Question 557 of 1,446
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 is building a real-time leaderboard for a mobile game using Google Cloud. The data includes player scores that update frequently (thousands of writes per second) and queries for top 100 players. Which database is most suitable?
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 Bigtable
Cloud Bigtable is a good fit for high write throughput and simple range scans (e.g., scanning top scores). Firestore has limited write capacity. Cloud SQL cannot handle thousands of writes per second. Spanner can but is overkill and more expensive.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
BigQuery
Why it's wrong here
BigQuery is for analytics, not real-time leaderboard updates.
- ✓
Cloud Bigtable
Why this is correct
Bigtable can handle high write volumes and read the top 100 rows efficiently via a prefix scan.
- ✗
Cloud Firestore
Why it's wrong here
Firestore write limit is 10,000 writes/sec per database, but it is optimized for document queries, not high-throughput leaderboards.
- ✗
Cloud SQL (PostgreSQL)
Why it's wrong here
Cloud SQL cannot sustain thousands of writes per second consistently.
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Last reviewed: Jul 4, 2026
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.
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