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Top AWS Interview Questions & Answers
If you are looking forward towards clearing the interview rounds in AWS then the following interview questions will help you get through the door. However, in addition to having knowledge of these questions, having hands-on and real-life exposure to AWS projects through is a must so as to ultimately crack the interview rounds & secure a career in AWS.
- Name The Various Layers Of The Cloud Architecture?
There are 5 layers and are listed below
- CC- Cluster Controller
- SC- Storage Controller
- CLC- Cloud Controller
- Walrus
- NC- Node Controller
- Explain accessing of data on EBS in AWS?
Elastic block storage as the name indicates provides persistent, highly available and high performance block level storage that can be attached to a running EC2 instance. The storage can formatted and mounted as a file system or the raw storage can be accessed directly.
- Mention what the key components of AWS are?
The key components of AWS are:
Route 53:A DNS web service
Simple E-mail Service- It allows sending e-mail using RESTFUL API call or via regular SMTP
Identity and Access Management- It provides enhanced security and identity management for your AWS account
Simple Storage Device or (S3)- It is a storage device and the most widely used AWS service
Elastic Compute Cloud (EC2)- It provides on-demand computing resources for hosting applications. It is handy in case of unpredictable workloads
Elastic Block Store (EBS)- It offers persistent storage volumes that attach to EC2 to allow you to persist data past the lifespan of a single Amazon EC2 instance
CloudWatch- To monitor AWS resources, It allows administrators to view and collect key Also, one can set a notification alarm in case of trouble.
- List Out The Main Components Of AWS?
The major components involved in AWS are
- Amazon Route 53
- Easy Email Service
- Access Management and Identity
- S3 or Simple Storage Device
- EC2 or Elastic Compute Cloud
- EBS or Elastic Block Store
- Cloud Watch
- Explain Any Two Components Involved In Amazon Web Services?
AWS comprises of 4 components.
Amazon S3: For retrieving the key information occupied in creating cloud structural design and amount of produced information also can be stored in this component
Amazon EC2 instance: Supports running large distributed system on the Hadoop cluster. Automatic parallelization and job scheduling can be achieved by this component.
The other two components are Amazon SQS & Amazon SimpleDB
- Explain What AWS Is?
Amazon Web Services is shortly referred to as AWS. It is developed by the Amazon ecommerce based web company offering remote computing services to the users. AWS offers its cloud computing services in the IaaS platform.
- Explain S3
S3 simply stands from Simple Storage Service. The purpose of S3 interface is to help in storing and retrieving the data. User can store & retrieve the data at anytime & from anywhere on the web.
What is AMI?
Amazon Machine Image is shortly referred to as AMI. AMI is a template that provides the information (an operating system, an application server, and applications) which is very much essential to launch an instance. It enables its users to launch instances from as many different AMIs as they need.
- Mention What The Relationship Between An Instance And AMI Is?
With a single AMI user can launch multiple types of instances. Based on the type of instance it defines the hardware of the host computer used for user instance. Different computer & memory capabilities are delivered by each of the instance.
- What Does An AMI Include?
An AMI includes the following things
- A template for the root volume for the instance
- Includes the launch permissions that decides which AWS accounts can avail the AMI to launch instances
- It also include a block device for mapping that determines the volumes to attach to the instance when it is launched
- How Can You Send A Request To Amazon S3?
Amazon S3 is a REST service, user can send request by using the REST API or the AWS SDK wrapper libraries that wrap the underlying Amazon S3 REST API.
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- List Out The Different Services Offered By Cloud Computing
A number of public and private cloud platforms offer several services/layers of cloud computing. Here below is the list of services
- 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
- What is Amazon EC2 Root Device Volume?
Whenever a developer launches an instance, the root device volume has the image that was used to boot up the instance in the first place.
There are two types of AMIs or Amazon Machine Images that are available:
EBS based storage, and
Instance store-backed AMI
- Tell About The Security Group In Amazon EC2
Security of the cloud network is protected by Security groups in Amazon EC2. They are used for controlling both the inbound as well as outbound traffic & forms high level firewall.
- What is Cross Region Replication?
Cross Region Replication is a service available in AWS with which it can replicate the data from one bucket to another bucket within the same or a different region.
It supports asynchronous copying of objects which is nothing but the objects are not copied immediately.
- What Are Regions & Availability Zones in AWS?
Regions- In Amazon Web Services, a region can be interpreted as a geographical area which consists of 2 or more availability zones. It is more like a collection of data centers which are completely isolated from other regions.
Availability Zones- An Availability zone in AWS is a data center which can be present anywhere in your country or probably within your city. It may have multiple servers, switches, firewalls, load balancing. The things through which you can interact with the cloud reside inside the Data center.
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