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Cloud Basics · Question Set
AWS Core Concepts interview questions for placements and exams.
Questions
14
Included in this set
Subject
Cloud Basics
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Difficulty
Mixed
Level of this set
Go through each question and its explanation. Use this set as a focused practice pack for Cloud Basics.
AWS Lambda runs functions in response to triggers like API calls or S3 uploads. You pay only for compute time used — perfect for serverless architectures.
Amazon VPC (Virtual Private Cloud) allows you to define custom private networks with subnets, routing, and firewalls. It’s the foundation for secure app hosting in AWS.
Amazon CloudWatch monitors resource metrics like CPU, memory, and storage. You can set alarms and visualize trends for better operational insight.
Amazon EC2 (Elastic Compute Cloud) provides scalable virtual machines called instances. You can choose CPU, memory, and storage configurations to deploy apps easily.
AWS follows the pay-as-you-go model for most services. You pay only for actual usage of compute, storage, or bandwidth without long-term contracts.
EC2 instances come in families like General Purpose, Compute Optimized, Memory Optimized, and GPU instances. You choose types based on workload — for example, t2.micro for low-cost apps or c5.large for CPU-heavy tasks.
AWS CloudTrail captures API activity across your account. It helps track changes, security audits, and user actions for compliance.
An AWS Region is a cluster of data centers called availability zones. Each region is independent to support redundancy and disaster recovery.
CloudWatch monitors performance metrics like CPU, memory, and disk utilization. CloudTrail records user activity and API calls. CloudWatch is about system health; CloudTrail is about accountability and security.
Amazon S3 (Simple Storage Service) stores objects like images, videos, and backups. It’s highly durable and accessible via REST APIs from anywhere.
AWS IAM (Identity and Access Management) controls user authentication and authorization. You can create users, roles, and policies to define who can access what.
S3 has classes like Standard, Infrequent Access, Glacier, and Intelligent-Tiering. Standard is for frequent access, IA for backups, and Glacier for archiving long-term cold data at very low cost.
IAM policies are written in JSON format and include statements defining actions, resources, and effects (Allow or Deny). You can attach policies to users, groups, or roles for fine-grained access control.
A VPC includes subnets, route tables, internet gateways, NAT gateways, and security groups. These components work together to manage routing, connectivity, and isolation inside the AWS network.
For complete preparation, combine this set with full subject-wise practice for Cloud Basics. You can also explore other subjects and sets from the links below.