AWS S3 interview questions

AWS S3 is a cloud-based storage service that is offered by Amazon. S3 stands for Simple Storage service that is designed to make web-scale computing easier for developers. Here you can read Best Interview questions on AWS S3 that are asked during interviews.

#1 Question

Explain AWS S3 bucket?

Amazon S3 (Simple Storage Service) is a simple web service interface that allows huge amount of data storage and retrival from anywhere from the internet.Its provides developers highly scalable, reliable, fast and low cost data storage infrastructure.

#2 Question

What is the maximum size of S3 bucket?

In S3 bucket you can store unlimited volume of data and number of objects. A single Amazon S3 objects can be a size of range 0 bytes to 5 terabytes. In single upload request You can put an object of around 5 GB but you must have to enable Multipart Upload capability.

#3 Question

How to list objects of a S3 bucket?

use aws s3 ls --recursive command on aws CLI to list all files or objects under the specified directory or prefix

#4 Question

Explain process of mounting s3 to ec2 instance?

Follow below steps to mount s3 to ec2 instance

1. Update the system

apt-get update

2. Install the dependencies

sudo apt-get install automake autotools-dev fuse g++ git libcurl4-gnutls-dev libfuse-dev libssl-dev libxml2-dev make pkg-config

3. Clone s3fs source code from git

  git clone

4. Run below commands to change source code directory, compile and install the code.

cd s3fs-fuse
./configure --prefix=/usr --with-openssl
sudo make install

5. Run s3fs command to check where command is placed

which s3fs

6. Get your access key and secret key ready.

7. Create a new file in /etc with the name passwd-s3fs and paste your access key and secret key.

touch /etc/passwd-s3fs
vim /etc/passwd-s3fs

8. Change the permission of the file

sudo chmod 640 /etc/passwd-s3fs

9. Now create a directory or provide the path of an existing directory and mount S3bucket in it.

mkdir /mys3bucket
s3fs your_bucketname -o use_cache=/tmp -o allow_other -o uid=1001 -o mp_umask=002 -o multireq_max=5 /mys3bucket

#5 Question

How to install aws s3 cli?

Prerequisite to install AWS CLI.

  • Python2 version 2.6.5+ or Python3 version 3.3+

  • Windows, Linux, macOS,or Unix

After that, if you are using Unix or Linux system run below command to install AWS CLI

 pip install awscli --upgrade --user

For window and other OS please read:

#6 Question

How to clear AWS S3 cache?



#7 Question

How to delete a AWS s3 bucket?

#8 Question

How to get AWS S3 access key?

#9 Question

What are options available for protecting data at rest in Amazon S3?

#10 Question

Explain S3 Versioning? What are benefits of using versioning in S3.

#11 Question

How to Configure Versioning on a Bucket?

#12 Question

How to enable Multipart Upload capability in Amazon S3.



#13 Question

What is AWS s3fs.

It is a FUSE filesystem. Amazon web services simple storage service supports it. It can be operated with two different methods

1.Command method-

In this type of mode, s3fs is eligible for managing Amazon s3 buckets in several efficient methods.

2. Mount method-

It is used to mount the Amazon s3 bucket as a local file system.

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