Google PCA Designing for Security and Compliance Practice Question
This PCA practice question tests your understanding of designing for security and compliance. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 company is deploying a multi-tenant SaaS application on GKE. Each tenant's data must be isolated at the network level. They want to use a single GKE cluster but ensure that pods from different tenants cannot communicate with each other. Which GCP feature should they use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Kubernetes Network Policies
Kubernetes Network Policies allow you to define rules for pod-to-pod communication within a cluster, enabling tenant isolation. GKE Sandbox provides stronger isolation at the kernel level but is not specifically for network isolation. VPC Service Controls are for Google Cloud services, not pod-level. Istio can also provide network control but is a more complex mesh.
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.
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Istio service mesh
Why it's wrong here
Istio can also enforce network policies but is more complex than native Kubernetes Network Policies.
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VPC Service Controls
Why it's wrong here
VPC Service Controls apply to Google Cloud services, not pod-to-pod communication.
✓
Kubernetes Network Policies
Why this is correct
Network Policies can restrict pod-to-pod traffic based on labels and namespaces, providing tenant isolation.
Related concept
Read the scenario before looking for a memorised answer.
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GKE Sandbox
Why it's wrong here
GKE Sandbox uses gVisor for kernel-level isolation, not network policies.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PCA question in full detail.
Identify which PCA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Designing for Security and Compliance — This question tests Designing for Security and Compliance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Kubernetes Network Policies — Kubernetes Network Policies allow you to define rules for pod-to-pod communication within a cluster, enabling tenant isolation. GKE Sandbox provides stronger isolation at the kernel level but is not specifically for network isolation. VPC Service Controls are for Google Cloud services, not pod-level. Istio can also provide network control but is a more complex mesh.
What should I do if I get this PCA question wrong?
Identify which PCA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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