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ACE Practice Question: An operations team wants to count how many times…
This ACE practice question tests your understanding of an operations team wants to count how many times…. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
An operations team wants to count how many times the string 'PaymentFailure' appears in application logs per minute and alert when it exceeds 10 occurrences. Cloud Monitoring doesn't have a native metric for this log pattern. What is the correct approach?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Distractor review
Enable Cloud Trace and look for PaymentFailure in trace annotations
Cloud Trace tracks request latency — it's not designed for log pattern counting or alerting on error frequencies.
B
Distractor review
Create a Cloud Monitoring custom metric and write values via the application's exception handler
Writing from the app requires code changes — log-based metrics extract the count directly from existing log entries without modifying the application.
C
Best answer
Create a log-based metric in Cloud Logging with a filter matching 'PaymentFailure', then alert on it in Cloud Monitoring
Log-based metrics automatically count (or extract values from) log entries matching a filter. The resulting time-series metric is immediately usable in Cloud Monitoring alerting policies.
D
Distractor review
Export logs to BigQuery and run a scheduled query counting PaymentFailure entries
BigQuery queries run on a schedule with latency — log-based metrics provide near-real-time counting without pipeline complexity.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Related practice questions
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Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
What is the correct order of the Google Cloud resource hierarchy from highest to lowest level?
Question 2
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Question 3
Which gcloud command creates a Compute Engine VM named 'web-01' using the e2-medium machine type in zone us-central1-a?
Question 4
A team wants to receive an email alert when the average CPU utilization of VMs in a managed instance group exceeds 80% for more than 5 minutes. What should they create in Cloud Monitoring?
Question 5
A junior developer needs read-only access to all GCP resources in a project. Which IAM role grants the minimum permissions required?
Question 6
A startup creates its first Google Cloud project. Before deploying any paid resources, what must be linked to the project?
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FAQ
Questions learners often ask
What does this ACE question test?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: Create a log-based metric in Cloud Logging with a filter matching 'PaymentFailure', then alert on it in Cloud Monitoring — Log-based metrics in Cloud Logging extract numeric values or counts from log entries matching a filter. A counter metric counting log entries matching 'PaymentFailure' creates a time-series metric that Cloud Monitoring can then use for dashboards and alerting policies.
What should I do if I get this ACE question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ACE NAT questions on configuration and troubleshooting.
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This ACE 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 ACE exam.