Design innovative, scalable, and highly available cloud database solutions →easyMultiple ChoiceObjective-mapped
PCDE Practice Question: Design innovative, scalable, and highly available cloud database solutions
A company needs a fully managed, relational database with strong consistency and global distribution for a travel booking application that supports high concurrency and ACID transactions. Which Google Cloud database should they choose?
⚠ Common exam trap
Candidates often mistakenly think that Cloud SQL can be globally distributed by using read replicas, but read replicas do not provide strong consistency or ACID transactions across regions, which is a critical requirement for this scenario.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Cloud Spanner
Cloud Spanner is the correct choice because it is a fully managed, globally distributed relational database that provides strong consistency and ACID transactions across regions, making it ideal for high-concurrency travel booking applications that require global distribution and transactional integrity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Cloud SQL
Why it's wrong here
Cloud SQL is regional, not globally distributed.
- ✓
Cloud Spanner
Why this is correct
Spanner provides global strong consistency and ACID transactions.
- ✗
Cloud Bigtable
Why it's wrong here
Bigtable is NoSQL, not relational.
- ✗
Firestore
Why it's wrong here
Firestore is document-based, not relational.
Go deeper
Related to this question
About these practice questions
This PCDE question is part of Courseiva's 1,446-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCDE practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCDE exam.