Amazon Web Services (AWS) is the widely accepted cloud computing platform across the globe. It has acquired millions of customers all over the world, which ranges from giant organizations to medium and small size startups. AWS is the most significant market player in cloud providers with a market share of 32%. Which clearly shows that the professionals who are capable of handling AWS applications would also have high demand and employment opportunities in the market.

We have collected a group of AWS Interview Questions And Answers which are frequently asked in any AWS interview. We hope these group questions will help you in cracking the interview and landing the dream career that you have always admired. If in case you have faced any AWS interview earlier and haven't found the same questions here, then feel free to comment on those questions in the comment section. We will update them in this blog at the earliest.  Let’s get into the questions and answers part.

Amazon AWS vs Microsoft Azure
Area AWS Azure
Security AWS Shield DDos Protection Service
DB migration DB Migration available as preview service Azure also provides DB Migration
NoSQL Dynamo DataBase Azure Cosmos DataBase
Content delivery network CloudFront Azure Content Delivery NW
Container instances EC2 Container Service (ECS) Azure Container Service
Programmatic access Command Line Interface Azure Command Line Interface (CLI)
Batch computing AWS Batch Azure Batch
Read More @ AWS Vs Azure
Q1) What is Amazon Web Services? 

Ans: AWS stands for Amazon Web Services, which is a cloud computing platform. It is designed in such a way to provide cloud services in the form of small building blocks, and these blocks help create and deploy various types of applications in the cloud. These sequence of small blocks are integrated together to deliver the services in a highly scalable manner. 

Q2) Explain what S3 is all about?

Ans: S3 is abbreviated as simple storage service. It is used for storing and retrieving data at any time and anywhere on the web. S3 makes web-scale computing easier for developers. The payment mode of S3 available on a pay as you go basis.  

Q3) What are the main components of AWS?  

Ans: The key components of AWS are:  

  • Simple Email service: It allows you to send the send emails with the help of using regular SMTP or by using a restful API call   
  • Route 53: it’s a DNS web service.
  • Simple Storage Device S3: It is a widely used storage device service in AWS Identity and Access management 
  • Elastic compute cloud( EC2): it acts as an on-demand computing resource for hosting applications. EC2 is very helpful in time of uncertain workloads. 
  • Elastic Block Store: it allows you to store constant volumes of data which is integrated with EC2, which will enable you to data persist. 
  • Cloud watch: it allows you to watch the critical areas of the AWS with which you can even set a reminder for troubleshooting. 

[Related Blog: AWS Elastic Beanstalk]

Q4) What is AMI: 

Ans: It stands for Amazon Machine Image. The AMI contains essential information required to launch an instance, and it is a copy of AMI running in the cloud.  You can download as many examples as possible from multiple AIM’s. 

Q5) Explain the relationship between an instance and AMI is? 

Ans: Using a single AIM, you can download as many instances as you can.  An instance type is used to define the hardware of the host computer for your situation. Each instance is unique and provides the facilities in computational and storage capabilities. Once you install an instance, it looks similar to a traditional host with which we can interact in the same way we do with a computer.  

Q6) What are the things that are included in the AIM?  

Ans: An AIM consists of the things which are mentioned below

  • A template for the instance 
  • Launch permissions 
  • A block mapping which decides the volume to be attached when it gets launched.
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Q7) What is the procedure to send a request to Amazon S3? 

Ans: S3 in Amazon is a RESt service, and you can send requests by using the AWS SDK or REST API wrapper libraries. 

Q8) What are the key pairs? 

Ans: Key pairs act as a guard to make your login process secured into instances/virtual machines. To login to the devices, we use both keys, which are a public key and private key.

Q9) What are the pricing models available for EC2 instances? 

Ans: Different pricing models available for EC2 models are below mentioned ones. 

  • On-demand 
  • Spot
  • Dedicated 
  • Reserved 
  • Scheduled 
Q10) Explain the types of instances available? 

Ans: Below stated are the available instances: 

  • General-purpose 
  • Storage optimized 
  • Accelerated computing
  • Computer-optimized 
  • Memory-optimized 
Q11)  Will it be possible to scale the instances in AWS? If yes, how? 

Ans: Yes! It is possible in AWS to stop the instances. To do so, we need to stop the server and then make the change instance type and then start the server. 

Q12) Explain about DynamoDB? 

Ans: If you want to have a faster and flexible NoSQL database, then the right thing available is DynamoDB, which is a flexible and efficient database model available in Amazon web services.

[Related Blog: Pricing concepts in AWS]

Q13) Explain the process to secure the data for carrying in the cloud? 

Ans: One thing that must be taken into consideration is that no one should size the data while it is moving from one point to another. The other thing to consider is there should not be any kind of leakages with the security key form the multiple storerooms in the cloud. Dividing the information into different types and by encrypting it into the valid methods could help you in securing the data in the cloud. 

Q14) What are the layers available in cloud computing? 

Ans: Below listed are the various layers of cloud computing

  • SaaS: Software as a Service 
  • PaaS: Platform as a Service
  • IaaS: Infrastructure as a Service
Q15) Explain the layers of Cloud architecture? 

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Ans: We have five different types of layers available, which are

  • SC- Storage controller 
  • CC- cluster controller 
  • NC- Node controller 
  • Walrus
  • CLC- cloud controller
Q16) What are the reserved instances? 

Ans: It is nothing but a reservation of resources for one or three years and utilized whenever you need. The reservation comes on a subscription basis available for a term of 1 year and three years. The hourly rate goes down as the usage increases.  Purchasing reservation not just associated with the reservation of resources but also it comes with the capacity that is required for a particular zone.    

Q17) What is meant by cloud watch? 

Ans: Cloud watching is a monitoring tool in Amazon Web Services with which you can monitor different resources of your organization.  You can have a look at various things like health, applications, network, etc. 

Q18) How many types of cloud watches do we have?  

Ans: We have two types in cloud watch, which are essential monitoring as well as detailed monitoring. The necessary tracking will come to you at free of cost, but when it comes to detailed control, you need to pay for it.  

Q19) Explain the cloud watch metrics that are meant for EC2 instances? 

Ans: The available metrics for EC2 instances are Disk reads, CPU utilization, network packetsOut, CPUCreditUsage, Disk writes, network packetsIn, networkOut, CPUCreditBalance. 

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Q20) What would be the minimum and maximum size of the individual objects that you can store in S3? 

Ans: The minimum size of the object that you can store in S3 is 0 bite, and the maximum size of an individual object that you can save is 5TB.

Q21) Explain the various storage classes available in S3? 

Ans: Below mentioned are the storage classes available in S3. 

  • Standard frequency accessed 
  • One-zone infrequency accessed 
  • RRS - reduced redundancy storage
  • Standard infrequency accessed 
  • Glacier.  
Q22) What is Glacier?

Ans: The Glacier is the backup tool available in amazon web services to retrieve or back up the data in S3.

Q24) What are the methods to encrypt the data in S3? 

Ans: We have three different methods available for encrypting the data in S3, which are as follows.

  • Server Side Encryption - C 
  • Server Side Encryption - S3 
  • Server Side Encryption - KMS       
Q25) On what basis Pricing of the S3 is decided? 

Ans: The pricing for S3 is decided by taking into consideration below topics. 

  • Data transfer 
  • Storage used 
  • Number of requests
  • Transfer acceleration 
  • Storage management 
Q26) Is the property of broadcast or multicas rted by Amazon VPC? t supported by Amazon VPC?  

Ans: No, at present, Amazon VPC is not supporting any multicast or broadcast. 

Q27) How many IP addresses are allowed for each account in AWS?

Ans: For each AWS account, 5 VPC elastic addresses are allowed. 

Q28) What is meant by Edge location?

Ans: The actual content is cached at these places called edge location. So whenever a user searches for the content, he will find the same at the edge locations. 

Q29) What is Snowball?  

Ans: Snowball is an option available in AWS to transport. Using snowball, one can transfer the data into the AWS and out of it. It helps us in transporting massive amounts of data from one destination to another. It helps in lowering the networking expenditure.  

Q30) What is Redshift? 

Ans: Redshift is a big data product used as a data warehouse in the cloud. It is the fast, reliable and powerful product of big data warehouse.

[Related Blog: Big Money With AWS Certification]

Q31) Explain the advantages of auto-scaling? 

Ans: Below listed are the advantages of autoscaling 

  • Better availability 
  • Better cost management 
  • High fault-tolerant 
Q32)What is subnet? 

Ans: When a large amount of IP addresses are divided into small chunks, then these tiny chunks are called as Subnets. 

Q33) What is the number of subnets that we can per VPC?  

Ans: Under one VPC you can have 200 subnets.  

Q34) What is the purpose of AWS CloudTrail?

Ans: It is a tool specially designed and dedicated to for logging and tracking IP calls. It also helps us in auditing all S3 bucket access.  

Q35) What is meant by Elasticache?

Ans: Elasticache is a web service which makes the path easier to deploy and store the data in the cloud easily.  

Q36)Explain about AWS Lambda?

Ans: AWS Lambda is a computational service that enables you to run code without maintaining any servers. It automatically executes the code whenever needed. You are required to pay for the time that you have used it for. Lambda enables you to run the code virtually for any kind of application without managing without any servers.  

Q37) What are the Types of AMI Provided by AWS?

Ans: Below listed are the two kinds of AMIs provided by AWS which are: 

  • EBS backed 
  • Instance store backed
Q39) What is Geo Restriction in CloudFront?

Ans: It is an important feature available in AWS, which helps you in preventing the users from accessing the content from specific regions. CloudFront is useful for distributing the content only on desired locations. 

Q40) What is Amazon EMR?

Ans: Amazon EMR is a survived cluster stage it helps you to create data structures before the intimation. Big data technologies such as Apache Hadoop and Spark are the tools which enable you to investigate a large amount of data. You can use the data for making analytical goals by using the apache hive and other relevant open source technologies.      

Q41) What is the actual boot time taken to instance stored-backend AMI? 

Ans: It takes less than 5 minutes to store the instance-backed AMI. 

Q42) What are the various types of Load Balancers available in AWS? 

Ans: There are two types of load balancers available in AWS which are 

  • Classic load balancer 
  • Application Load Balancer 
Q43) Explain the essential features of Amazon cloud search? 

Ans: Below listed are the essential features of Amazon cloud search.  

  • Prefixes Searches 
  • Enter text search 
  • Boolean searches
  • Range searches 
  • Autocomplete Advice   
Q44) Give a few examples of DB engines which are used in AWS RDS? 

Ans:

  • MariaDB 
  • OracleDB
  • MS-SQL DB
  • MYSQL DB 
  • Postgre DB
Q45) Explain the advantages of cloud computing? 

Ans: Many advantages arise because usage of cloud; some of them are: 

  • Scalability 
  • High availability 
  • Go global in no time
  • Pay for what you use 
  • Elasticity 
  • Increased speed and agility. 
Q46) What is the security group? 

Ans: In AWS the in and out traffic to instances are controlled with virtual firewalls which are known as Security groups. Security groups allow you to control traffic based on various aspects such as protocol, port and source destination.      

Q47) What is the difference between block storage and file storage? 

Ans:

  • Block Storage: it functions at a lower level and manages the data asset of blocks. 
  • File Storage: The file storage operates at a higher level or operational level and manages data in the form of files and folders.    
Q48) Explain the types of Routing policies available in Amazon route 53? 

Ans:

  • Latency-based 
  • Weighted 
  • Failover 
  • Simple 
  • Geolocation  
Q49) List the default tables that we get when we create AWS VPC? 

Ans:

  • Network ACL 
  • Security group 
  • Route table 
Q50) List the different ways to access AWS?

Ans: We have three different ways to access AWS such as 

  • Console 
  • SDK
  • CLI  
Q51) What are the EBS volumes? 

Ans: The EBS is abbreviated as an Elastic Block Stores. These blocks act as a persistent volume which can be attached to the instances. The EBS volumes will store the data even if you stop the instances. 

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