Top questions with answers asked in MNC on AWS

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AWS (Amazon Web Services) interview questions along with their answers:

  1. What is AWS, and what are its main services?
    • Answer: AWS (Amazon Web Services) is a comprehensive cloud computing platform provided by Amazon. It offers a wide range of services and tools for computing power, storage, networking, databases, analytics, machine learning, artificial intelligence, Internet of Things (IoT), security, and more. Some of the main services offered by AWS include:
      • Compute Services: Amazon EC2 (Elastic Compute Cloud), AWS Lambda, Amazon ECS (Elastic Container Service).
      • Storage Services: Amazon S3 (Simple Storage Service), Amazon EBS (Elastic Block Store), Amazon Glacier.
      • Database Services: Amazon RDS (Relational Database Service), Amazon DynamoDB, Amazon Redshift.
      • Networking Services: Amazon VPC (Virtual Private Cloud), Amazon Route 53, AWS Direct Connect.
      • Analytics Services: Amazon EMR (Elastic MapReduce), Amazon Athena, Amazon Kinesis.
  2. What is Amazon EC2, and how does it work?
    • Answer: Amazon EC2 (Elastic Compute Cloud) is a web service provided by AWS that allows users to rent virtual servers (known as instances) on the cloud. EC2 instances can be launched, scaled, and terminated as needed, providing flexible and scalable computing capacity. To use Amazon EC2, users select an Amazon Machine Image (AMI) to define the operating system and software configuration of the instance, choose an instance type based on their computing requirements, and configure security settings and storage options. Once launched, EC2 instances can be accessed remotely using SSH (Linux) or Remote Desktop (Windows).
  3. What is Amazon S3, and how is it used?
    • Answer: Amazon S3 (Simple Storage Service) is a scalable object storage service provided by AWS for storing and retrieving data on the cloud. S3 is designed to provide high durability, availability, and scalability for storing a wide range of data types, including images, videos, documents, backups, and application data. S3 uses a simple web services interface to enable developers to store and retrieve data from anywhere on the web. S3 buckets (containers for storing objects) can be created and managed using the AWS Management Console, AWS CLI (Command Line Interface), or SDKs (Software Development Kits) for various programming languages.
  4. What is AWS Lambda, and how does it work?
    • Answer: AWS Lambda is a serverless computing service provided by AWS that allows users to run code in response to events without provisioning or managing servers. With Lambda, users can upload their code (written in languages such as Node.js, Python, Java, or C#) and specify the events that trigger its execution, such as changes to data in Amazon S3 buckets, updates to DynamoDB tables, or HTTP requests to API Gateway endpoints. Lambda automatically scales the execution of code in response to incoming events, ensuring that the code runs reliably and cost-effectively without the need for manual intervention.
  5. What is Amazon RDS, and what are its benefits?
    • Answer: Amazon RDS (Relational Database Service) is a managed relational database service provided by AWS that makes it easy to set up, operate, and scale relational databases in the cloud. RDS supports several popular database engines, including MySQL, PostgreSQL, MariaDB, Oracle, and Microsoft SQL Server. Some benefits of Amazon RDS include:
      • Managed Service: AWS handles routine database administration tasks such as provisioning, patching, backups, and monitoring, allowing users to focus on application development.
      • Scalability: RDS supports horizontal and vertical scaling to accommodate growing workloads and performance requirements.
      • High Availability: RDS offers built-in high availability features such as automated backups, multi-AZ (Availability Zone) deployments, and read replicas to ensure data durability and fault tolerance.
      • Security: RDS provides robust security features, including network isolation, encryption at rest and in transit, IAM (Identity and Access Management) integration, and database authentication and authorization mechanisms.