PCNE Configuring Network Services Practice Question
A company uses a Global HTTPS Load Balancer with Cloud CDN. They need to purge specific cached objects for all users immediately after a content update. Which method should they use?
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
✓
Cache invalidation
Cache invalidation allows purging specific URLs or URL prefixes from Cloud CDN caches.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Delete the objects from the backend bucket
Why it's wrong here
Deleting from backend does not purge cached copies.
- ✗
Use signed URLs
Why it's wrong here
Signed URLs control access but do not purge cache.
- ✗
Reduce TTL on the origin
Why it's wrong here
Reducing TTL will eventually expire cache but not immediately.
- ✓
Cache invalidation
Why this is correct
Correct: cache invalidation immediately removes specified objects from cache.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCNE 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 PCNE exam.