- A
Create a log-based metric for critical errors.
A log-based metric extracts error counts from logs, enabling quantitative alerting.
- B
Export logs to BigQuery for later analysis.
Why wrong: Export to BigQuery is for long-term analysis, not real-time notification.
- C
Create a Cloud Pub/Sub notification directly on the log sink.
Why wrong: While possible, this is not the standard approach; an alert policy provides more flexible thresholding and channels.
- D
Enable VPC Flow Logs to capture network traffic.
Why wrong: VPC Flow Logs are for network diagnostics, not application error monitoring.
- E
Set up a Cloud Monitoring alert policy based on the log-based metric.
The alert policy defines when to notify based on the metric value.
Question 60 of 1,000
PDE Ensuring solution quality Practice Question
This PDE practice question tests your understanding of ensuring solution quality. 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.
A company uses Cloud Logging to monitor application errors. They want to set up real-time notifications for critical errors. Which two actions are essential? (Choose two.)
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
✓
Create a log-based metric for critical errors.
A is correct because log-based metrics allow you to filter log entries for specific patterns (e.g., critical errors) and count them over time. This metric can then be used in Cloud Monitoring to trigger alerting policies, enabling real-time notifications when the threshold is breached.
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.
- ✓
Create a log-based metric for critical errors.
Why this is correct
A log-based metric extracts error counts from logs, enabling quantitative alerting.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Export logs to BigQuery for later analysis.
Why it's wrong here
Export to BigQuery is for long-term analysis, not real-time notification.
- ✗
Create a Cloud Pub/Sub notification directly on the log sink.
Why it's wrong here
While possible, this is not the standard approach; an alert policy provides more flexible thresholding and channels.
- ✗
Enable VPC Flow Logs to capture network traffic.
Why it's wrong here
VPC Flow Logs are for network diagnostics, not application error monitoring.
- ✓
Set up a Cloud Monitoring alert policy based on the log-based metric.
Why this is correct
The alert policy defines when to notify based on the metric value.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
A common trap is to think that creating a Cloud Pub/Sub notification directly on a log sink (option C) provides real-time notifications for critical errors. However, a log sink exports log entries to a destination (like Pub/Sub) for storage or processing, not for immediate alerting. Real-time notifications require a log-based metric and an alerting policy in Cloud Monitoring (options A and E).
Detailed technical explanation
How to think about this question
Log-based metrics are defined using a filter expression (e.g., severity>=ERROR AND resource.type="k8s_container") and can be either counter or distribution metrics. The alerting policy uses a rolling window (e.g., 5 minutes) and a threshold condition (e.g., count > 0) to trigger notifications via notification channels (email, SMS, PagerDuty). A common subtlety is that log-based metrics have a latency of up to a few minutes before data is available for alerting, so near-real-time is not instantaneous.
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 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.
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.
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FAQ
Questions learners often ask
What does this PDE question test?
Ensuring solution quality — This question tests Ensuring solution quality — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a log-based metric for critical errors. — A is correct because log-based metrics allow you to filter log entries for specific patterns (e.g., critical errors) and count them over time. This metric can then be used in Cloud Monitoring to trigger alerting policies, enabling real-time notifications when the threshold is breached.
What should I do if I get this PDE 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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Last reviewed: Jul 4, 2026
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