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Exam Code: DP-800

Exam Name: Developing AI-Enabled Database Solutions

Certification Provider: Microsoft

Corresponding Certification: Microsoft Certified: SQL AI Developer Associate

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Microsoft DP-800 Practice Test 47

Question 460

A transaction workload slows under many concurrent writers even though individual INSERT statements are simple. What measurement or test best demonstrates that the requirement is satisfied?

  1. Logical reads and transferred bytes decrease while requested data stays correct.
  2. A query plan uses the intended index range seek and returns identical date-filtered rows.
  3. Load tests show reduced latch waits and consistent insert correctness.
  4. Sample operations produce searchable audit events with principal and timestamp.

Explanation

Correct Answer

C:

Page-level hot spots can constrain concurrency beyond disk capacity; fixes require evidence of actual latch waits. The observation “Load tests show reduced latch waits and consistent insert correctness” directly confirms the chosen action worked for this situation: A transaction workload slows under many concurrent writers even though individual INSERT statements are simple.

Incorrect Answers

A:

Overfetching wastes IO and network capacity; targeted projection can allow lean index access. This observation would not establish that the required result occurred for A transaction workload slows under many concurrent writers even though individual INSERT statements are simple. The confirming test is: Load tests show reduced latch waits and consistent insert correctness.

B:

Applying functions to indexed columns often prevents efficient predicate seek pushdown. This observation would not establish that the required result occurred for A transaction workload slows under many concurrent writers even though individual INSERT statements are simple. The confirming test is: Load tests show reduced latch waits and consistent insert correctness.

D:

Auditing records database activity; Query Store is primarily a performance history facility. This observation would not establish that the required result occurred for A transaction workload slows under many concurrent writers even though individual INSERT statements are simple. The confirming test is: Load tests show reduced latch waits and consistent insert correctness.

Question 461

A service retries failed transactions indefinitely during a deadlock storm, saturating the database. What is the most defensible next technical action?

  1. Add bounded, classified transient retries with backoff after addressing underlying lock conflicts.
  2. Implement optimistic concurrency using a rowversion or equivalent checked update token.
  3. Identify the cycle and standardize access order, shorten transactions, and add bounded retry on deadlock victims.
  4. Review ownership chaining, execution context and explicit grants before exposing database routines.

Explanation

Correct Answer

A:

Retry logic must be finite and targeted; uncontrolled retries worsen resource contention. For the described situation—A service retries failed transactions indefinitely during a deadlock storm, saturating the database—the targeted fix is Add bounded, classified transient retries with backoff after addressing underlying lock conflicts. A successful test should show: Failing requests recover within limits or surface errors without a retry amplification storm.

Incorrect Answers

B:

Optimistic concurrency compares version tokens to prevent lost updates without holding long locks. But that technique does not solve the stated problem—A service retries failed transactions indefinitely during a deadlock storm, saturating the database. The needed intervention is Add bounded, classified transient retries with backoff after addressing underlying lock conflicts.

C:

Deadlocks form cycles of lock dependencies; a victim rollback must be handled and root lock patterns improved. But that technique does not solve the stated problem—A service retries failed transactions indefinitely during a deadlock storm, saturating the database. The needed intervention is Add bounded, classified transient retries with backoff after addressing underlying lock conflicts.

D:

SQL permissions and ownership chains affect effective access; dynamic SQL may require separate authorization. But that technique does not solve the stated problem—A service retries failed transactions indefinitely during a deadlock storm, saturating the database. The needed intervention is Add bounded, classified transient retries with backoff after addressing underlying lock conflicts.

Question 462

A service retries failed transactions indefinitely during a deadlock storm, saturating the database. Which result distinguishes a successful implementation from a cosmetic change?

  1. A query plan uses the intended index range seek and returns identical date-filtered rows.
  2. Failing requests recover within limits or surface errors without a retry amplification storm.
  3. Concurrent reports avoid dirty data while meeting tested read/write throughput goals.
  4. The pipeline rejects a logically incorrect procedure despite a successful schema build.

Explanation

Correct Answer

B:

Retry logic must be finite and targeted; uncontrolled retries worsen resource contention. The observation “Failing requests recover within limits or surface errors without a retry amplification storm” directly confirms the chosen action worked for this situation: A service retries failed transactions indefinitely during a deadlock storm, saturating the database.

Incorrect Answers

A:

Applying functions to indexed columns often prevents efficient predicate seek pushdown. This observation would not establish that the required result occurred for A service retries failed transactions indefinitely during a deadlock storm, saturating the database. The confirming test is: Failing requests recover within limits or surface errors without a retry amplification storm.

C:

READ UNCOMMITTED or NOLOCK may read uncommitted changes; row versioning can improve concurrency without dirty reads. This observation would not establish that the required result occurred for A service retries failed transactions indefinitely during a deadlock storm, saturating the database. The confirming test is: Failing requests recover within limits or surface errors without a retry amplification storm.

D:

Build validation checks syntax/schema dependencies; tests verify behavior and interactions. This observation would not establish that the required result occurred for A service retries failed transactions indefinitely during a deadlock storm, saturating the database. The confirming test is: Failing requests recover within limits or surface errors without a retry amplification storm.

Question 463

An app treats all transient SQL errors as immediate infinite retries without jitter or limit. Which solution is the most appropriate for the scenario?

  1. Rewrite predicates to sargable range conditions where semantics are preserved.
  2. Inspect actual execution plans and relevant Query Store runtime statistics before changing indexes.
  3. Instrument the app with Application Insights and SQL diagnostics with shared correlation context.
  4. Add bounded, classified transient retries with backoff after addressing underlying lock conflicts.

Explanation

Correct Answer

D:

Retry logic must be finite and targeted; uncontrolled retries worsen resource contention. For the described situation—An app treats all transient SQL errors as immediate infinite retries without jitter or limit—the targeted fix is Add bounded, classified transient retries with backoff after addressing underlying lock conflicts. A successful test should show: Failing requests recover within limits or surface errors without a retry amplification storm.

Incorrect Answers

A:

Applying functions to indexed columns often prevents efficient predicate seek pushdown. But that technique does not solve the stated problem—An app treats all transient SQL errors as immediate infinite retries without jitter or limit. The needed intervention is Add bounded, classified transient retries with backoff after addressing underlying lock conflicts.

B:

Execution plans show access paths and join strategies; blind indexing is not reliable diagnosis. But that technique does not solve the stated problem—An app treats all transient SQL errors as immediate infinite retries without jitter or limit. The needed intervention is Add bounded, classified transient retries with backoff after addressing underlying lock conflicts.

C:

Application Insights complements database-level metrics by connecting application requests to dependencies. But that technique does not solve the stated problem—An app treats all transient SQL errors as immediate infinite retries without jitter or limit. The needed intervention is Add bounded, classified transient retries with backoff after addressing underlying lock conflicts.

Question 464

An app treats all transient SQL errors as immediate infinite retries without jitter or limit. What should a technical reviewer verify before approving completion?

  1. Logical reads and transferred bytes decrease while requested data stays correct.
  2. Load tests show reduced latch waits and consistent insert correctness.
  3. Failing requests recover within limits or surface errors without a retry amplification storm.
  4. The function processes the expected change and retries safely without duplication.

Explanation

Correct Answer

C:

Retry logic must be finite and targeted; uncontrolled retries worsen resource contention. The observation “Failing requests recover within limits or surface errors without a retry amplification storm” directly confirms the chosen action worked for this situation: An app treats all transient SQL errors as immediate infinite retries without jitter or limit.

Incorrect Answers

A:

Overfetching wastes IO and network capacity; targeted projection can allow lean index access. This observation would not establish that the required result occurred for An app treats all transient SQL errors as immediate infinite retries without jitter or limit. The confirming test is: Failing requests recover within limits or surface errors without a retry amplification storm.

B:

Page-level hot spots can constrain concurrency beyond disk capacity; fixes require evidence of actual latch waits. This observation would not establish that the required result occurred for An app treats all transient SQL errors as immediate infinite retries without jitter or limit. The confirming test is: Failing requests recover within limits or surface errors without a retry amplification storm.

D:

SQL trigger bindings integrate change detection into function execution but handlers need idempotency. This observation would not establish that the required result occurred for An app treats all transient SQL errors as immediate infinite retries without jitter or limit. The confirming test is: Failing requests recover within limits or surface errors without a retry amplification storm.

Question 465

A SQL database schema is maintained by manual edits without a reproducible build artifact. What should the SQL developer implement after verifying the conditions?

  1. Use an approved SqlPackage/DACPAC publishing workflow with preview and permissions.
  2. Use a SQL Database Project containing declarative schema objects and run a project build.
  3. Set the SQL project target platform correctly and validate compatibility before generating a deployment.
  4. Enable and consume supported Change Data Capture with managed retention.

Explanation

Correct Answer

B:

SQL Database Projects model schema as source files and validate object dependencies during build. For the described situation—A SQL database schema is maintained by manual edits without a reproducible build artifact—the targeted fix is Use a SQL Database Project containing declarative schema objects and run a project build. A successful test should show: A clean build produces a consistent schema model without environment-specific manual fixes.

Incorrect Answers

A:

DACPAC deployment synchronizes model schema under controlled configuration, not arbitrary unreviewed scripts. But that technique does not solve the stated problem—A SQL database schema is maintained by manual edits without a reproducible build artifact. The needed intervention is Use a SQL Database Project containing declarative schema objects and run a project build.

C:

Target platform models determine which schema features are valid in the destination SQL version. But that technique does not solve the stated problem—A SQL database schema is maintained by manual edits without a reproducible build artifact. The needed intervention is Use a SQL Database Project containing declarative schema objects and run a project build.

D:

CDC records change data for replay, unlike simple change tracking versions. But that technique does not solve the stated problem—A SQL database schema is maintained by manual edits without a reproducible build artifact. The needed intervention is Use a SQL Database Project containing declarative schema objects and run a project build.

Question 466

A SQL database schema is maintained by manual edits without a reproducible build artifact. Which verification finding is most specific to this scenario?

  1. A production release is blocked until authorized approvers sign off and checks pass.
  2. The unexpected object or configuration is reported before any destructive deployment.
  3. A clean build produces a consistent schema model without environment-specific manual fixes.
  4. A cross-resource query finds the relevant timestamped errors for a simulated incident.

Explanation

Correct Answer

C:

SQL Database Projects model schema as source files and validate object dependencies during build. The observation “A clean build produces a consistent schema model without environment-specific manual fixes” directly confirms the chosen action worked for this situation: A SQL database schema is maintained by manual edits without a reproducible build artifact.

Incorrect Answers

A:

Deployment automation should preserve segregation of duties for high-impact database changes. This observation would not establish that the required result occurred for A SQL database schema is maintained by manual edits without a reproducible build artifact. The confirming test is: A clean build produces a consistent schema model without environment-specific manual fixes.

B:

Schema drift occurs when deployed objects differ from version-controlled declarative models. This observation would not establish that the required result occurred for A SQL database schema is maintained by manual edits without a reproducible build artifact. The confirming test is: A clean build produces a consistent schema model without environment-specific manual fixes.

D:

Log Analytics provides centralized queryable telemetry; metrics dashboards alone do not store every event. This observation would not establish that the required result occurred for A SQL database schema is maintained by manual edits without a reproducible build artifact. The confirming test is: A clean build produces a consistent schema model without environment-specific manual fixes.

Question 467

A team wants its schema objects versioned and validated before deployment. Which approach achieves the intended result without bypassing the stated controls?

  1. Make seed scripts idempotent using validated keys and conditional updates/inserts.
  2. Publish the signed/identified DACPAC from the validated build through controlled deployment stages.
  3. Use a SQL Database Project containing declarative schema objects and run a project build.
  4. Grant least-privilege SELECT on the approved object and remove broad roles.

Explanation

Correct Answer

C:

SQL Database Projects model schema as source files and validate object dependencies during build. For the described situation—A team wants its schema objects versioned and validated before deployment—the targeted fix is Use a SQL Database Project containing declarative schema objects and run a project build. A successful test should show: A clean build produces a consistent schema model without environment-specific manual fixes.

Incorrect Answers

A:

Idempotency makes repeated migration runs safe under retries and partial failures. But that technique does not solve the stated problem—A team wants its schema objects versioned and validated before deployment. The needed intervention is Use a SQL Database Project containing declarative schema objects and run a project build.

B:

Promoting the same validated artifact strengthens release traceability and reduces environment divergence. But that technique does not solve the stated problem—A team wants its schema objects versioned and validated before deployment. The needed intervention is Use a SQL Database Project containing declarative schema objects and run a project build.

D:

Object-level GRANT/DENY provides granular access without conferring database-wide administration. But that technique does not solve the stated problem—A team wants its schema objects versioned and validated before deployment. The needed intervention is Use a SQL Database Project containing declarative schema objects and run a project build.

Question 468

A team wants its schema objects versioned and validated before deployment. How should the team validate the selected design?

  1. The production artifact hash matches the reviewed build and deployment record.
  2. A clean build produces a consistent schema model without environment-specific manual fixes.
  3. The pipeline rejects a logically incorrect procedure despite a successful schema build.
  4. Anonymous and cross-role requests are denied while authorized queries return only allowed records.

Explanation

Correct Answer

B:

SQL Database Projects model schema as source files and validate object dependencies during build. The observation “A clean build produces a consistent schema model without environment-specific manual fixes” directly confirms the chosen action worked for this situation: A team wants its schema objects versioned and validated before deployment.

Incorrect Answers

A:

Promoting the same validated artifact strengthens release traceability and reduces environment divergence. This observation would not establish that the required result occurred for A team wants its schema objects versioned and validated before deployment. The confirming test is: A clean build produces a consistent schema model without environment-specific manual fixes.

C:

Build validation checks syntax/schema dependencies; tests verify behavior and interactions. This observation would not establish that the required result occurred for A team wants its schema objects versioned and validated before deployment. The confirming test is: A clean build produces a consistent schema model without environment-specific manual fixes.

D:

TLS encrypts transport but does not establish user authorization or row-level entitlements. This observation would not establish that the required result occurred for A team wants its schema objects versioned and validated before deployment. The confirming test is: A clean build produces a consistent schema model without environment-specific manual fixes.

Question 469

A project must build on a CI agent without requiring a full legacy IDE installation. What intervention should the responsible engineer choose?

  1. Use an SDK-style SQL Database Project with the appropriate build tooling and target platform.
  2. Use protected secrets or federated/workload identity with environment scope and least privilege.
  3. Version static reference data with controlled seed/deployment scripts and idempotent updates.
  4. Configure DAB GraphQL entities and relationships with supported keys and permissions.

Explanation

Correct Answer

A:

SDK-style SQL projects support standardized build workflows and target-platform validation. For the described situation—A project must build on a CI agent without requiring a full legacy IDE installation—the targeted fix is Use an SDK-style SQL Database Project with the appropriate build tooling and target platform. A successful test should show: A headless CI build validates the project and emits the expected deployable DACPAC.

Incorrect Answers

B:

Pipeline credentials must be stored outside source with restricted environment approval and identity scope. But that technique does not solve the stated problem—A project must build on a CI agent without requiring a full legacy IDE installation. The needed intervention is Use an SDK-style SQL Database Project with the appropriate build tooling and target platform.

C:

Reference data needs governed source control and safe migration semantics, not ad hoc admin inserts. But that technique does not solve the stated problem—A project must build on a CI agent without requiring a full legacy IDE installation. The needed intervention is Use an SDK-style SQL Database Project with the appropriate build tooling and target platform.

D:

GraphQL relationships expose linked data through a defined schema, not arbitrary cross-database joins. But that technique does not solve the stated problem—A project must build on a CI agent without requiring a full legacy IDE installation. The needed intervention is Use an SDK-style SQL Database Project with the appropriate build tooling and target platform.

Question 470

A project must build on a CI agent without requiring a full legacy IDE installation. What observable outcome proves the recommendation worked?

  1. A staging migration retains record counts and transforms fields without data loss.
  2. A production release is blocked until authorized approvers sign off and checks pass.
  3. A headless CI build validates the project and emits the expected deployable DACPAC.
  4. Identity-disabled users lose access and successful sessions show approved organizational identity.

Explanation

Correct Answer

C:

SDK-style SQL projects support standardized build workflows and target-platform validation. The observation “A headless CI build validates the project and emits the expected deployable DACPAC” directly confirms the chosen action worked for this situation: A project must build on a CI agent without requiring a full legacy IDE installation.

Incorrect Answers

A:

Declarative deployment may generate destructive operations; data-loss protection and review are essential. This observation would not establish that the required result occurred for A project must build on a CI agent without requiring a full legacy IDE installation. The confirming test is: A headless CI build validates the project and emits the expected deployable DACPAC.

B:

Deployment automation should preserve segregation of duties for high-impact database changes. This observation would not establish that the required result occurred for A project must build on a CI agent without requiring a full legacy IDE installation. The confirming test is: A headless CI build validates the project and emits the expected deployable DACPAC.

D:

Entra identities centralize credential lifecycle while SQL object grants still govern data access. This observation would not establish that the required result occurred for A project must build on a CI agent without requiring a full legacy IDE installation. The confirming test is: A headless CI build validates the project and emits the expected deployable DACPAC.

Developing AI-Enabled Database Solutions (DP-800) Practice Tests