The correct answer is that the SAS token provides read access to the container for querying data. This is because the token’s permissions, as shown in the exhibit with `sp=rl`, specifically grant read (`r`) and list (`l`) access at the container level, allowing the serverless SQL pool to enumerate and read files within that container without needing full storage account keys. On the DP-203 exam, this concept tests your understanding of how external data sources in Synapse serverless rely on shared access signatures for secure, delegated access—a common trap is confusing container-level SAS with file-level SAS, or assuming write permissions are included when they are not. Remember the mnemonic “Read and List, that’s the gist” to recall that `sp=rl` means read-only querying, not data modification.
DP-203 Practice Question: Secure, monitor, and optimize data storage and data processing
This DP-203 practice question tests your understanding of secure, monitor, and optimize data storage and data processing. 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.
Exhibit
Refer to the exhibit.
CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'MyStr0ngP@ssw0rd!';
CREATE DATABASE SCOPED CREDENTIAL SasCredential
WITH IDENTITY = 'SHARED ACCESS SIGNATURE',
SECRET = '?sv=2020-08-04&ss=b&srt=sco&sp=rl&se=2025-12-31T23:59:59Z&st=2025-01-01T00:00:00Z&spr=https&sig=...';
CREATE EXTERNAL DATA SOURCE MyDataSource WITH (
LOCATION = 'wasbs://mycontainer@mystorageaccount.blob.core.windows.net',
CREDENTIAL = SasCredential
);
You are reviewing a script to create an external data source in Azure Synapse Analytics serverless SQL pool. Based on the exhibit, what is the purpose of the SAS token?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
To provide read access to the container for querying data.
Option B is correct because the SAS token provides delegated access to the storage account for reading (sp=r) and listing (sp=l). Option A is wrong because the SAS is for a container, not a specific file. Option C is wrong because the SAS does not have write permission (sp=rl). Option D is wrong because the SAS is used in the credential for the external data source.
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.
✓
To provide read access to the container for querying data.
Why this is correct
The SAS includes 'sp=rl' which grants read and list permissions.
Related concept
Read the scenario before looking for a memorised answer.
✗
To provide write access to the container for storing query results.
Why it's wrong here
The permissions are 'rl' (read and list), not write.
✗
To encrypt the connection between the serverless pool and storage.
Why it's wrong here
SAS is not used for encryption; HTTPS handles encryption.
✗
To authenticate the user to the serverless SQL pool.
Why it's wrong here
The credential is for storage access, not SQL pool authentication.
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-203 question in full detail.
Identify which DP-203 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.
Secure, monitor, and optimize data storage and data processing — This question tests Secure, monitor, and optimize data storage and data processing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: To provide read access to the container for querying data. — Option B is correct because the SAS token provides delegated access to the storage account for reading (sp=r) and listing (sp=l). Option A is wrong because the SAS is for a container, not a specific file. Option C is wrong because the SAS does not have write permission (sp=rl). Option D is wrong because the SAS is used in the credential for the external data source.
What should I do if I get this DP-203 question wrong?
Identify which DP-203 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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