Summary of "AWS Interview Questions And Answers 2025 | Top 30 AWS Interview Questions | Intellipaat"

Summary of "AWS Interview Questions And Answers 2025 | Top 30 AWS Interview Questions | Intellipaat"

This video by Intellipaat provides a comprehensive guide to the top 30 AWS interview questions categorized into three difficulty levels: easy, medium, and hard. The content covers fundamental AWS concepts, services, architecture, security, cost optimization, and disaster recovery, with detailed explanations and analogies to simplify understanding.

Main Ideas, Concepts, and Lessons:

Introduction & Context

Easy Module (Basic Concepts & Services)

  1. What is AWS?
    • AWS is a cloud computing platform offering on-demand infrastructure without on-premise hardware.
    • Pay-as-you-go pricing.
    • Popular services: EC2, Lambda (compute), S3, EBS (storage), RDS, DynamoDB (databases), Route 53 (DNS), IAM (security), SageMaker (ML).
  2. Key Components of AWS+Amazon+S3+storage+course&tag=dtdgstoreid-21">Amazon S3
    • Stores data in buckets (globally unique names).
    • Objects inside buckets contain data + metadata.
    • Keys uniquely identify objects (like file paths).
    • Supports versioning and encryption (server/client-side).
  3. Types of Cloud Computing Models
    • IaaS (Infrastructure as a Service): Rent raw infrastructure (e.g., EC2).
    • PaaS (Platform as a Service): Rent a platform to deploy apps (e.g., Elastic Beanstalk).
    • SaaS (Software as a Service): Use fully managed software (e.g., Office 365, Zoom).
  4. AWS+Amazon+EC2+beginner+guide&tag=dtdgstoreid-21">Amazon EC2 Overview
    • Virtual servers rented on-demand.
    • Choose size, power, and pay only for usage.
  5. Stopping vs Terminating EC2 Instances
    • Stop: Temporarily shut down, instance persists, IP may change.
    • Terminate: Delete instance and storage permanently.
  6. Availability Zones and Regions
    • Region: Geographically isolated area (like a city).
    • Availability Zone: Isolated data centers within a region (like neighborhoods).
    • AWS has 34 regions and 108 availability zones globally.
  7. AWS+Elastic+Load+Balancer+tutorial+book&tag=dtdgstoreid-21">Elastic Load Balancer (ELB)
    • Distributes incoming traffic across multiple servers.
    • Ensures high availability and fault tolerance.
    • Health checks route traffic only to healthy servers.
  8. Horizontal vs Vertical Scaling
    • Horizontal: Add/remove instances (scale out/in).
    • Vertical: Increase/decrease instance capacity (scale up/down).
  9. AWS+IAM+security+course&tag=dtdgstoreid-21">AWS IAM (Identity and Access Management)
    • Controls who (users, roles) can access what (AWS resources).
    • Provides granular permissions and temporary access.
  10. Security Groups vs Network ACLs
    • Security Groups: Stateful, instance-level firewall (like room-level security).
    • Network ACLs: Stateless, subnet-level firewall (like building-level security).
    • Security groups track allowed traffic; ACLs check rules on every request.

Medium Module (Intermediate Concepts)

  1. Amazon Route 53
    • DNS service translating domain names to IP addresses.
    • Supports latency-based routing directing users to the nearest/least busy server.
    • Ensures high availability and low latency.
  2. AWS+Lambda+online+course&tag=dtdgstoreid-21">AWS Lambda
    • Serverless compute service running code in response to triggers.
    • Pay only for execution time.
    • No server provisioning or management needed.
  3. AWS CloudFormation
    • Infrastructure as Code service.
    • Create templates (JSON/YAML) to define and replicate AWS resources/configurations.
    • Ensures consistent infrastructure deployment.
  4. Difference Between Amazon SQS and SNS
    • SQS: Message queuing service (one-to-one communication, FIFO).
    • SNS: Pub/Sub notification service (one-to-many broadcasting).
    • Often used together for reliable message delivery.
  5. AWS+Amazon+RDS+database+course&tag=dtdgstoreid-21">Amazon RDS
    • Managed relational database service.
    • Automates patching, backups, scaling, monitoring, and high availability.
    • Supports multiple database engines (MySQL, PostgreSQL, Oracle, SQL Server).
  6. AWS Well-Architected Framework
    • Best practices for building secure, reliable, efficient, and cost-effective systems.
    • Five pillars: Operational Excellence, Security, Reliability, Performance Efficiency, Cost Optimization.
  7. Elastic IP
    • Static public IPv4 address that remains constant even if the instance is restarted.
    • Prevents downtime caused by IP changes.
  8. AWS Elastic Beanstalk
    • PaaS for easy deployment and management of applications.

Category ?

Educational

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