- A
gcloud compute instances update my-vm --add-label=cost-center=finance-ops
Why wrong: `gcloud compute instances update` updates instance settings, but `--add-label` is not a valid flag for this command. Use `add-labels`.
- B
gcloud compute instances add-labels my-vm --labels=cost-center=finance-ops --zone=us-central1-a
`gcloud compute instances add-labels` is the correct command for adding labels to an existing VM, using `--labels=key=value` syntax.
- C
gcloud label add --resource=my-vm --key=cost-center --value=finance-ops
Why wrong: `gcloud label` is not a valid command group. Labels are managed via the resource-specific commands (e.g., `gcloud compute instances add-labels`).
- D
gcloud compute instances set-labels my-vm --labels=cost-center=finance-ops
Why wrong: `set-labels` replaces all existing labels — it removes labels not included in the command. `add-labels` only adds/updates without removing others.
Quick Answer
The correct command is `gcloud compute instances add-labels my-vm --labels=cost-center=finance-ops --zone=us-central1-a`. This is the specific gcloud verb designed to add labels to an existing Compute Engine VM without recreating it, using the `--labels` flag to pass key-value pairs and the `--zone` flag to target the instance’s location. On the Google Associate Cloud Engineer exam, this tests your ability to manage metadata for cost attribution, a common real-world scenario where labels drive billing reports. A frequent trap is confusing `add-labels` with `update` or `create` commands—remember that `add-labels` appends new labels without removing existing ones, while `gcloud compute instances update` would require a full `--labels` replacement. For a memory tip, think “add-labels adds, update overwrites”—the verb itself tells you the behavior.
Google ACE Setting up a cloud solution environment Practice Question
This ACE practice question tests your understanding of setting up a cloud solution environment. 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 GCP project uses labels extensively for cost attribution across teams. A finance team member needs to add a 'cost-center' label to an existing Compute Engine VM. Which gcloud command applies the label?
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
gcloud compute instances add-labels my-vm --labels=cost-center=finance-ops --zone=us-central1-a
Option B is correct because the `gcloud compute instances add-labels` command is the specific gcloud command designed to add labels to an existing Compute Engine VM. It requires the `--labels` flag with key-value pairs and the `--zone` flag to specify the VM's location, which is necessary for the API call to succeed.
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.
- ✗
gcloud compute instances update my-vm --add-label=cost-center=finance-ops
Why it's wrong here
`gcloud compute instances update` updates instance settings, but `--add-label` is not a valid flag for this command. Use `add-labels`.
- ✓
gcloud compute instances add-labels my-vm --labels=cost-center=finance-ops --zone=us-central1-a
Why this is correct
`gcloud compute instances add-labels` is the correct command for adding labels to an existing VM, using `--labels=key=value` syntax.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
gcloud label add --resource=my-vm --key=cost-center --value=finance-ops
Why it's wrong here
`gcloud label` is not a valid command group. Labels are managed via the resource-specific commands (e.g., `gcloud compute instances add-labels`).
- ✗
gcloud compute instances set-labels my-vm --labels=cost-center=finance-ops
Why it's wrong here
`set-labels` replaces all existing labels — it removes labels not included in the command. `add-labels` only adds/updates without removing others.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse `add-labels` with `set-labels`, assuming both can add a label, but `set-labels` replaces all existing labels, which is a destructive operation that can silently remove other labels.
Trap categories for this question
Command / output trap
`gcloud compute instances update` updates instance settings, but `--add-label` is not a valid flag for this command. Use `add-labels`.
Detailed technical explanation
How to think about this question
Under the hood, the `add-labels` command uses the `instances.setLabels` API method with a PATCH semantics that merges the new labels into the existing label set, preserving other labels. In contrast, `set-labels` uses the same API method but overwrites the entire label map, which can inadvertently delete labels if not all existing labels are included in the request. This distinction is critical in environments where labels are used for cost attribution, as accidental removal can break billing reports.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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 ACE question test?
Setting up a cloud solution environment — This question tests Setting up 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: gcloud compute instances add-labels my-vm --labels=cost-center=finance-ops --zone=us-central1-a — Option B is correct because the `gcloud compute instances add-labels` command is the specific gcloud command designed to add labels to an existing Compute Engine VM. It requires the `--labels` flag with key-value pairs and the `--zone` flag to specify the VM's location, which is necessary for the API call to succeed.
What should I do if I get this ACE 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: Jun 11, 2026
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.
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