Amazon – AWS Interview Questions
Here is the list of AWS Interview Questions which are recently asked in Amazon company. These questions are included for both Freshers and Experienced professionals.
1. Explain what AWS is?
Amazon web service platform is a combination of infrastructure as a service (IaaS), platform as a service (PaaS) and packaged software as a service (SaaS) which produce cloud computing solutions with cost effectiveness, flexibility and so on.
2. Mention what the key components of AWS are?
The key components of AWS are Amazon storage (S3), Elastic Compute Store, Cloud Watch, EBS, DNS web service and Email service.
3. Explain what S3 is?
Amazon Simple Storage Service (Amazon S3) is storage which enables to store and retrieve any amount of data without any restriction for the Internet. It helps the web scale computing easier for developers.
4. What is AMI?
AMI extends as advanced metering infrastructure (AMI) which is an integrated system of various systems like communications networks, and data management that helps to acquire two-way communication between utilities and customers.
5. Mention what the relationship between an instance and AMI is?
Instance is a copy of AMI running as a virtual server in the cloud which can be launched from an AMI in which AMI is a template that contains a software configuration involving operating system, an application server, and applications.
6. What does an AMI include?
AWS includes EBS snapshots. Control permission launch, block device mapping which allows multiple instances to be created, to copy and deregister whenever needed.
7. How can you send a request to Amazon S3?
Requests can be sent to Amazon S3 using the AWS SDK wrapper libraries that wrap the Amazon S3 REST API to simplify the programming tasks in which interaction is either authenticated or anonymous.
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8. Mention what the difference between Amazon S3 and EC2 is?
An Amazon EC2 instance is like a remote computer running Windows or Linux to install whatever software users want, including a Web server running PHP code and a database server. Amazon S3 is a storage service used to store large binary files.
9. How many buckets can you create in AWS by default?
In AWS, 100 buckets can be created in each AWS account by default and can be increased to 1000 buckets based on the user requirement.
10. Explain can you vertically scale an Amazon instance? How?
The capacity of the EC2 instance can be increased using vertical scaling to manage the growing demands of the application .Vertical Scaling is done by adding more power e.g. CPU, RAM) up to 488 GB of RAM or 128 virtual cores to an existing machine.
11. Explain what T2 instances is?
T2 instances are Burstable Performance Instances that provide a baseline level of CPU performance with the ability to burst above the baseline. The baseline performance and ability to burst are governed by CPU Credits. T2 instances accumulate CPU Credits when they are idle, and consume CPU Credits when they are active.
12. Explain how the buffer is used in Amazon web services?
Buffer helps to synchronize different components, which gets requests and processes it in an unsynchronized way. It manages the balance between various components in order to maintain the speed and provide a faster service. In AWS buffer also ensures efficiency over traffic or load.
13. What are key-pairs in AWS?
A key pair consists of a private key and a public key which is a set of security credentials that helps to prove user identity to connect to an instance in which the public key is stored in Amazon EC2 and the users can store the private key instead of a password to securely access your instances.
14. What are the different types of instances?
The different types of instance can be categorised into general Purpose, Compute-Optimized, Memory-Optimized, Storage-Optimized, and Accelerated Computing.
15. What is VPC?
VPC stands for Amazon Virtual Private Cloud is a service which helps to launch AWS resources with IPv4 and IPv6 usage to ensure secure and easy access to a logically isolated virtual network in the private cloud.
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