Introduction AWS S3 Interview Question & Answer

Preparing for AWS s3 interview? You are at the correct destination, Our guide on AWS s3 interview questions and answers will help you crack the interview effortlessly. In this blog, we have listed AWS s3 interview questions and answers prepared by industry professionals so that you can master your interview.

What is AWS?

The most extensive and widely used cloud platform in the world, with around 200 fully-featured services available from data centres all over the world is the Amazon Web Services (AWS). Cloud is an irresistible technology serving the ultimate solution to access IT software and systems. It has become a fundamental catalyst for Enterprise Organizations that are in search of Digital Transformation. AWS user database is an umbrella for the fastest-growing startups, Government agencies, and large corporations.

Before listing down the interview questions and answers, highlighting some of the important facts about Amazon Web Services:

  • Massive sites such as Quora, Reddit, and Netflix have been hosted on AWS.
  • An Azure S3 engineer earns up to $15Lakhs approximately in a year.
  • There are a minimum of 1 million active AWS clients in 190 countries.
  • AWS S3 holds a market share of 8.08%, having over 356,606 companies using the software for their Enterprise Data Storage.

The aforementioned points make it crystal clear that the demand for AWS S3 professionals is on a hike. We are certain that the AWS S3 interview questions and their answers will assist you in clearing the interview and bagging off your dream job.

Most Frequently Asked AWS S3 interview questions and answers

Q1. What is the use of AWS S3

Ans. Amazon S3 (Simple Storage Service) is an object storage service provided by AWS which provides industry-leading extensibility, data availability, security, as well as performance. Besides, it allows users to store and retrieve any amount of data at any time from any location on the internet.

Q2. What are the components of S3?

Ans. Listing below the components of AWS Simple Storage Service:

  • Buckets 
  • Objects
  • Keys

Buckets are containers for objects which are stored in Amazon S3, and each object is identified by a key.

Q3. What is the maximum object size that can be uploaded to Amazon S3?

Ans. The maximal object size that can be uploaded on Amazon S3 is 5 terabytes.

Q4. What is the difference between Amazon S3 and EBS?

Ans. Amazon S3 is an object storage service that is ideal for storing and retrieving large amounts of data, while Amazon EBS (Elastic Block Store) offers block-level storage volumes to use with Amazon EC2 instances, on one hand S3 is suitable for storing backups, static files, and multimedia files, while on the other hand EBS is used as a block-level storage device.

Q5. Explain the different storage classes in Amazon S3.

Ans. Amazon S3 provides various storage classes, which includes:

  • Standard Intelligent-Tiering
  • Standard-Infrequent Access (Standard -IA)
  • One Zone-Infrequent Access (One Zone-IA)
  • Glacier

Every storage class is designed for its different use cases, which offers varying levels of availability, durability and cost.

Q6. Mention the difference between Amazon S3 and Amazon Glacier?

Ans. Amazon S3 is designed to frequently access data, whereas Amazon Glacier is designed to achieve and backup long-term data. Glacier provides lower storage cost but with longer time taken for retrieval when compared to S3.

Q7. How can one secure data in S3?

Ans. The data in S3 is secured using different methods, such as access control lists (ACLs), s3 bucket policies, and IAM policies. In addition to that, S3 assists server-side encryption, client-side encryption, and SSL connections for data transfer.

Q8. Elaborate the Cross-Region Replication feature in S3.

Ans. Cross-region replication is a factor that automatically replicates data from one S3 bucket to another in a different AWS region. It assists in maintaining data durability and availability across various geographical locations.

Q9. How can one improve the performance of Amazon S3?

Ans. The performance of S3 can be improved by using the ideal storage class for data, by implementing multi-part uploads for large objects, and by utilising Amazon CloudFront as a content delivery network (CDN) to cache often accessed content.

Q10. What is the maximum number that can be created in an AWS account?

Ans. The maximal number of S3 buckets that can be created per AWS account is 1000 by default. The limit can be increased by requesting a service limit increase from AWS support.


 In conclusion, in addition to these questions, it’s important to have hands-on experience with S3 and be familiar with other AWS services, as S3 often assimilates with other AWS services in real-world scenarios