AWS Interview Questions and Answers in 2026

Nowadays, where every organization tends to shift its manual database to digital, the first choice an enterprise comes up with is cloud computing where there is no problem holding the datasets of any hard drive which saves a lot of time, cost, and manpower to hold those datasets. In this regard, they sincerely require a cloud computing platform and dedicated personnel duly inclined to safeguard the integrity of digital assets possessed in the corresponding datasets.

Moreover, the newly AWS Certified candidates come up with a lot of stress and questions about the intensity of questions that the interviewers would through upon them during their face-to-face interactions with them. Hence, Craw Security, the best cloud security training institute in India, brings you the Top 20 AWS Interview Questions that are frequently asked during interview sessions of distinguished AWS Certified professionals, which are as follows:

Top 20 AWS Interview Questions and Answers

1: What is Amazon Web Services (AWS)?

Amazon Web Services (AWS) is a cloud computing platform offered by Amazon.com. It provides a wide range of services such as computing, storage, networking, database, analytics, application services, deployment, management, mobile, developer tools, and tools for the Internet of Things (IoT).

What Is Amazon Web Services (AWS)? A Complete Beginner-Friendly Guide

Moreover, AWS enables organizations to build, deploy, and manage applications and services on a highly reliable and secure cloud infrastructure. With AWS, customers can access various services hosted on Amazon’s secure and reliable cloud infrastructure, and pay only for the services they use.

Real also: What Is Amazon Web Services (AWS)?

2: What are the main components of AWS?

The main components of AWS are as follows:

Amazon EC2 (Elastic Compute Cloud)
Amazon S3 (Simple Storage Service)
Amazon RDS (Relational Database Service)
Amazon VPC (Virtual Private Cloud)
Amazon CloudFront
Amazon Lambda
Amazon EMR (Elastic MapReduce)

3: What is Amazon Elastic Compute Cloud (EC2)?

Amazon Elastic Compute Cloud (EC2) is a web service that provides secure, resizable computing capacity in the cloud. In addition, it is designed to make web-scale cloud computing easier for developers. Moreover, EC2 enables users to rent virtual computers on which to run their own computer applications. EC2 provides a wide selection of instance types with varying combinations of CPU, memory, storage, and networking capacity that can be launched in minutes.

4: What is Amazon Simple Storage Service (S3)?

Amazon Simple Storage Service (S3) is an object storage service from Amazon Web Services (AWS) that provides secure, durable, and highly-scalable cloud storage. In addition, it is highly designed to store and retrieve any amount of data from anywhere on the web.

Moreover, AWS S3 is used for a wide range of applications, including hosting websites and backing up data. With S3, users can store and access any type of data from a single source, including photos, videos, audio files, documents, and more. S3 is an essential storage service for businesses of all sizes.

5: What is Amazon Elastic Block Store (EBS)?

Amazon Elastic Block Store (EBS) is a block storage service provided by Amazon Web Services (AWS) that provides persistent storage for Amazon Elastic Compute Cloud (EC2) instances. In addition, EBS provides block-level storage volumes that can be attached to EC2 instances and are used to store data that can be accessed by EC2 instances.

Henceforth, EBS volumes are automatically replicated within an availability zone to protect data from the failure of a single physical device.

6: What is Amazon Relational Database Service (RDS)?

Amazon Relational Database Service (RDS) is a managed cloud database service that provides access to the capabilities of a relational database while automating time-consuming administrative tasks such as hardware provisioning, database setup, patching, and backups. In addition, Amazon RDS is available on several database instance types and offers features such as read replicas, automated backups, and point-in-time recovery.

7: What is Amazon DynamoDB?

Amazon DynamoDB is a fully managed, highly scalable NoSQL database service offered by Amazon Web Services. It is designed to handle large amounts of data in a fast and reliable manner, allowing developers to quickly and easily store and retrieve data from the cloud.

Moreover, DynamoDB supports a variety of data models, including key-value, document, and wide-column store. It also offers a range of features such as in-memory caching and auto-scaling to help optimize performance.

8: What is Amazon Elasticache?

Amazon ElastiCache is a web service that makes it easy to deploy, operate, and scale an in-memory data store or cache in the cloud. Further, ElastiCache supports two open-source in-memory caching engines: Memcached and Redis (also called “ElastiCache for Redis”).

With ElastiCache, customers can benefit from the performance, flexibility, and scalability of in-memory caching without worrying about managing cache clusters.

9: What is Amazon Elastic MapReduce (EMR)?

Amazon Elastic MapReduce (EMR) is a web service that makes it easy to process vast amounts of data quickly and cost-effectively. It utilizes a hosted Hadoop framework running on the web-scale the infrastructure of Amazon Elastic Compute Cloud (Amazon EC2) and Amazon Simple Storage Service (Amazon S3).

With Amazon EMR, you can set up and scale your data processing environments quickly and cost-effectively. Amazon EMR makes it easy to run a wide variety of big data frameworks, including Apache Spark, Hadoop, Presto, and Flink, as well as popular open-source applications such as Apache Hive, Apache Pig, and Apache Mahout.

10: What is Amazon Kinesis?

Amazon Kinesis is a platform for streaming data on Amazon Web Services (AWS). It is designed for real-time processing of streaming data at a massive scale and can be used for a variety of different use cases including data ingest, analytics, and data processing.

In addition, it can ingest data from sources such as social media, IoT devices, and log files, and can store the data in a highly durable and available manner. It also provides an easy-to-use API so that developers can quickly build applications to capture, process, and analyze streaming data.

11: What is Amazon QuickSight?

Amazon QuickSight is a business intelligence and analytics service provided by Amazon Web Services. In addition, it allows users to visualize and analyze data, create dashboards and reports, and collaborate in the cloud. QuickSight is designed to be fast, cost-effective, and easy to use.

12: What is Amazon Redshift?

Amazon Redshift is a fully managed, petabyte-scale data warehouse service in the cloud. In addition, it enables organizations to quickly and cost-effectively analyze large amounts of data using existing business intelligence tools. So far, Redshift is highly scalable, secure, and cost-effective, and is designed to provide users with fast query performance and high availability.

13: What is Amazon Route 53?

Amazon Route 53 is a highly available and scalable Domain Name System (DNS) web service offered by Amazon Web Services (AWS). It provides secure and reliable routing to the end-users for websites, web applications, and services. Amazon Route 53 translates human-readable domain names (like www.example.com) into the numeric IP addresses (like 192.0.2.1) computers use to connect to each other. It also monitors the health and performance of your application and its endpoints.

14: What is Amazon Cloud Front?

Amazon CloudFront is a web service that speeds up the delivery of your dynamic, static, and streaming content to your customers. In addition, it is a content delivery network (CDN) that integrates with other Amazon Web Services (AWS) to give developers and businesses an easy way to distribute content to end users with low latency, high data transfer speeds, and no commitments.

Moreover, CloudFront delivers your content through a worldwide network of data centers called edge locations. When a user requests content that you’re serving with CloudFront, the user is routed to the edge location that provides the lowest latency (time delay), so content is delivered with the best possible performance.

15: What is Amazon Elastic Container Service (ECS)?

Amazon Elastic Container Service (ECS) is a fully managed container orchestration service that allows users to deploy and manage Docker containers on AWS infrastructure. Amazon ECS eliminates the need to install, operate, and scale your own container orchestration software, providing easy integration with other Amazon services, such as Amazon EC2 and Amazon ECR, to manage the full container lifecycle. With Amazon ECS, users can easily scale from one instance to thousands, allowing them to quickly and efficiently run containerized applications.

16: What is Amazon Elastic Kubernetes Service (EKS)?

Amazon Elastic Kubernetes Service (EKS) is a managed service that helps users run Kubernetes workloads across multiple Availability Zones, with a high degree of availability. It enables users to easily deploy, manage, and scale containerized applications using Kubernetes on the AWS Cloud.

With EKS, users can take advantage of the scalability, reliability, and availability of the AWS Cloud to run and manage their containerized applications. Furthermore, EKS provides an easy way for users to run Kubernetes applications on AWS with automated patching, management, and scaling.

17: What is Amazon Lambda?

Amazon Lambda is an event-driven, serverless computing platform provided by Amazon Web Services (AWS). Additionally, it is a compute service that runs code in response to events and automatically manages the compute resources required by that code.

Moreover, it is used to build data-driven applications and services that respond quickly to new information. AWS Lambda can be used for a variety of tasks, such as image or object recognition, data processing, and content management.

18: What is Amazon AppStream 2.0?

Amazon AppStream 2.0 is a fully managed, secure application streaming service that allows you to stream desktop applications from AWS to any device running a web browser, without rewriting them. In addition, it eliminates the need to manage the infrastructure traditionally required to support desktop applications and provides users with instant access to the applications they need, across multiple devices.

19: What is AWS Glue?

AWS Glue is a fully managed extract, transform, and load (ETL) service that makes it easy for customers to prepare and load their data for analytics. Subsequently, AWS Glue can discover a data repository’s structure, populate the AWS Glue Data Catalog, and automate the extract, transform, and load (ETL) processes for a variety of data sources and targets.

All in all, AWS Glue is serverless, so there is no infrastructure to manage, and customers pay only for the resources consumed while running ETL jobs.

20: What is AWS CloudFormation?

AWS CloudFormation is a service that helps you model and set up your Amazon Web Services resources so that you can spend less time managing those resources and more time focusing on your applications that run in AWS.

Moreover, CloudFormation allows you to use a template to create a collection of related AWS resources, provision them in an orderly and predictable fashion, and manage them as a single unit.

Top 20 AWS Interview Questions and Answers [2026 Details]

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