In previous article, I have mentioned jQuery Interview Questions and Answers,now in this article, I have provided common Amazon Web Service (AWS) S3 Interview Questions with answers.


What is Amazon S3 and it's use?

Amazon Simple Storage Service (Amazon S3) is an object storage service offering industry-leading scalability, data availability, security, and performance.

You can store any type of file on the Amazon S3 cloud object storage service.

So, you can store and retrieve any type of file on amazon s3 cloud, you can makes these files publicly available or only available to your organization.

What is S3 Lifecycle management?

To manage your objects on S3, so that they are stored cost effectively throughout their lifecycle, configure their Amazon S3 Lifecycle.

An S3 Lifecycle configuration is a set of rules that define actions that Amazon S3 applies to a group of objects.

There are two types of actions: Transition actions and Expiration action.

You can set a lifecycle transition policy to automatically migrate objects stored in the S3 Standard storage class to the S3 Standard-IA, S3 One Zone-IA, and/or S3 Glacier storage classes based on the age of the data.

What is Amazon S3 Storage Lens?

Amazon S3 Storage Lens provides organization-wide visibility into object storage usage and activity trends, as well as actionable recommendations to improve cost efficiency and apply data protection best practices.

What is bucket in AWS S3?

An Amazon S3 bucket is a public cloud storage resource available in Amazon Web Services(AWS) Simple Storage Service (S3), an object storage service. Amazon S3 buckets, same as file folders, store objects, which contain data and its descriptive metadata.

How to create Amazon S3 Bucket using CLI?

If you have correct permission for user, you can use below command (create-bucket) to create S3 bucket

aws s3api create-bucket --bucket my-bucket --region us-east-1

in the above CLI command, 'my-bucket' is the name of bucket and we are creating bucket in us-east-1 region.

Note: To create a bucket, you must register with Amazon S3 and have a valid Amazon Web Services Access Key ID to authenticate requests. Anonymous requests are never allowed to create buckets. By creating the bucket, you become the bucket owner.

What are the storage class available in Amazon s3?

Storage classes available with Amazon s3 are:

  • Amazon S3 standard
  • Amazon S3 standard-infrequent Access
  • Amazon S3 Reduced Redundancy Storage
  • Amazon Glacier

How to Delete a S3 Bucket using CLI?

You can use the "delete-bucket" command

aws s3api delete-bucket --bucket "your-bucket-name" --region "your-region".

How to download entire S3 Bucket using CLI?

You can simply use the below format to download entire S3 bucket

aws s3 sync s3://<source_bucket> <local_destination>

for example:

aws s3 sync s3://mybucket

will download all the objects in mybucket to the current directory.

OR, You can simply use s3cmd command

s3cmd --configure
s3cmd sync s3://bucketnamehere/folder /destination/folder

How do you allow a user to gain access to a specific bucket?

You can follow the below-provided steps to provide access to specific 

  • Categorize your instances
  • Go to IAM Role in AWS Console
  • Create or Edit user.
  • Lockdown Tags of tags
  • Attach IAM policies to IAM users, related to buckets

Will you use encryption for S3?

It is good to consider encryption for delicate information on S3 as it is a restrictive innovation.

We can also block public access or manage access to files, according to information, stored on S3.

Can S3 be cast-off with EC2 instances, in case of "Yes" please specify How?

Yes, it can be cast off for instances with root approaches backed by native occurrence storage. By using Amazon S3, developers have access to the similar extremely scalable, dependable, fast, low-priced data storage substructure that Amazon uses to track its worldwide network of websites.

You can also use S3, for websites hosted on EC2 to load stationary content from S3.

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