PDE Storing the Data Practice Question
A company wants to store backups of on-premises databases in Google Cloud for long-term retention. They need WORM (Write Once, Read Many) compliance and object-level retention policies. What should they use?
⚠ Common exam trap
Google often tests the distinction between bucket-level retention policies and object-level retention controls. Candidates may incorrectly assume a separate 'Object Lock' feature exists, but in Google Cloud, WORM compliance is implemented using Cloud Storage retention policies (bucket-level) combined with object retention and legal holds (object-level).
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 Storage with retention policies
Cloud Storage supports WORM (Write Once, Read Many) compliance through bucket retention policies and object retention (object-level retention lock), along with legal holds. A bucket retention policy sets a minimum retention period for all objects in the bucket, while object retention allows you to set or extend retention on individual objects, and legal holds prevent deletion or modification until removed. Together these provide the object-level retention controls required for long-term backup retention and regulatory compliance, making Cloud Storage with retention policies the correct choice.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Firestore backups
Why it's wrong here
Firestore is a database; no WORM feature for backups.
- ✗
Cloud Storage with Object Lock
Why it's wrong here
Object Lock provides per-object WORM retention, meeting compliance.
- ✗
BigQuery table snapshots
Why it's wrong here
BigQuery is for analytics, not backup storage; no WORM.
- ✓
Cloud Storage with retention policies
Why this is correct
Retention policies are bucket-level, not per-object. Object Lock is needed for WORM.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PDE 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 PDE exam.