, in this instance you can create simple server like 2 gb RAM, 1 core CPU, GP2 30 GB SSD....etc.

and Reserved instance is you can create server and its reserved for 2-3 years and when you give back to this server on AWS they give you discount but on demand and reserved instance price are same.

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Q70. What is EC2 and EC2 instance ?

Amazon Web Services (AWS)

Ans. EC2 is elastics compute cloud is one of the amazon service and ec2 instance is one type of virtual server which you create from AMI.

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Q71. What are the various security and access services provided by AWS ?

Amazon Web Services (AWS)

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Q72. What are some of the computation services provided by AWS ?

Amazon Web Services (AWS)

Ans. EC2, EKS, EKC , Lambda

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Q73. Tell me something about Amazon Lambda.

Amazon Web Services (AWS)

Ans. AWS Lambda is an event-driven, serverless computing platform provided by Amazon as a part of Amazon Web Services. It is a computing service that runs code in response to events and automatically manages the computing resources required by that code. It was introduced in November 2014.

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Q74. What are some of the storage and database services provided by AWS ?

Amazon Web Services (AWS)

Ans. Storage - S3, Glacier
Database - RDS, DynamoDB

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Q75. Difference between Amazon RDS and Amazon DynamoDB ?

Amazon Web Services (AWS)

Ans. Amazon RDS provides relational database services whereas DynamoDb provide No SQL database services.

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Q76. What is the difference between AWS Gateway API and Lambda ?

Amazon Web Services (AWS)

Ans. AWS API Gateway is the endpoint URI to get invoke. Whereas Lambda is the compute function being invoked from API Gateway or S3 or SNS

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Q77. Can we build web services using AWS Lambda ?

Amazon Web Services (AWS)

Ans. We have to complement it to AWS Gateway API.

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Q78. What are the benefits of using AWS Lambda over EC2 ?

Amazon Web Services (AWS)

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Q79. Can we reserve resources in AWS Lambda just like we do for Ec2 instances ?

Amazon Web Services (AWS)

Ans. You can have reserved capacity with AWS Lambda. This guarantees that this number of concurrent Lambdas are always available for that function.

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Q80. How to know IP of the machine where lambda function runs ?

Amazon Web Services (AWS)

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Q81. What should we do If we need to know the IP of the machine where Lambda function runs ?

Amazon Web Services (AWS)

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Q82. How to assign a static or IP range to Lambda Function ?

Amazon Web Services (AWS)

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Q83. What are you using AWS lambda for ?

Amazon Web Services (AWS)

Ans. We are using it for computation (EC2) , Storage (S3) and Database (RDS)

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Q84. What are you using AWS lambda for ?

Amazon Web Services (AWS)

^{This question was recently asked at 'Western Governors University (WGU)'.This question is still unanswered. Can you please provide an answer.}

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Q85. Have you ever worked on migrating AWS services and databases from one account to another ?

Amazon Web Services (AWS)

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Q86. Do you know how can we export Redis data ?

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Q87. How do you usually choose which type of EC2 Instance you would like to Use ?

Amazon Web Services (AWS)

Ans. Depend on its pricing module

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Q88. Can making the S3 bucket public ,makes all objects / files inside as public too ?

Amazon Web Services (AWS)

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Q89. How can we make an S3 file public through Java program ?

Amazon Web Services (AWS)

Ans. We can get the object and then can set CannedAcl property as "PublicRead"

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Q90. How can we schedule Lambda function to run daily ?

Amazon Web Services (AWS)

Ans. We can schedule that through CloudWatch.

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