Amazon Web Services, a cloud computing service from Amazon.com, offers scalable, inexpensive and reliable cloud services to enterprises and individuals. As per reports, AWS holds a market share of 41.43% and offers a lot of career opportunities for aspirants having a flair for AWS development. Here are the most frequently asked AWS interview questions to help you crack AWS interview comfortably.
1. What is AWS?
AWS stands for Amazon Web Services and is a cloud computing service by eCommerce giant Amazon. The platform provides secure database storage, compute power, content delivery, and other cloud services to help businesses expand.
2. What are the key components of AWS?
Key components of Amazon Web services (AWS) are:
- Route 53
- Simple E-mail serve
- Identity and Access Management
- Simple Storage Device
- Elastic Compute Cloud
- Elastic Block Store
3. What is Amazon SQS?
Amazon SQS acts as a mediator between two controllers. It is a fully managed message queuing service that enables us to decouple and scale microservices, distributed systems, etc.
4. How is buffer used in AWS?
Buffer makes the system robust and also manages traffic received by different components. As the requests are processed in an imbalanced way, components also start working at the same speed for faster services are balanced in the presence of buffer.
5. What are the different services offered in Cloud Computing?
Both 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 stands for Platform as a Service.
IaaS: It stands for Infrastructure as a Service.
SaaS: It stands for Software as a Service.
6. Which Amazon cloud-based storage system allows us to store data objects ranging in size from 1 byte up to 5GB?
Amazon S3 cloud-based storage system allows us to store data objects from 1 byte up to 5GB. Storage containers in S3 are often referred to as buckets.
7. Which operation is used to retrieve the newest version objects?
GET operation is used to retrieve the newest version of an object and this can also be used for archiving and reserving data as well.
8. How is a request sent to Amazon S3?
Amazon S3 is a rest service the request is sent via REST API or AWS SDK wrapper libraries used to wrap the Amazon S3 REST API.
9. What is auto-scaling and how does it work?
Auto-scaling provides allows us to configure and automatically stipulate and alter new instances without any operator intervening. Another way of doing this is by setting edges and measurements to screen.
As soon as these edges cross another instance based on our preference, the auto-scaling takes place and instances are spun up, rolled, and configured into the load balancer pool.
10. What is Server Load Balancing?
Server Load Balancing or SLB looks after the performance of the network. It also delivers content by implementing a series of priorities and algorithms which response to the precise network requests. It distributes the clients to servers and ensures that they are sent to the correct servers too.
11. What are the challenges in microservices debugging and troubleshooting?
Debugging and troubleshooting are carried out using the log error and warning messages logged in CloudWatch.
12. What are the types of instances available in AWS?
Types of instances available in AWS are:
- Storage optimized
- Accelerated computing
13. What are the layers of Cloud architecture?
- SC– Storage controller
- CC– cluster controller
- NC– Node controller
- CLC– cloud controller
14. How is the Pricing of the S3 is decided?
The pricing for S3 is decided by consideration of the following factors:
- Data transfer
- Storage used
- Number of requests
- Transfer acceleration
- Storage management
15. What is SimpleDB?
SimpleDB is a data repository of structure record and encourages data doubts. Indexing both S3 and EC2 are called SimpleDB.
16. What is Amazon ElasticCache?
Amazon Elasticcache is a web service which makes it easy to deploy, scale and store data in the cloud.
Lambda is an Amazon compute service which allows us to run code in the AWS Cloud without managing servers.
18. Name the types of AMI provided by AWS
The types of AMI provided by AWS are:
- Instance store backed
- EBS backed