List Top 15 AWS Interview Questions


AWS is a popular cloud computing service. AWS is known for its technology that allows you to build, test, deploy, and manage applications and services. If you wish to get into AWS, you should clear the interview to be a part of it. For your assistance, here are a few interview questions. Go through them and prepare well.

  1. What is AWS?

This is the most common question asked in the interview. One should be straightforward while answering it. AWS is a cloud service platform that offers scalable, reliable, and secure computing power, content delivery, database storage, and other related services to help with business growth.

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  1. Mention the key components of AWS?

The key components of AWS are:

Route53 is a DNS web service.

Simple storage service (S3): it is a storage device and is mostly used by AWS services.

Identity and access management: it offers enhanced security and identity management for AWS accounts.

EC2: An elastic compute cloud that provides on-demand computing resources.

EBS: Elastic book store that provides persistent storage volumes.

CloudWatch is used to monitor AWS resources.

  1. What is S3?

S3 is known to be a simple storage service. Its interface is used to store and retrieve any amount of data anytime and from anywhere on the web.

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  1. Explain EC2?

It is a virtual machine in the cloud that carries an OS-level controller. This cloud server can be run anywhere when there is a need to deploy your own servers in the cloud. It is just like on-premises servers wherein you have full control over the hardware and updates on the machine.

  1. What is the relationship between an instance and an AMI?

Using a single AMI, you can easily launch multiple types of instances. An instance recollects the hardware of the host computer used for your instance. Each instance offers different types of compute and memory capabilities.

  1. What is the difference between Amazon S3 and EC2?

S3 is an abbreviation for simple storage service, and EC2 is an abbreviation for elastic compute cloud.S3 is a data storage service that stores large binary files, while EC2 is known to be a cloud web service that hosts all the applications created. While EC2 is used to run a server, S3 is not needed to run a server.

  1. How can you send a request to Amazon S3?

Amazon S3 is known to be a REST service. Thus, using a REST API or AWS SDK wrapper libraries, you can send a request to Amazon S3.

  1. What are the different types of instances?

The different types of instances are: compute optimized, memory-optimized, storage optimized, accelerated optimized and general purpose.

  1. How do you monitor Amazon VPC?

One can monitor Amazon VPC using CloudWatch and VPC flow logs.

  1. How do you explain stopping and terminating an EC2 instance?

Stopping an EC2 means that you immediately shut down as you normally do with your personal computer. It will not harm the volumes attached to the instances, and when you start it again, the instance will get started. Terminating an instance is just like deleting it. Once the termination is done, the volumes attached to it will get deleted, and even if it gets started again, it cannot be resumed or recovered.

  1. What is Geo-targeting in CloudFront?

Geo-targeting means customizing the content creation based on the user’s geographical location. It means providing the right type of content to the user. You can display the news related to local bodies to a person sitting in India, but you can’t display the same result to a person sitting in the US.

  1. What are the advantages of AWS IAM?

It enables the administrator to offer granular-level access to different users and groups to use it for different resources created. IAM is used to create roles with specific access levels and assign the roles to the users.

  1. What are the security best practices for Amazon EC2?

By using AWS identity and access management, that helps in controlling access to the AWS resources. by restricting access to only trusted hosts or networks to access the ports on the instances. By opening up the permissions that are required

  1. How are buffers used in Amazon Web Services?

The buffer is used in AWS to make the system robust and helps in managing the traffic or load by synchronizing different components. The buffer helps in balancing the components and aims at providing faster services.

  1. What are the popular DevOps tools?

Popular DevOps tools are: Jenkins, Git, Nagios, Selenium, Docker and Pupper, Chef and Ansible, etc.

The above are the top 15 AWS interview questions with answers. Before appearing for an interview, make sure to cross-check the answers with an expert. Prepare well and you can surely hit the game.

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