2024 Best 51 AWS Interview Questions For Developers

If you’re looking forward to appearing for the interview for your dream developer role, go through these AWS Interview Questions For Developers.

The cloud computing world is clearly dominated by Amazon Web Services (AWS).

Quite amazingly, AWS occupies over one-third of the global cloud computing market, outplaying other market players like Google Cloud and Microsoft Azure by big numbers.

Given this popularity for AWS services, the demand for AWS developers is increasing exponentially.

However, this doesn’t mean that companies will hire anyone who appears for a developer interview.

To land an AWS developer position, you’ll need to be aware of the AWS platform inside out as well as demonstrate an ability to work in a team and communicate effectively.

Since the assets hosted by a firm’s AWS account can potentially affect every part of the company, developers might be expected to engage with a range of stakeholders, and do that impressively.

AWS Interview Questions For Developers

1. What Do You Understand by AWS?

This is among the most frequently asked AWS development questions that seek to evaluate your basic knowledge about AWS.

Try to stay to the point and straightforward when asking this question. Here is what your response should cover:

Also referred to as the cloud computing platform, Amazon Web Services (AWS) are a set of cloud computing services, including computing power, deployment, analytics, database storage, content delivery, and others directed toward business growth.

These services are inexpensive, secure, highly reliable, and scalable that work together to develop and empower highly advanced applications.

2. What Are the Various Elements of AWS?

When you’re asked this question, you’ll need to study the interviewer’s mind to determine whether they expect you to only name the components of AWS or provide their respective explanations too.

The major elements of AWS include:

  • Route 53: This is a DNS web service that happens to be quite scalable.
  • Elastic Compute Cloud (EC2): This is a central piece in the AWS ecosystem. It offers flexible and on-demand computing resources that you pay for using a “pay as you go” model.
  • Simple Storage Service (S3): This is a storage service that’s the most widely used AWS service.
  • CloudWatch: This enables the controller to outlook and collects the most important metrics as well as set alarms to alert them of any trouble.
  • Simple Email Service (SES): As a hosted transactional email service, SES enables users to seamlessly send out deliverable emails using a regular SMTP or through a RESTFUL API.
  • Elastic Block Store (EBS): It provides you with a storage solution that’s continuous and can be viewed as a regular hard drive in instances.
  • Identity and Access Management (IAM): IAM offers security management and improved identity for your AWS account.
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3. What Is Cache?

In the context of cloud computing, a cache refers to a storage layer that will temporarily store part of a data set.

This way, any future requests for that data can be served up much faster than otherwise. In other words, the caching process enables you to speedily access and use previously computed or retrieved data.

In a cache, the data is typically stored in Random-Access Memory (RAM) or another fast-access hardware, and a software component may be used in correlation with the data.

4. What Is an AMI and What Does It Include?

Expect a couple of questions about AMI during your AWS developer interview. Here is our take on the answer:

Amazon Machine Image or AMI refers to an AWS template that provides you with the necessary information for an instance’s launch.

The instance, in this case, acts as the copy of the AMI running in the cloud as a virtual server. Depending on their needs, users can launch from as many different AMIs as they need.

Moving on to what is included in an AMI, here is the list of items included:

  1. The root volume template designed for the current instance.
  2. Mapping for block device to compute the overall volume that will be appended to the instance when it’s ready to be launched.
  3. Launch permissions to figure out which accounts of AWS will receive the AMI for the purpose of launching instances.

5. How Does an AWS Instance Relate to AMI?

You can launch multiple types of instances from a single AMI. The kind of instance regulates the hardware of the host computer that is being used for that instance.

Different instance types have different memory and computing capabilities.

When you launch an instance, it serves as a host, and interaction with it is the same as with other computers except that you have fully controlled access to your instances.

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6. How Can an AWS Instance Be Scaled Vertically?

One of the best features of AWS and cloud virtualization is that you can vertically scale an AWS instance. When compared to the one you’re running, spin-up is a massive case.

What you need to do is push up the instance and detach the root EBS volume from the server and remove it.

Then, bring your live instance to a halt, and eliminate its root volume. Record the distinctive device ID, append root volume to the novel server and launch it again.

This is how you vertically scale an AWS instance.

7. What Are the Different Layers of Cloud Computing?

Cloud computing comprises four primary layers, including:

Platform as a Service (PaaS):

A PaaS service provider typically offers services like workflow engines, databases, emails, queues, etc. to customers, who in turn utilize these elements to build their own applications.

The service provider handles the platform and services, data backup, and availability of resources. This enables users to focus on the functionality of their applications.  

Software as a Service (SaaS):

SaaS providers offer end-user programs or applications to customers, with certain application-level admin capabilities and customization such as creation and management of users and use of brand colors, logos, etc.

Infrastructure as a Service (IaaS):

IaaS aims to provide users with the ability to provision storage, network connectivity, and processing on demand. Customers can build their own applications using the resources from this service model.

Desktop as a Service (DaaS):

This concept has to do with cloud-based desktop virtualization service, allowing customers to access their virtual applications and desktops on the go, using the device they have.

Offering a multi-tenancy environment, DaaS is typically subscription-based. The service provider deploys and manages the Virtual Desktop Infrastructure (VDI).   

8. How Is AWS S3 different from AWS EC2?

When preparing for your AWS developer interview, be sure to obtain an in-depth understanding of AWS S3 and EC2. There are several differences between AWS S3 and EC2:

  1.  S3 is referred to as the Simple Storage Service, while EC2 is labeled as the Elastic Compute Cloud.
  2. S3 is simply a service for storing data, where large binary files can be stored, while EC2 is a cloud web service that’s used to host the created application.
  3. AWS EC2 is capable and sufficient to run a server, while S3 doesn’t help in running a server.
  4. AWS S3 features a REST interface and leverages HMAC-SHA1 authentication keys that are highly secure. On the other hand, AWS EC2 is similar to a massive computer machine that can handle different databases such as Apache, Python, and PHP.
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9. What Are the Different Storage Options with EC2 Instances?

The AWS EC2 instance offers four storage options that include AWS EBS, S3, EC2 instance storage, and Adding storage. Let’s study them individually:

  • AWS EBS: AWS Elastic Block Store (EBS) is the block-level storage solution offered by Amazon. It’s used with the AWS EC2 to store data. Your EBS servers will retain the data even when you’ve shut down the EC2 instances.
  • AWS S3: Amazon’s simple storage service to store data.
  • AWS EC2: A web service interface that offers resizable compute capacity for your AWS cloud. It’s designed for developers to have full control over computing resources and web-scaling, including storage.
  • Adding Storage: This represents your ability to add more storage space, as per your needs.

What else to prepare and look for AWS developer interview

To sum it up, companies screening developer profiles for AWS-related vacancies don’t just consider the right professional credentials, but they also look for someone with a well-rounded personality and who can do well as part of a team.

The right candidate will have a decent networking background and should be able to understand the behavior and systems architecture of a DevOps firm.

Besides this, when making hiring decisions, AWS recruitment experts attach great importance to AWS certifications.

This is because many of their clients like to know how many AWS engineers working at the company are certified.

Plus, don’t assume that every interviewer will have read about your AWS certifications on your CV, profile, or other materials. When appropriate, do mention any relevant certifications you’ve acquired.


We truly hope that these AWS interview questions for developers help you prepare for the interview, land your dream AWS developer job, and move forward in your planned career path.

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