PCDOE Implementing service monitoring strategies Practice Question
This PCDOE practice question tests your understanding of implementing service monitoring strategies. 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 company runs a microservices architecture on GKE with Istio. They want to generate custom request-level metrics for SLO tracking without modifying application code. Which approach is most efficient?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set up Istio telemetry with the Cloud Monitoring adapter
Option A is correct because Istio's telemetry v2 can be configured to export custom request-level metrics (e.g., latency, error rate) to Cloud Monitoring via the Cloud Monitoring adapter without modifying application code. This approach leverages Istio's sidecar proxy to capture metrics at the service mesh layer, making it the most efficient and non-invasive method for SLO tracking.
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.
✓
Set up Istio telemetry with the Cloud Monitoring adapter
Why this is correct
Istio's adapter exports request metrics directly to Cloud Monitoring.
Related concept
Read the scenario before looking for a memorised answer.
✗
Write a custom Prometheus exporter deploying in each pod
Why it's wrong here
This requires code changes and is less efficient.
✗
Use the Cloud Monitoring agent to scrape metrics from pods
Why it's wrong here
The agent collects system metrics, not Istio request metrics.
✗
Enable Stackdriver for GKE (deprecated)
Why it's wrong here
This is deprecated and not the most efficient approach.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that the Cloud Monitoring agent (or legacy Stackdriver) can scrape Istio metrics from pods, but in reality, the agent operates at the VM or node level and cannot access the Envoy proxy's in-memory metrics without explicit Prometheus scraping configuration.
Detailed technical explanation
How to think about this question
Istio's telemetry v2 uses Envoy proxy's metadata exchange and Wasm extensions to generate rich request-level metrics (e.g., istio_requests_total, istio_request_duration_milliseconds) which are then scraped by Prometheus. The Cloud Monitoring adapter (via the Stackdriver adapter in Mixer or the newer Prometheus-based federation) allows these metrics to be sent directly to Cloud Monitoring for SLO dashboards and alerting, all without touching application code. A subtle behavior is that the adapter can filter or aggregate metrics at the mesh level, reducing noise and cost compared to exporting all raw metrics.
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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
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.
Implementing service monitoring strategies — This question tests Implementing service monitoring strategies — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set up Istio telemetry with the Cloud Monitoring adapter — Option A is correct because Istio's telemetry v2 can be configured to export custom request-level metrics (e.g., latency, error rate) to Cloud Monitoring via the Cloud Monitoring adapter without modifying application code. This approach leverages Istio's sidecar proxy to capture metrics at the service mesh layer, making it the most efficient and non-invasive method for SLO tracking.
What should I do if I get this PCDOE 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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