Amazon Web Services (AWS) - Interview Questions and Answers for 'Amazon ec2' | Search Interview Question

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Q31. What is the use case for "Dedicated Host" EC2 plan ?

Amazon Web Services (AWS)

Ans. If there are regulatory requirements, or proprietary license to be used.

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Q32. 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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Q33. What is the use case for "Reserved" EC2 plan ?

Amazon Web Services (AWS)

Ans. If the usage is continuous , stable and predictable.

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Q34. 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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Q35. What is the default limit on number of EC2 instances in each region ?

Amazon Web Services (AWS)

Ans. 20

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Q36. 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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Q37. 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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Q38. What are some of the computation services provided by AWS ?

Amazon Web Services (AWS)

Ans. EC2, EKS, EKC , Lambda

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Q39. 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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Q40. 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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Q41. 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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Q42. What do you understand by "Scaling Trigger" ?

Server

Ans. It's a configuration for auto scaling environment that specify the attributes / conditions for scaling instances up and down. For example - We may like environment to scale up when the number of requests / sec increases a particular threshold and scale down when it decreases below a threshold.

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Q43. 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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