AWS Cheat Sheet & Exam Guide: Master Cloud Services & Certification Prep

Amazon Web Services (AWS) dominates the cloud market with a lead of over 30% in 2020, far ahead of competitors like Microsoft Azure. This comprehensive guide offers a concise reference to AWS services, cloud computing fundamentals, and an exam roadmap for the most sought‑after certifications: AWS Certified Solutions Architect – Associate (SAA‑C02) and AWS Certified Cloud Practitioner.

What Is Cloud Computing?

Cloud computing delivers on‑demand, scalable compute, storage, and networking resources over the internet, eliminating the need for on‑premises data centers. With pay‑as‑you‑go pricing, businesses can rapidly provision virtual data centers, access data anywhere, and scale resources to match demand.

Common Cloud Deployment Models

• Infrastructure as a Service (IaaS) – Rent virtual servers, storage, and networking.
• Platform as a Service (PaaS) – Add developer tools and runtime environments to IaaS.
• Software as a Service (SaaS) – Deliver applications over the web (e.g., Netflix, Gmail, Salesforce).

Cloud Service Models

• Public Cloud – Shared resources on a pay‑per‑use basis.
• Private Cloud – Dedicated infrastructure managed internally or by a provider.
• Hybrid Cloud – Combines public and private layers for flexibility and control.

Why Choose AWS?

AWS offers a broad portfolio of services that are flexible, cost‑effective, and designed for high availability. From compute and networking to analytics and machine learning, AWS powers millions of applications worldwide.

Key AWS Service Categories

Compute & Auto‑Scaling

• EC2 – Scalable virtual servers.
• Auto‑Scaling – Automatic capacity adjustments based on defined policies.
• Elastic Load Balancing – Distributes traffic across multiple instances.
• Lambda – Serverless compute triggered by events.
• Elastic Beanstalk – Simplifies deployment and management of web apps.

Networking

• VPC – Isolated virtual network.
• Direct Connect – Dedicated network links to AWS.
• Route 53 – Scalable DNS service.

Storage & Content Delivery

• S3 – Durable object storage.
• EFS – Network file system for EC2.
• Glacier – Low‑cost archival storage.
• CloudFront – Global CDN for fast content delivery.
• Snowball – Physical device for large data transfers.

Databases

• RDS – Managed relational databases.
• DynamoDB – Scalable NoSQL database.
• ElastiCache – In‑memory caching.
• Redshift – Fully managed data warehouse.
• DMS – Database migration service.

Analytics & AI

• EMR – Big‑data processing.
• Kinesis – Real‑time data streaming.
• QuickSight – Business intelligence dashboards.
• AWS Machine Learning – Build and deploy ML models.

Security & Identity

• IAM – Fine‑grained access control.
• Inspector – Automated security assessment.
• WAF – Protects web applications.
• KMS – Key management and encryption.

Management & Monitoring

• CloudWatch – Metrics and logs.
• CloudTrail – Auditing and compliance.
• CloudFormation – Infrastructure as code.
• Trusted Advisor – Best‑practice recommendations.

Developer & DevOps Tools

• CodeCommit – Managed Git repositories.
• CodeDeploy – Automated deployments.
• CodePipeline – Continuous delivery.

Mobile & Enterprise Services

• Mobile Hub – Build, test, monitor mobile apps.
• Pinpoint – Mobile analytics and messaging.
• WorkSpaces – Desktop as a Service.
• WorkDocs – Secure collaboration.
• WorkMail – Business email with robust security.

AWS Certified Solutions Architect – Associate (SAA‑C02) Exam Guide

Passing the SAA‑C02 validates your ability to design secure, scalable, and cost‑effective AWS solutions. The exam tests practical knowledge across four domains:

• Design Resilient Architectures – 30%
• Design High‑Performing Architectures – 28%
• Design Secure Applications – 24%
• Design Cost‑Optimized Architectures – 18%

To succeed, you should have at least one year of hands‑on experience designing distributed systems on AWS, familiarity with core services, and a deep understanding of best practices for security, reliability, and cost management.

Exam Structure

• Multiple‑choice and multiple‑response questions.
• No negative marking.
• Unscored items may appear to gather statistics.
• Scoring ranges from 100 to 1000; the passing score is 720.

After the exam, you’ll receive a score report highlighting performance by domain, enabling you to focus on areas for improvement.

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