AZ-400 Implement an instrumentation strategy Practice Question
This AZ-400 practice question tests your understanding of implement an instrumentation strategy. 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 team uses Azure Monitor to collect metrics from their Azure Kubernetes Service (AKS) cluster. They notice that container logs are missing from Log Analytics. The cluster was created with the default settings and no custom configuration was applied. What is the most likely reason for the missing logs?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The Data Collection Rule does not include the ContainerLogs table.
By default, an AKS cluster created with default settings does not have container logs (stdout/stderr) collected by Azure Monitor. Container logs require a Data Collection Rule (DCR) that includes the 'ContainerLogs' table. Without this DCR, the Azure Monitor agent will not collect container logs, even though other metrics may be sent to Log Analytics.
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.
✗
The diagnostic setting for the AKS cluster is not configured to send logs to Log Analytics.
Why it's wrong here
Diagnostic settings are for control plane logs, not container logs.
✗
The Log Analytics workspace is in a different region than the AKS cluster.
Why it's wrong here
Cross-region workspaces are supported for AKS.
✓
The Data Collection Rule does not include the ContainerLogs table.
Why this is correct
A DCR must specify which tables to collect; by default, container logs are not collected.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The Azure Monitor agent version on the nodes is outdated.
Why it's wrong here
The agent auto-updates; version is unlikely the cause.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse diagnostic settings (which control platform logs) with Data Collection Rules (which control container logs), leading them to incorrectly select Option A.
Detailed technical explanation
How to think about this question
Container logs in AKS are collected by the Azure Monitor container insights agent (a DaemonSet) that reads container stdout/stderr from the node's container runtime (e.g., containerd). The agent uses a Data Collection Rule (DCR) to determine which tables to populate in Log Analytics. If the DCR lacks the 'ContainerLogs' table, the agent will not send those logs, even though it may still collect performance metrics. This is a common pitfall when enabling container insights without verifying the DCR configuration.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-400 question in full detail.
Implement an instrumentation strategy — This question tests Implement an instrumentation strategy — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The Data Collection Rule does not include the ContainerLogs table. — By default, an AKS cluster created with default settings does not have container logs (stdout/stderr) collected by Azure Monitor. Container logs require a Data Collection Rule (DCR) that includes the 'ContainerLogs' table. Without this DCR, the Azure Monitor agent will not collect container logs, even though other metrics may be sent to Log Analytics.
What should I do if I get this AZ-400 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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