Question 239 of 1,446
Manage a solution that can span multiple database technologies →mediumMultiple ChoiceObjective-mapped
PCDE Practice Question: Manage a solution that can span multiple database technologies
A data analytics company uses Bigtable for high-throughput writes. They notice that some rows are receiving a disproportionate number of reads and writes, causing performance degradation. Which tool should they use to identify and resolve this hot spotting issue?
⚠ Common exam trap
It's easy for candidates to confuse Cloud Monitoring (general metrics) with Key Visualizer (specialized Bigtable access pattern analysis), assuming any monitoring tool can diagnose hot spots, but only Key Visualizer provides the key-level heatmap required for this specific Bigtable issue.
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
✓
Key Visualiser
Key Visualizer is the correct tool because it is specifically designed to analyze Bigtable access patterns and visualize hot spotting—where a small number of rows or row ranges receive a disproportionate share of reads and writes. It provides heatmaps and time-series graphs that pinpoint the exact keys causing performance degradation, enabling you to redesign your row keys or implement salting to distribute load evenly.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
cbt tool
Why it's wrong here
The cbt CLI tool can read and write data but does not provide visual analysis of hot spots.
- ✗
Cloud Logging
Why it's wrong here
Cloud Logging captures logs but does not provide a heatmap of row access.
- ✓
Key Visualiser
Why this is correct
Key Visualiser is the correct tool to identify hot spotting by visualising row key access patterns.
- ✗
Cloud Monitoring
Why it's wrong here
Cloud Monitoring provides metrics but not a visual heatmap of row access patterns.
Visual reference
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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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