AWS Interview Questions | Eklavya Online

AWS Interview Questions

Differences between horizontal scaling and vertical scaling?

Vertical scaling means scaling the compute power such as CPU, RAM to your existing machine while horizontal scaling means adding more machines to your server or database. Horizontal scaling means increasing the number of nodes, and distributing the tasks among different nodes.

What is the use of lifecycle hooks in Autoscaling?

Lifecycle hooks perform custom actions by pausing instances when Autoscaling group launches or terminates an instance. When instance is paused, an instance moves in a wait state. By default, an instance remains in a wait state for 1 hour. For example, when you launch a new instance, lifecycle hooks pauses an instance. When you pause …

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What is Amazon EMR?

An Amazon EMR stands for Amazon Elastic MapReduce. It is a web service used to process the large amounts of data in a cost-effective manner. The central component of an Amazon EMR is a cluster. Each cluster is a collection of EC2 instances and an instance in a cluster is known as node. Each node …

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What are the types of AMI provided by AWS?

There are two types of AMI provided by AWS: Instance store backed An instance-store backed is an EC2 instance whose root device resides on the virtual machine’s hard drive. When you create an instance, then AMI is copied to the instance. Since “instance store-backed” instances root device is stored in the virtual machine’s hard drive, …

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