The answer is preconfigured OWASP Top 10 rules and custom rules with rate limiting based on IP. These are both valid Cloud Armor security policy types because Cloud Armor supports two distinct categories: preconfigured rules that map directly to the OWASP Top 10 web application vulnerabilities—such as SQL injection and XSS—which are managed and automatically updated by Google, and custom rules that allow you to define your own logic, including rate limiting based on source IP to mitigate DDoS or brute-force attacks. On the Google Professional Cloud Security Engineer exam, this question tests your understanding of Cloud Armor’s policy composition, often appearing in scenarios involving global external HTTP(S) Load Balancers; a common trap is confusing preconfigured rules with static rule sets, but remember that OWASP rules are dynamic and Google-managed. Memory tip: think “OWASP for automatic coverage, custom for control”—if you need to block by IP frequency, that’s a custom rule, not a preconfigured one.
PCSE Practice Question: Managing operations in a cloud solution environment
This PCSE practice question tests your understanding of managing operations in a cloud solution environment. 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 security engineer is configuring Cloud Armor to protect a global external HTTP(S) Load Balancer. Which TWO of the following are valid Cloud Armor security policies? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Preconfigured OWASP Top 10 rules
Option D is correct because Cloud Armor includes preconfigured rules that map directly to the OWASP Top 10 web application vulnerabilities, such as SQL injection and cross-site scripting (XSS). These rules are managed by Google and automatically updated to protect against the latest attack patterns, making them a valid security policy for a global external HTTP(S) Load Balancer.
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.
✗
Web Security Scanner scan rule
Why it's wrong here
Web Security Scanner is a separate tool for scanning vulnerabilities.
✗
Signed URL policy
Why it's wrong here
Signed URLs are a Cloud CDN feature for access control.
✗
Preconfigured Identity-Aware Proxy (IAP) rule
Why it's wrong here
IAP is a separate feature, not a Cloud Armor security policy.
✓
Preconfigured OWASP Top 10 rules
Why this is correct
Cloud Armor includes predefined WAF rules for OWASP vulnerabilities.
Related concept
Read the scenario before looking for a memorised answer.
✓
Custom rule with rate limiting based on IP
Why this is correct
Cloud Armor supports custom rules including rate limiting.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between Cloud Armor security policies and other Google Cloud security services (like IAP, Signed URLs, or Web Security Scanner), so the trap here is confusing access control or URL signing mechanisms with the WAF-like rule engine of Cloud Armor.
Detailed technical explanation
How to think about this question
Cloud Armor security policies are evaluated at the edge of Google's network, before traffic reaches the load balancer, using a rule engine that supports both preconfigured rules (e.g., OWASP Top 10) and custom rules with conditions like IP address, request headers, and rate limiting. Rate limiting in custom rules uses a token bucket algorithm, where you define a rate (e.g., 100 requests per minute per IP) and a burst size, and exceeding the limit triggers a configurable action (deny or redirect). In a real-world scenario, combining OWASP rules with IP-based rate limiting can mitigate both application-layer attacks and DDoS attempts without impacting legitimate traffic.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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.
Managing operations in a cloud solution environment — This question tests Managing operations in a cloud solution environment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Preconfigured OWASP Top 10 rules — Option D is correct because Cloud Armor includes preconfigured rules that map directly to the OWASP Top 10 web application vulnerabilities, such as SQL injection and cross-site scripting (XSS). These rules are managed by Google and automatically updated to protect against the latest attack patterns, making them a valid security policy for a global external HTTP(S) Load Balancer.
What should I do if I get this PCSE 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.
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Question Discussion
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