AWS Tutorials Training Certification And Interview Q & A:
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AWS Tutorials Training Certification And Interview Q & A

The questions & answers are divided into 3 levels for an easy read:

1. Basic
2. Intermediate
3. Advance

What is AWS?
AWS is an online platform that offers cloud computing solutions that are both scalable and cost-effective. AWS is a widely used cloud platform that helps businesses develop and thrive by providing on-demand services such as compute power, database storage, and content delivery.

What are the Main Components of AWS

1. Elastic Block Store: It integrates with EC2 and allows you to persist data by storing continuous quantities of data.
2. Simple Storage Device S3: In AWS(AWS Tutorials Training) Identity and Access Management, it is a widely used storage device service.
3. Simple Email Service: This service allows you to send emails using either normal SMTP or a restful API request.
4. Cloud watch: This feature allows you to monitor AWS’s critical areas and even create a troubleshooting reminder.
5. Elastic computes cloud (EC2): It is a computational resource that may be used to host applications on demand. EC2 comes in handy when workloads are unpredictable.

Compare between AWS and OpenStack

AWS

License: Amazon proprietary
OS: Dependent on cloud administrator
Networking: Users can connect to corporate servers using AWS’ DNS scalable route 53, Amazon ELB (Elastic Load Balancing), and Amazon VPC (Virtual Private Cloud) services.
Storage: Every cloud computing maintains 2 types of storage 1. Block storage 2. Object storage. Aws uses s3 for block storage & Cinder for object storage

Openstack

License: Open Source
OS: Provided by AMI
Networking: OpenStack’s LBaas (Load Balancer as a Service) and flat networks VLAN, on the other hand, provide for automatic and manual IP addresses and networks.
Storage: Open Stack uses Swift for block storage & EBS for object storage

What is the relationship between an instance and AMI

You can download as many instances as you want using a single AMI. The hardware of the host computer for your situation is defined by an instance type. Each instance is distinct, with its own set of computing and storage capabilities. Once installed, an instance resembles a typical host with which we can interact in the same way that we would with a computer.

How are Spot Instance, On-demand Instance, and Reserved Instance different from one another?

Spot stance
compute capacity needs no
terms & conditions to buy
spot price fluctuates on supply
and demand
The instance is acquired by Amazon
if its bidding is below the spot
price
charged hour on the hour
On-Demand Instance
End users can get the instance on demand
With pay a pay you model the demand instance are launched by end-users
Remains persistent
Charged on per-second basis

Intermediate Level

What are the types of load balancers in EC2?

Classic load balancer: is built to make routing decisions at the application or transport layer. The container instance port and the load balancer port must have a fixed relationship.

Network Load Balancer: A network load balancer is a device that makes judgments about routing at the transport layer. It is capable of processing millions of queries per second. After receiving a connection from the load balancer, AWS Tutorials Training NCL selects the target among the target groups using the flow hash routing method.

The application load balancer: is a device that makes routing decisions at the application layer. ALC enables path-based routing and dynamic host port mapping. AWS Tutorials Training

What are key pairs in AWS?
To encrypt and decrypt the login information AWS Tutorials Training , Amazon EC2 uses both public and private keys. The transmitter encrypts the data with a public key, while the recipient decrypts it with a private key. Key pairs are made up of private and public keys. The public key provides safe access to the instance, and a private key replaces the password.

How are you going to set up an Amazon [AWS Tutorials Training] S3 bucket to provide static files for your public web app?
By setting the bucket policy to allow all items to be read by the public.

What are the methods to encrypt the data in S3?
AWS Tutorials Training
We have 3 methods in encrypting the data in S3:-
Server-Side Encryption – C
Server-Side Encryption – S3
Server-Side Encryption – KMS

ADVANCE LEVEL

What is Snowball?
Snowball is a transport option accessible in AWS. Snowball can be used to transport data into and out of AWS. It aids in the transfer of large amounts of data from one location to another. It aids in the reduction of networking costs.

Give a few examples of DB engines that are used in AWS RDS?
Following are a few examples of DB engines AWS Tutorials Training
• OracleDB
• MariaDB
• Postgre DB
• MYSQL DB
• MS-SQL DB

Which service offered by Amazon will you choose if you want to collect and process e-commerce data for near real-time analysis? (Choose any two)
DynamoDB. DynamoDB is a fully managed NoSQL database service that accepts any unstructured data. As a result, DynamoDB is the best option for gathering data from e-commerce sites.

How many IP addresses are allowed for each account in AWS?
5 VPC elastic addresses for each AWS account 

Is it possible to alter an EC2 instance’s private IP address while it is running or stopped?
It is not possible to modify it. At the time of launch, an EC2 instance is issued a private IP address. This private IP address is tied to the instance for the duration of its existence and cannot be modified.