About This Domain
Domain 1 — Designing and Planning — accounts for ~26% of the PCDBE certification exam. This domain evaluates your understanding of cloud sql vs spanner vs alloydb, firestore vs bigtable, schema design best practices, and related concepts. Database design and service selection. To pass this section you need practical knowledge of how these services and patterns work together in real-world architectures.
What You'll Be Tested On
- Cloud SQL vs Spanner vs AlloyDB
- Firestore vs Bigtable
- Schema design best practices
- Capacity planning
Key Google Cloud Services in This Domain
Study Strategy for Domain 1
This domain represents ~26% of the total exam, making it a significant scoring area. Balance theoretical study with hands-on practice.
Exam Tips for Domain 1
AlloyDB = PostgreSQL-compatible + Spanner-like performance. Know when to choose it.
Frequently Asked Questions
How many questions on the PCDBE exam come from Domain 1?
Domain 1 (Designing and Planning) makes up ~26% of the PCDBE exam, approximately 16 questions.
What services should I focus on for Domain 1?
Key services include Designing Databases.
How should I prepare for Designing and Planning questions?
Start by reviewing the key topics listed above, then practice with domain-specific questions. Focus on understanding real-world scenarios.
What's the best order to study the PCDBE domains?
Many candidates start with the highest-weighted domains first: Designing and Planning (~26%), Managing and Administering (~21%), Migrating Data (~21%), Monitoring and Troubleshooting (~21%), Security and Compliance (~11%).
Practice Domain 1 Questions
Test your knowledge of Designing and Planning with practice questions from our PCDBE question bank.
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