AWS

 

What Is AWS And Why Is It So Popular?

Amazon Web Services (AWS) is an important cloud computing platform known for its wide service offerings. Its popularity is developed through its scalability, cost-effectiveness, and global infrastructure. Businesses increased the AWS to efficiently scale operations, reduce costs, and innovate rapidly.

 Explain The Key Components Of AWS.

AWS provides the fundamental components crucial for cloud computing:

Service

Description

EC2 (Elastic Compute Cloud)

Your virtual servers in the cloud. Need a Linux or Windows server for your web application? EC2 provides resizable compute capacity on demand.

S3 (Simple Storage Service)

The internet's storage locker. S3 offers highly scalable and durable object storage for everything from website files and backups to big data analytics.

RDS (Relational Database Service)

Managed database made easy. RDS simplifies the setup, operation, and scaling of popular relational databases like MySQL, PostgreSQL, and SQL Server.

IAM (Identity and Access Management)

Your security guard in the cloud. IAM allows you to securely control access to AWS services and resources, defining who can do what.

 

 

What Is An EC2 Instance And How Does It Work?

An EC2 instance is essentially a virtual server running in the AWS cloud. When you "launch" an EC2 instance, you're setting up a virtual machine with the operating system and software stack you've selected (e.g., a Linux server with Apache).

How it works: AWS maintains the physical hardware, and you provision virtual resources on top of it. You choose an Amazon Machine Image (AMI), which acts as a template containing the OS, application server, and any pre-installed software. You then select an instance type, which defines the CPU, memory, storage, and networking capacity of your virtual server, tailoring it to your specific computing needs.

 Describe The Difference Between S3 And EBS In AWS.

S3 ( Simple Storage Service ) is an object storage service suitable for storing various data types of files that can accessed through the internet. In contrast, EBS ( Elastic Block storage ) is a block-level storage attached to EC2 instances, offering persistent and high-performance storage for applications like databases. EBS provides the raw storage hardware helpful for I/O operations where as S3 comes with pre configured file system. For understanding think of S3 as a file storage system and EBS as a hard drive.

Feature

Amazon S3

Amazon EBS

Storage Type

Object Storage

Block Storage

Access

Via HTTP/HTTPS URLs

Mounted as a file system on an EC2 instance

Use Cases

Static content, backups, data lakes, archives

Operating systems, databases, application storage

File System

Pre-configured

Raw block device; you manage the file system

Persistence

Independent of EC2 instance lifecycle

Persistent, but tied to a specific Availability Zone

What Are Key-Pairs In AWS?

A key pair consists of two types of keys - a public key and a private key. The public key is used to encrypt data and stored on the AWS EC2 instance while a private key is used to decrypt data and is kept by the user.

What Is Elastic Load Balancing (ELB) And How Does It Function?

Elastic Load balancer ( ELB ) is a service provided by AWS that helps in distribution of incoming traffic of the applications across multi targets such as EC2 instances, containers etc.. in one or more Availability zones. It helps in improving fault tolerance and ensuring the utilization of resources, bringing high availability of the application by preventing a single node ( instance ) faulterance by improving application's resilience.

 

What Are The Various Load Balancers Provided By AWS?

The following are the types of load balancers provided by AWS:

  • Application Load Balancer: ALB works on layer 7(application layer) of OSI Model. It supports  HTTP, HTTPS, and gRPC protocols. and works on Round Robin algorithm.
  • Network Load Balancer: NLB works on layer 4(Transport layer) of OSI Model. It Supports TCP, UDP, and TLS protocols and works on Flow hash algorithm.
  • Gateway Load Balancer: GLB works on network layer (3 and 7).It supports IP-based routing and works on routing table lookup algorithm.

What Is Amazon RDS, And What Database Engines Does It Support?

Amazon RDS (Relational Database Service) is a managed relational database service provided by AWS. It takes care of the essential hardware infrastructure and supports multiple database engines such as MySQL, SQL Server, Oracle, PostgreSQL, and MariaDB. RDS simplifies database administration by automating tasks like backups, software patching, and scaling. 

 

Explain The Concept Of AWS Identity And Access Management (IAM).

IAM stands for Identity Access Management, a security AWS service that provides Authentication and Authorization to AWS services and resources. It involves in creating users, assigning permissions through policies, and then setting up the multi-factor authentication. 

How Many Subnets Can a VPC Contain?

By default a VPC can have up to 200 subnets.

What is An AMI In AWS and Why Is It Used?

An AMI (Amazon Machine Image) is like a blueprint used to create virtual computers (called EC2 instances) in AWS. It includes the operating system (such as Linux or Windows), any pre-installed software or applications, and configuration settings like storage and permissions. With the help of AMIs, we can easily launch new servers that have the exact setup we need.

What Is The Relationship Between Regions And Availability Zones in AWS?

AWS Regions are geographical areas, like cities or countries (for example, Mumbai or London). Inside each Region, there are smaller parts called Availability Zones (AZs).

An Availability Zone are data centers present in each AWS Region.

What Is The Maximum Size Of An Object In S3?

The maximum object size in Amazon S3 (Simple Storage Service) is 5 terabytes (5 TB).

What Is The Difference Between Vertical and Horizontal Scaling in AWS?

Vertical scaling refers to increasing the capacity of a single virtual machine like upgrading its CPU, RAM, or storage.
Horizontal scaling means adding more virtual machines to share the load, instead of relying on just one machine. This helps distribute CPU, RAM, and storage usage across multiple instances.

 How Do You Monitor And Log AWS Resources?

AWS comes up with providing services such as CloudWatch for monitoring and CloudTrail for logging. CloudWatch take place in monitoring the resources and applications, while CloudTrail will record the API calls, providing the visibility of user activity. These tools collectively allow detailed observation and analysis of AWS resources.

 Discuss The Use Of Amazon ECS (Elastic Container Service) In Container Management.Amazon ECS is a aws service helps with simplified container management by providing easy access to users to run and scale containerized applications. To improve the functionality it works with integration of other AWS services such as Elastic Load Balancing and CloudWatch. ECS supports both Fargate and EC2 instances services for better control over the underlying infrastructure.

Explain The Concept Of AWS Direct Connect.

AWS Direct Connect is an AWS service that helps in establishing direct network between on-premises and AWS Data centers.

 What Is AWS Snowball, And When Would You Use It?

AWS Snowball is an AWS serive that provides a physical data transport of large amount of data in and out of AWS. 

Discuss The Use of AWS CloudWatch In Monitoring Resources.

AWS CloudWatch helps in real time monitoring of AWS resources and applications. It collects and tracks metrics, sets alarms, and automatically responds to changes in resource utilization. CloudWatch Logs provides centralized log management on utilizing proactive monitoring, troubleshooting ensuring the optimal performance of AWS resources.

48. Discuss The Benefits Of Using Amazon CloudFront.

Amazon CloudFront is a content delivery network (CDN) service in AWS that speed up the delivery of web content using AWS Global network Infrasture.

Comments

Post a Comment

Popular posts from this blog

Archunit test

  ArchUnit  integrates nicely with the  JUnit  test framework, and so, they are typically used together.  All we have to do is add the  archunit-junit 5  dependency to match our  JUnit  version: < dependency > < groupId > com.tngtech.archunit </ groupId > < artifactId > archunit-junit5 </ artifactId > < version > 0.14.1 </ version > < scope > test </ scope > </ dependency > Step 1: The first step is to create a set of Java classes that will be checked for rules violations . We do this by instantiating the  ClassFileImporter  class and then using one of its  importXXX()  methods: JavaClasses jc = new ClassFileImporter () .importPackages( "com.baeldung.archunit.smurfs" ); Step 2:  Let’s try to implement the first rule defined above using this API. We’ll use the  classes()  method as our anchor and add additional constraints ...
Read more

Hexagonal Architecture

Image
Hexagonal Architecture: Hexagonal architecture is a model of  designing software applications around domain logic  to isolate it from external factors. In the domain layer, we keep the code that touches and implements business logic . This is the core of our application. This layer should be isolated from both the application part and infrastructure part. Through  the application layer, the user or any other program interacts  with the application. This area should contain things like user interfaces, RESTful controllers, and JSON serialization libraries. It includes anything  that exposes entry to our application, and orchestrates the execution of domain logic. Finally, the  infrastructure layer is the part that contains anything that the application needs to work,  such as database configuration or Spring configuration. It also implements infrastructure-dependent interfaces from the domain layer.    
Read more

visitor design pattern

Image
  The Visitor design pattern is a  behavioral pattern  that allows you to add new operations to a group of related classes without modifying their structures. Real-World Example of Visitor Design Pattern A simple example of the Visitor design pattern is in an online shopping cart. Imagine you have different items like books, electronics, and clothing. Each item can accept a visitor that performs actions like calculating the total price or applying discounts. This way, you can add new features without changing the item classes, making the system easier to maintain and update. UML Class Diagram of Visitor design pattern Components of Visitor Design Pattern The Visitor design pattern consists of several key components that work together to enable its functionality. Here’s a breakdown of these components: Visitor Interface : This interface declares a visit method for each type of element in the object structure. Each method is designed to handle a specific element type. Concr...
Read more