The answer is `az deployment group what-if`. This command is correct because it performs a dry-run validation of a Bicep or ARM template against a specific resource group, generating a detailed preview of what Azure will create, modify, or delete without actually applying any changes. On the AZ-104 exam, this tests your understanding of safe deployment practices and the Bicep what-if deployment preview feature, which is critical for avoiding unintended infrastructure modifications. A common trap is confusing this with `az deployment group validate`, which only checks syntax and resource properties but does not show the delta between current and desired state. Remember the memory tip: “What-if shows the diff, validate just checks the script.”
AZ-104 Deploy and Manage Azure Compute Practice Question
This AZ-104 practice question tests your understanding of deploy and manage azure compute. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
You want to deploy a resource group with Bicep and see the changes Azure plans to make before you apply them. Which command should you run?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
az deployment group what-if
The `az deployment group what-if` command is correct because it performs a dry-run validation of a Bicep (or ARM) deployment against a resource group, showing the changes Azure will make (create, modify, delete) without actually applying them. This is the Azure equivalent of a 'what-if' analysis, allowing you to review the impact before execution.
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.
✓
az deployment group what-if
Why this is correct
The what-if command previews planned changes so you can review them before deploying the template.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
az deployment group create
Why it's wrong here
This command applies the deployment, but it does not provide a preview of planned changes first.
✗
az group delete
Why it's wrong here
This command removes the resource group and is unrelated to previewing template changes.
✗
az vm update
Why it's wrong here
This command updates a virtual machine, but it does not analyze a Bicep deployment plan.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse `az deployment group what-if` with `az deployment group create`, assuming that `create` also provides a preview, but `create` immediately applies changes without any dry-run capability.
Trap categories for this question
Command / output trap
This command applies the deployment, but it does not provide a preview of planned changes first.
Detailed technical explanation
How to think about this question
Under the hood, `az deployment group what-if` uses the Azure Resource Manager's 'What-If' operation, which evaluates the Bicep template against the current state of the resource group and returns a list of resource changes (e.g., `Create`, `Modify`, `Delete`, `NoChange`). This is especially useful in CI/CD pipelines to catch unintended modifications, such as accidental deletion of a storage account due to a missing `resourceGroup()` reference in the Bicep file.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-104 question in full detail.
Deploy and Manage Azure Compute — This question tests Deploy and Manage Azure Compute — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: az deployment group what-if — The `az deployment group what-if` command is correct because it performs a dry-run validation of a Bicep (or ARM) deployment against a resource group, showing the changes Azure will make (create, modify, delete) without actually applying them. This is the Azure equivalent of a 'what-if' analysis, allowing you to review the impact before execution.
What should I do if I get this AZ-104 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: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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