The correct combination is Microsoft Entra authentication, firewall rules, and managed identity. This trio directly addresses the security policy: Microsoft Entra authentication enforces identity-based access control, firewall rules block all IP addresses outside your corporate network, and a managed identity—either system-assigned or user-assigned—lets the application obtain an access token from Microsoft Entra ID without ever storing credentials in code. On the DP-300 exam, this scenario tests your understanding of how these three Azure SQL Database features work together to meet modern security requirements, often appearing as a multi-condition question where each option must satisfy all constraints. A common trap is choosing just Entra authentication and firewall rules while forgetting the credentialless connection requirement, or mistakenly selecting a service principal instead of a managed identity. Remember the mnemonic “E-F-M” for Entra, Firewall, Managed identity—each covers one pillar of the policy: identity, network, and secrets.
DP-300 Plan and implement data platform resources Practice Question
This DP-300 practice question tests your understanding of plan and implement data platform resources. 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 are configuring Azure SQL Database for a new application. The security policy requires that all connections use Microsoft Entra authentication and that the database blocks IP addresses from outside your corporate network. You also need to ensure that the application can connect without storing credentials in code. Which combination of features should you implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft Entra authentication, firewall rules, and managed identity
Option B is correct because it satisfies all three requirements: Microsoft Entra authentication enforces identity-based access, firewall rules block IP addresses outside the corporate network, and a managed identity allows the application to connect without storing credentials in code by using a system-assigned or user-assigned identity to obtain an access token from Microsoft Entra ID.
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.
✗
Always Encrypted, VNet service endpoints, and SQL authentication
Why it's wrong here
Always Encrypted does not handle authentication or firewall.
✓
Microsoft Entra authentication, firewall rules, and managed identity
Why this is correct
Managed identity allows application to authenticate without credentials.
Related concept
Read the scenario before looking for a memorised answer.
✗
Transparent Data Encryption, IP firewall rules, and connection strings
Why it's wrong here
TDE encrypts data, not authentication.
✗
Azure Defender for SQL, firewall rules, and service principal
Why it's wrong here
Azure Defender is not for authentication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse managed identity with a service principal, not realizing that a service principal still requires a secret or certificate to be stored, whereas a managed identity eliminates credential storage entirely.
Detailed technical explanation
How to think about this question
Managed identities in Azure provide an automatically managed identity in Microsoft Entra ID, enabling applications to authenticate to Azure SQL Database without storing credentials by requesting a token from the Azure Instance Metadata Service (IMDS) endpoint (169.254.169.254). The firewall rules in Azure SQL Database operate at the server level, using the 'Deny' default and allowing only specific client IP ranges, which can be configured via the Azure portal or T-SQL with the `sp_set_firewall_rule` stored procedure. Under the hood, the managed identity token is passed as a password in the connection string using the 'Authentication=Active Directory Managed Identity' keyword, which is supported by the Microsoft.Data.SqlClient driver.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this DP-300 question in full detail.
Plan and implement data platform resources — This question tests Plan and implement data platform resources — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Microsoft Entra authentication, firewall rules, and managed identity — Option B is correct because it satisfies all three requirements: Microsoft Entra authentication enforces identity-based access, firewall rules block IP addresses outside the corporate network, and a managed identity allows the application to connect without storing credentials in code by using a system-assigned or user-assigned identity to obtain an access token from Microsoft Entra ID.
What should I do if I get this DP-300 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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