Microsoft Entra authentication is correct. Microsoft Entra authentication integrates Azure SQL with the Microsoft Entra ID identity platform so that user sign ins are processed by the identity provider and can be protected with multi factor authentication.

Microsoft Entra authentication works by using Azure AD based identities and Conditional Access policies to enforce requirements such as MFA for interactive user sign ins to Azure SQL. Configuring Azure SQL to use Entra authentication means the database trusts the identity platform and therefore honors MFA rules you apply there.

Microsoft Entra authentication is the current name for the identity service formerly referred to as Azure Active Directory, and exam questions may use either name depending on when the content was written.

Certificate based authentication is incorrect because Azure SQL does not rely on client certificates as the mechanism to require per user multi factor authentication for interactive user sign ins.

Service principal authentication is incorrect because service principals represent applications or non interactive identities and they are not subject to user MFA requirements which apply to human sign ins.

SQL authentication is incorrect because SQL authentication uses static database credentials and cannot enforce Microsoft Entra based MFA for user connections.

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