- A
Use Cloud NAT for outbound traffic
Why wrong: NAT does not reduce egress.
- B
Use Cloud CDN to cache content
Reduces origin egress by serving from edge caches.
- C
Move instances to a lower-cost region
Why wrong: Egress pricing is similar across regions.
- D
Use Premium Tier networking
Why wrong: Premium Tier costs more for egress.
- E
Compress data before sending it
Smaller data size reduces egress volume.
Question 938 of 1,000
Google PCA Cloud CDN Practice Question
This PCA practice question tests your understanding of design and plan a cloud solution architecture. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: cloud CDN. 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.
Which TWO actions reduce egress costs when transferring data from Compute Engine to the internet? (Choose 2)
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
✓
Use Cloud CDN to cache content
Cloud CDN caches content at edge locations, reducing the amount of data served from the origin Compute Engine instance, thus lowering egress costs. Compressing data before transfer reduces the volume of data sent, directly decreasing egress costs. Cloud NAT does not affect egress costs; it only provides outbound connectivity. Moving instances to a lower-cost region does not reduce egress costs because egress pricing is similar across regions. Premium Tier networking typically increases costs due to higher per-GB charges.
Key principle: Cloud CDN
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use Cloud NAT for outbound traffic
Why it's wrong here
NAT does not reduce egress.
- ✓
Use Cloud CDN to cache content
Why this is correct
Reduces origin egress by serving from edge caches.
Related concept
Cloud CDN
- ✗
Move instances to a lower-cost region
Why it's wrong here
Egress pricing is similar across regions.
- ✗
Use Premium Tier networking
Why it's wrong here
Premium Tier costs more for egress.
- ✓
Compress data before sending it
Why this is correct
Smaller data size reduces egress volume.
Related concept
Cloud CDN
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often think Cloud NAT reduces egress costs, but it only enables outbound traffic without public IPs—it doesn't change data volume or pricing. Also, compression is sometimes overlooked because it may introduce latency, but it is a valid cost-saving method.
Trap categories for this question
Similar concept trap
Egress pricing is similar across regions.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Cloud CDN
- Data compression
- Egress costs
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
Cloud CDN
Real-world example
How this comes up in practice
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review cloud CDN, then practise related PCA questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this PCA question test?
Design and plan a cloud solution architecture — This question tests Design and plan a cloud solution architecture — Cloud CDN.
What is the correct answer to this question?
The correct answer is: Use Cloud CDN to cache content — Cloud CDN caches content at edge locations, reducing the amount of data served from the origin Compute Engine instance, thus lowering egress costs. Compressing data before transfer reduces the volume of data sent, directly decreasing egress costs. Cloud NAT does not affect egress costs; it only provides outbound connectivity. Moving instances to a lower-cost region does not reduce egress costs because egress pricing is similar across regions. Premium Tier networking typically increases costs due to higher per-GB charges.
What should I do if I get this PCA question wrong?
Review cloud CDN, then practise related PCA questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Cloud CDN
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Last reviewed: Jun 24, 2026
This PCA 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 PCA exam.
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