The answer is to set up Cloud CDN with the Cloud Storage bucket as origin. This configuration reduces latency by caching video files at Google’s global edge locations, so users stream content from the nearest point of presence rather than fetching it from the original bucket, drastically cutting round-trip time. On the Google Professional Cloud Developer exam, this scenario tests your understanding of Cloud CDN as a latency reduction layer for static content like media files, often paired with Cloud Storage. A common trap is assuming you need to migrate to a different storage class or use multi-regional buckets alone, but those don’t provide edge caching. The key insight is that Cloud CDN handles the geographic distribution automatically, leaving your storage architecture unchanged. Memory tip: think “CDN = Cache Distributes Near” — the edge cache brings the data closer to the user, not the other way around.
PCD Practice Question: Designing highly scalable, available, and reliable cloud-native applications
This PCD practice question tests your understanding of designing highly scalable, available, and reliable cloud-native applications. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A media streaming company uses Cloud Storage to store video files. Users upload files through a web application, and the files are streamed directly from Cloud Storage. They want to reduce latency for users in different regions. Which configuration should they apply?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set up Cloud CDN with the Cloud Storage bucket as origin.
Cloud CDN caches video content at edge locations worldwide, reducing latency for users by serving content from the nearest edge cache instead of the origin Cloud Storage bucket. This directly addresses the requirement to reduce latency for users in different regions without modifying the storage architecture.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Enable Object Lifecycle Management to move objects to Nearline storage.
Why it's wrong here
Lifecycle Management changes storage class, not latency. Nearline has lower cost but higher access latency.
✗
Configure Cloud Storage transfer service to replicate data to multiple buckets.
Why it's wrong here
Transfer service is for moving data between sources, not for optimizing delivery latency.
✗
Use a multi-region Cloud Storage bucket and enable requester-pays.
Why it's wrong here
A multi-region bucket improves regional durability but does not cache; requester-pays affects billing, not latency.
✓
Set up Cloud CDN with the Cloud Storage bucket as origin.
Why this is correct
Cloud CDN caches content at edge locations worldwide, reducing latency for users regardless of their region.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that multi-region buckets alone solve latency issues, but the trap here is that multi-region storage provides redundancy, not edge caching—only Cloud CDN delivers the low-latency performance needed for global streaming.
Detailed technical explanation
How to think about this question
Cloud CDN uses Google's global edge network (over 150+ points of presence) to cache content based on cache-control headers. For video streaming, you can set a long TTL (e.g., 3600 seconds) to maximize cache hits, and Cloud CDN supports HTTP/2 and QUIC for reduced connection overhead. In a real-world scenario, a user in Tokyo streaming from a bucket in us-central1 would see latency drop from ~100ms to under 10ms with a CDN edge in Tokyo.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Designing highly scalable, available, and reliable cloud-native applications — This question tests Designing highly scalable, available, and reliable cloud-native applications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set up Cloud CDN with the Cloud Storage bucket as origin. — Cloud CDN caches video content at edge locations worldwide, reducing latency for users by serving content from the nearest edge cache instead of the origin Cloud Storage bucket. This directly addresses the requirement to reduce latency for users in different regions without modifying the storage architecture.
What should I do if I get this PCD question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
This PCD 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 PCD exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.