Skip to content

AWS Database Specialty (DBS-C01) Study Strategy

Study Approach

Phase 1: Database Fundamentals (Weeks 1-2)

  1. Relational Databases - RDS engines, Aurora architecture, storage, replication
  2. NoSQL Databases - DynamoDB data modeling, GSI/LSI, capacity modes
  3. Purpose-Built - DocumentDB, Neptune, Keyspaces, QLDB, Timestream
  4. Caching - ElastiCache Redis vs Memcached, DAX
  5. 📖 RDS User Guide
  6. 📖 Aurora User Guide
  7. 📖 DynamoDB Developer Guide

Phase 2: Operations and Migration (Weeks 3-4)

  1. DMS and SCT - Migration types, CDC, heterogeneous conversions
  2. High Availability - Multi-AZ, read replicas, Aurora Global Database
  3. Backups - Automated backups, PITR, snapshots, Aurora Backtrack
  4. Management - Parameter groups, maintenance, Performance Insights
  5. 📖 DMS User Guide
  6. 📖 SCT User Guide

Phase 3: Security and Monitoring (Week 5)

  1. Encryption - KMS, TDE, in-transit SSL, encrypting existing databases
  2. Authentication - IAM DB auth, Secrets Manager rotation, RDS Proxy
  3. Network - VPC, security groups, private subnets, VPC endpoints
  4. Monitoring - CloudWatch metrics, Enhanced Monitoring, Performance Insights
  5. Audit - Database Activity Streams, CloudTrail, pgAudit
  6. 📖 RDS Security
  7. 📖 Secrets Manager

Phase 4: Exam Prep (Week 6)

  1. Practice scenario-based questions
  2. Review database selection decision tree
  3. Focus on migration workflows and troubleshooting
  4. Take practice exams and review weak areas

Primary Resources

Hands-On Practice

  • Deploy RDS Multi-AZ and test failover
  • Set up Aurora Global Database with cross-region replication
  • Build a DynamoDB table with GSI and test hot partition behavior
  • Run a DMS migration from RDS MySQL to Aurora MySQL
  • Configure RDS Proxy with Lambda
  • Enable and analyze Performance Insights on a loaded database
  • Set up Secrets Manager rotation for RDS credentials

Exam Tactics

Keywords to Watch For

  • "Active-active multi-region" - DynamoDB Global Tables
  • "Cross-region DR with < 1 sec RPO" - Aurora Global Database
  • "MongoDB compatible" - DocumentDB
  • "Cassandra compatible" - Keyspaces
  • "Immutable ledger" or "audit trail" - QLDB
  • "Time-series" or "IoT metrics" - Timestream
  • "Connection pooling for Lambda" - RDS Proxy
  • "Encrypt existing database" - Snapshot, copy encrypted, restore
  • "Rotate credentials" - Secrets Manager
  • "Tamper-proof audit" - Database Activity Streams
  • "Zero-downtime upgrade" - Blue-green deployment
  • "Different database engine migration" - SCT + DMS

Common Pitfalls

  • DynamoDB GSIs are always eventually consistent (no strong consistency option)
  • LSIs can only be created at table creation time
  • RDS encryption must be set at creation - cannot be added later
  • IAM database authentication is only for MySQL and PostgreSQL
  • PITR and snapshot restore always create a new DB instance (new endpoint)
  • Aurora Multi-Master was discontinued - do not select it as an answer
  • RDS Proxy only supports MySQL and PostgreSQL engines
  • Memcached has no persistence, replication, or failover

Time Management

  • 180 minutes for 65 questions - approximately 2.5 minutes per question
  • Database selection questions are usually straightforward - answer quickly
  • Migration scenario questions require more analysis - allocate extra time
  • Eliminate wrong answers by checking engine support and feature limitations

Readiness Indicators

  • You can select the correct database for any workload description
  • You understand Aurora vs RDS architecture differences
  • You know DynamoDB data modeling best practices
  • You can plan a heterogeneous migration with SCT and DMS
  • You understand all HA options (Multi-AZ, replicas, Global Database)
  • You know encryption workflows including encrypting existing databases
  • You can troubleshoot performance using Performance Insights
  • You understand Secrets Manager rotation strategies
  • You score 75%+ consistently on practice exams