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AWS Interview Questions and Answers

1. Define Amazon Web Services or AWS.

A: According to the terminology, AWS or Amazon Web Services is defined as a platform that is designed to provide secure cloud services, computing power to clients, database storage options, content delivery and many other services that are all intended towards business development and growth.

2. List out the main components of AWS.

A: Similar to other Cloud Services in the industry, AWS too has been designed in a structured manner and has several key components. Mentioned below is the list of the same:

Amazon Route 53: This is a DNS (Domain Name Service) web service.

Easy Email Service: This service allows customers and clients to address email utilization through normal SMTP or RESTFUL API.

Access Management and Identity: This has been designed in order to provide heightened identity control and protection for a client’s AWS account.

S3 or Simple Storage Device: It is a very well-known utility among all the AWS Services and is mainly used in warehouse equipment.

EC2 or Elastic Compute Cloud: This is a utility designed to manage variable workloads and gives clients the ability to afford on-demand computing sources for hosting.

EBS or Elastic Block Store: This particular utility is used to expand beyond EC2 and is designed to connect EC2 to enable the lifespan of data beyond the capacities of EC2.

Cloud Watch: This is mainly a crisis management utility and is designed to help managers inspect and obtain additional resources in the light of a crisis.

3. Explain what S3 is?

A : S3 stands for Simple Storage Service. You can use S3 interface to store and retrieve any amount of data, at any time and from anywhere on the web.  For S3, the payment model is “pay as you go.”

4. What is AMI?

A: AMI stands for Amazon Machine Image.  It’s a template that provides the information (an operating system, an application server, and applications) required to launch an instance, which is a copy of the AMI running as a virtual server in the cloud.  You can launch instances from as many different AMIs as you need.

5. Mention what the relationship between an instance and AMI is?

A: From a single AMI, you can launch multiple types of instances.  An instance type defines the hardware of the host computer used for your instance. Each instance type provides different computer and memory capabilities.  Once you launch an instance, it looks like a traditional host, and we can interact with it as we would with any computer.

6. What does an AMI include?

A: An AMI includes the following things

  • A template for the root volume for the instance
  • Launch permissions decide which AWS accounts can avail the AMI to launch instances
  • A block device mapping that determines the volumes to attach to the instance when it is launched

7. How can you send a request to Amazon S3?

A: Amazon S3 is a REST service, and you can send a request by using the REST API or the AWS SDK wrapper libraries that wrap the underlying Amazon S3 REST API.

8. Mention what the difference between Amazon S3 and EC2 is?

A: The difference between EC2 and Amazon S3 is that

  • It is a cloud web service used for hosting your application
  • It is a data storage system where any amount of data can be stored
  • It is like a huge computer machine which can run either Linux or Windows and can handle application like PHP, Python, Apache or any databases
  • It has a REST interface and uses secure HMAC-SHA1 authentication keys

9. How many buckets can you create in AWS by default?

A: By default, you can create up to 100 buckets in each of your AWS accounts.

10. List out the different services offered by cloud computing.

A: There have been a number of public and private cloud platforms developed these days. All of these are composed of several services/layers of cloud computing. Mentioned below is a list of the same:

PaaS: It is the acronym for Platform as a Service.

IaaS: It is the acronym for Infrastructure as a Service.

SaaS: It is the acronym for Software as a Service.

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