The answer is that the SAS token has expired or is invalid. This is the most likely cause because when configuring long-term backup retention via an ARM template, the SAS token serves as the authentication mechanism for the storage account where backups are stored; if the token is expired, malformed, or lacks the necessary permissions (such as write or list), Azure SQL Database cannot access the container to write backup files, causing the deployment to fail. On the Microsoft Azure Database Administrator Associate DP-300 exam, this scenario tests your understanding of how shared access signatures work in conjunction with ARM templates for long-term backup retention—a common trap is assuming the storage container URI or location is the issue, but the exam emphasizes that the SAS token’s validity is the critical checkpoint. Remember the mnemonic: “SAS must last past the backup task.”
DP-300 Practice Question: Monitor, configure, and optimize database resources
This DP-300 practice question tests your understanding of monitor, configure, and optimize database resources. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 are reviewing an Azure Resource Manager template snippet for configuring long-term backup retention for an Azure SQL Database. The deployment fails with an error indicating the storage account is not accessible. What is the most likely cause?
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 SAS token has expired or is invalid
The exhibit shows a SAS token in the template. The most common issue is that the SAS token has expired or is invalid. Option B is correct. Option A is wrong because the storage container URI is valid. Option C is wrong because the location is valid. Option D is wrong because the SAS token is used for authentication.
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 server name in the template does not match the actual server
Why it's wrong here
The error indicates storage access issue, not server mismatch.
✗
The storage container URI is incorrectly formatted
Why it's wrong here
The URI appears correctly formatted.
✓
The SAS token has expired or is invalid
Why this is correct
Expired or invalid SAS token is a common cause of access errors.
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 database is not in the same region as the storage account
Why it's wrong here
Cross-region backup is supported.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Monitor, configure, and optimize database resources — This question tests Monitor, configure, and optimize database resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The SAS token has expired or is invalid — The exhibit shows a SAS token in the template. The most common issue is that the SAS token has expired or is invalid. Option B is correct. Option A is wrong because the storage container URI is valid. Option C is wrong because the location is valid. Option D is wrong because the SAS token is used for authentication.
What should I do if I get this DP-300 question wrong?
Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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