The answer is the managed identity of the Synapse workspace, along with a shared access signature (SAS) token and a service principal with appropriate RBAC roles. Managed identity is correct because Azure Synapse serverless SQL pool can leverage the workspace’s system-assigned identity to authenticate to ADLS Gen2 without storing credentials, using the `IDENTITY='Managed Identity'` parameter in `OPENROWSET` or `CREATE EXTERNAL TABLE AS SELECT` statements. This method relies on granting the identity the Storage Blob Data Contributor role, making it a secure, credential-free option. On the DP-203 exam, this tests your understanding of authentication to ADLS Gen2 from Synapse serverless SQL, often appearing as a multi-select question where SAS tokens and service principals are also valid, but user delegation keys are not. A common trap is confusing managed identity with user-assigned identities, which are not supported for serverless SQL. Remember the mnemonic “MISS” for Managed Identity, SAS, and Service Principal—the three valid methods for serverless SQL to ADLS Gen2.
DP-203 Develop data processing Practice Question
This DP-203 practice question tests your understanding of develop 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.
Which THREE of the following are valid ways to authenticate to Azure Data Lake Storage Gen2 from Azure Synapse serverless SQL pool?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Managed identity of the Synapse workspace
Managed identity of the Synapse workspace (Option B) is correct because Azure Synapse serverless SQL pool can use the workspace's system-assigned managed identity to authenticate to Azure Data Lake Storage Gen2 without storing any credentials. This is enabled by granting the managed identity the appropriate RBAC role (e.g., Storage Blob Data Contributor) on the storage account, and then using the `IDENTITY='Managed Identity'` parameter in the `OPENROWSET` or `CREATE EXTERNAL TABLE AS SELECT` statements. It provides a secure, credential-free authentication method that is fully supported by serverless SQL pool.
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.
✗
Storage account key
Why it's wrong here
Serverless SQL pool does not support storage account key authentication.
✓
Managed identity of the Synapse workspace
Why this is correct
Serverless SQL pool can use the workspace's managed identity to access storage.
Related concept
Read the scenario before looking for a memorised answer.
✗
Service principal with certificate
Why it's wrong here
Service principal authentication is not directly supported in serverless SQL pool; it is used in Spark.
✓
Microsoft Entra ID (Azure AD) pass-through authentication
Why this is correct
Serverless SQL pool supports pass-through authentication using the caller's Microsoft Entra identity.
Related concept
Read the scenario before looking for a memorised answer.
✓
Shared access signature (SAS) token
Why this is correct
SAS token authentication is supported for serverless SQL pool via external data sources.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume storage account keys (Option A) are universally supported across all Azure Synapse components, but serverless SQL pool explicitly does not support key-based authentication, requiring token-based methods instead.
Detailed technical explanation
How to think about this question
Under the hood, Azure Synapse serverless SQL pool uses the Azure AD authentication flow to obtain an OAuth 2.0 token for the managed identity, which is then passed to Azure Data Lake Storage Gen2 via the HTTPSREST API. The serverless SQL pool's `OPENROWSET` function with `IDENTITY='Managed Identity'` triggers the token acquisition from the Azure Instance Metadata Service (IMDS) endpoint at `169.254.169.254`, which is only available within the Azure infrastructure. A real-world scenario where this matters is when you need to query data from a storage account in a different tenant or subscription; managed identity can still be used if the storage account grants access to the managed identity's object ID, but cross-tenant scenarios may require additional 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 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.
Develop data processing — This question tests Develop data processing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Managed identity of the Synapse workspace — Managed identity of the Synapse workspace (Option B) is correct because Azure Synapse serverless SQL pool can use the workspace's system-assigned managed identity to authenticate to Azure Data Lake Storage Gen2 without storing any credentials. This is enabled by granting the managed identity the appropriate RBAC role (e.g., Storage Blob Data Contributor) on the storage account, and then using the `IDENTITY='Managed Identity'` parameter in the `OPENROWSET` or `CREATE EXTERNAL TABLE AS SELECT` statements. It provides a secure, credential-free authentication method that is fully supported by serverless SQL pool.
What should I do if I get this DP-203 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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Question Discussion
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