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DP-800 Questions & Answers
Exam Code: DP-800
Exam Name: Developing AI-Enabled Database Solutions
Certification Provider: Microsoft
DP-800 Premium File
101 Questions & Answers
Last Update: Nov 12, 2026
Includes questions types found on actual exam such as drag and drop, simulation, type in, and fill in the blank.
Verified by experts
DP-800 Questions & Answers
Exam Code: DP-800
Exam Name: Developing AI-Enabled Database Solutions
Certification Provider: Microsoft
DP-800 Premium File
101 Questions & Answers
Last Update: Nov 12, 2026
Includes questions types found on actual exam such as drag and drop, simulation, type in, and fill in the blank.
$65.99
$59.99

Developing AI-Enabled Database Solutions DP-800 Practice Test 25

Question 240

The operational test fails because: Only checking current CPU utilization cannot identify a specific regressed query plan. The actual requirement is: A query becomes slow after a new index rollout and DBAs must compare actual plan regressions across time. Which corrective implementation addresses the cause?

  1. Evaluate workload metrics and choose an appropriate service tier or compute configuration against latency and cost needs
  2. Measure workload-specific I/O bottlenecks and choose capacity or workload scheduling changes
  3. Use an appropriate transaction isolation or concurrency-control pattern such as optimistic row-version checks
  4. Inspect Query Store plan history and execution metrics alongside current execution plans

Explanation

Correct Answer

D:

Inspect Query Store plan history and execution metrics alongside current execution plans. Query Store persists plan and runtime history to connect regressions with changed access paths. This directly corrects the observed failure, and success can be checked because investigators identify the slower plan and verify recovery after tuning.

Incorrect Answers

A:

Sizing decisions should reflect observed throughput, memory, I/O and concurrency limits. Although relevant to a database experiences bursts of CPU saturation and the team needs a capacity change based on measured workload rather than a blind upgrade, this action would not correct the recorded production failure: only checking current CPU utilization cannot identify a specific regressed query plan. Use the target remedy instead.

B:

Tier sizing and scheduling should address observed I/O contention rather than arbitrary CPU scaling. Although relevant to a transactional SQL database performs well at noon but breaches response-time SLO during nightly imports due to I/O pressure, this action would not correct the recorded production failure: only checking current CPU utilization cannot identify a specific regressed query plan. Use the target remedy instead.

C:

Concurrency control prevents lost updates or detects conflicting writes explicitly. Although relevant to two sessions update the same inventory item and the application sometimes overwrites one user's confirmed change, this action would not correct the recorded production failure: only checking current CPU utilization cannot identify a specific regressed query plan. Use the target remedy instead.

Question 241

A cross-functional engineering review records the following need: Two concurrent procedures acquire customer and invoice locks in opposite orders, producing deadlock victims. Which implementation best satisfies this requirement?

  1. Use consistent resource acquisition order and shorten transactions after inspecting the deadlock graph
  2. Use an appropriate transaction isolation or concurrency-control pattern such as optimistic row-version checks
  3. Evaluate workload metrics and choose an appropriate service tier or compute configuration against latency and cost needs
  4. Inspect Query Store plan history and execution metrics alongside current execution plans

Explanation

Correct Answer

A:

Deadlocks arise from cyclic lock waits; consistent ordering reduces the cycle risk. For this stated production need, the recommended implementation is: Use consistent resource acquisition order and shorten transactions after inspecting the deadlock graph. Evidence to look for: a concurrency replay no longer produces the same deadlock cycle.

Incorrect Answers

B:

Concurrency control prevents lost updates or detects conflicting writes explicitly. That method solves a different requirement: two sessions update the same inventory item and the application sometimes overwrites one user's confirmed change. The current case instead requires use consistent resource acquisition order and shorten transactions after inspecting the deadlock graph.

C:

Sizing decisions should reflect observed throughput, memory, I/O and concurrency limits. That method solves a different requirement: a database experiences bursts of CPU saturation and the team needs a capacity change based on measured workload rather than a blind upgrade. The current case instead requires use consistent resource acquisition order and shorten transactions after inspecting the deadlock graph.

D:

Query Store persists plan and runtime history to connect regressions with changed access paths. That method solves a different requirement: a query becomes slow after a new index rollout and DBAs must compare actual plan regressions across time. The current case instead requires use consistent resource acquisition order and shorten transactions after inspecting the deadlock graph.

Question 242

The database team applies the following decision: Use consistent resource acquisition order and shorten transactions after inspecting the deadlock graph. Given that two concurrent procedures acquire customer and invoice locks in opposite orders, producing deadlock victims. Which technical principle most directly explains why it works?

  1. Tier sizing and scheduling should address observed I/O contention rather than arbitrary CPU scaling
  2. Deadlocks arise from cyclic lock waits; consistent ordering reduces the cycle risk
  3. Versioned reads can reduce reader-writer blocking with defined isolation semantics
  4. Plans and runtime views isolate query-level regressions rather than generic infrastructure symptoms

Explanation

Correct Answer

B:

Deadlocks arise from cyclic lock waits; consistent ordering reduces the cycle risk. This explains why the selected approach meets the requirement rather than merely changing a nearby service. A confirming observation is: a concurrency replay no longer produces the same deadlock cycle.

Incorrect Answers

A:

Tier sizing and scheduling should address observed I/O contention rather than arbitrary CPU scaling. That principle is applicable when a transactional SQL database performs well at noon but breaches response-time SLO during nightly imports due to I/O pressure. It does not explain the selected change in the current case, which depends on deadlocks arise from cyclic lock waits; consistent ordering reduces the cycle risk.

C:

Versioned reads can reduce reader-writer blocking with defined isolation semantics. That principle is applicable when an inventory system must allow consistent snapshot reads while concurrent writes proceed without taking broad shared read locks. It does not explain the selected change in the current case, which depends on deadlocks arise from cyclic lock waits; consistent ordering reduces the cycle risk.

D:

Plans and runtime views isolate query-level regressions rather than generic infrastructure symptoms. That principle is applicable when a regression begins after a stored procedure was deployed, and DBAs need exact queries causing CPU spikes. It does not explain the selected change in the current case, which depends on deadlocks arise from cyclic lock waits; consistent ordering reduces the cycle risk.

Question 243

The deployment validation team is assessing this proposal: Use consistent resource acquisition order and shorten transactions after inspecting the deadlock graph. The check must catch this potential failure: Increasing command timeout does not resolve cyclic lock dependencies. Which observed outcome demonstrates the desired behavior?

  1. A long-running report sees a consistent allowed view without blocking ordinary updates
  2. Import and user workload both meet latency targets in the new arrangement
  3. A concurrency replay no longer produces the same deadlock cycle
  4. The selected tier meets the representative workload SLO at acceptable cost

Explanation

Correct Answer

C:

A concurrency replay no longer produces the same deadlock cycle. This is the direct acceptance criterion because deadlocks arise from cyclic lock waits; consistent ordering reduces the cycle risk. The validation should also distinguish the failure condition: increasing command timeout does not resolve cyclic lock dependencies.

Incorrect Answers

A:

A long-running report sees a consistent allowed view without blocking ordinary updates. That observation would validate a different requirement: an inventory system must allow consistent snapshot reads while concurrent writes proceed without taking broad shared read locks. Here the required evidence is a concurrency replay no longer produces the same deadlock cycle.

B:

Import and user workload both meet latency targets in the new arrangement. That observation would validate a different requirement: a transactional SQL database performs well at noon but breaches response-time SLO during nightly imports due to I/O pressure. Here the required evidence is a concurrency replay no longer produces the same deadlock cycle.

D:

The selected tier meets the representative workload SLO at acceptable cost. That observation would validate a different requirement: a database experiences bursts of CPU saturation and the team needs a capacity change based on measured workload rather than a blind upgrade. Here the required evidence is a concurrency replay no longer produces the same deadlock cycle.

Question 244

The reviewer rejects the current behavior: Increasing command timeout does not resolve cyclic lock dependencies. The actual requirement is: Two concurrent procedures acquire customer and invoice locks in opposite orders, producing deadlock victims. Which corrective implementation addresses the cause?

  1. Measure workload-specific I/O bottlenecks and choose capacity or workload scheduling changes
  2. Evaluate row-versioning isolation such as SNAPSHOT or READ COMMITTED SNAPSHOT for the workload
  3. Use Query Store execution history and DMVs to correlate query text, plans and resource waits
  4. Use consistent resource acquisition order and shorten transactions after inspecting the deadlock graph

Explanation

Correct Answer

D:

Use consistent resource acquisition order and shorten transactions after inspecting the deadlock graph. Deadlocks arise from cyclic lock waits; consistent ordering reduces the cycle risk. This directly corrects the observed failure, and success can be checked because a concurrency replay no longer produces the same deadlock cycle.

Incorrect Answers

A:

Tier sizing and scheduling should address observed I/O contention rather than arbitrary CPU scaling. Although relevant to a transactional SQL database performs well at noon but breaches response-time SLO during nightly imports due to I/O pressure, this action would not correct the recorded production failure: increasing command timeout does not resolve cyclic lock dependencies. Use the target remedy instead.

B:

Versioned reads can reduce reader-writer blocking with defined isolation semantics. Although relevant to an inventory system must allow consistent snapshot reads while concurrent writes proceed without taking broad shared read locks, this action would not correct the recorded production failure: increasing command timeout does not resolve cyclic lock dependencies. Use the target remedy instead.

C:

Plans and runtime views isolate query-level regressions rather than generic infrastructure symptoms. Although relevant to a regression begins after a stored procedure was deployed, and DBAs need exact queries causing CPU spikes, this action would not correct the recorded production failure: increasing command timeout does not resolve cyclic lock dependencies. Use the target remedy instead.

Question 245

A development review identifies this database requirement: A new stored procedure calculates order totals and the CI job must catch incorrect tax rounding before deployment. Which implementation best satisfies this requirement?

  1. Add repeatable database unit tests for edge cases and integration tests for table contracts
  2. Resolve the conflict through a reviewed pull request with tests before merging
  3. Fix the SQL Database Project model and rebuild to validate references before deployment
  4. Merge through reviewed pull requests and run an integrated SQL project build on the combined branch

Explanation

Correct Answer

A:

Database tests validate function behavior and cross-object interactions before release. For this stated production need, the recommended implementation is: Add repeatable database unit tests for edge cases and integration tests for table contracts. Evidence to look for: ci rejects a deliberately wrong rounding result in a test fixture.

Incorrect Answers

B:

Branch review exposes conflicting edits and confirms their combined behavior. That method solves a different requirement: two feature branches change the same stored procedure and one merge would silently remove another developer's fix. The current case instead requires add repeatable database unit tests for edge cases and integration tests for table contracts.

C:

Project builds can expose schema dependency errors early. That method solves a different requirement: a build fails because a stored procedure references a renamed column in another project object. The current case instead requires add repeatable database unit tests for edge cases and integration tests for table contracts.

D:

Integration validation tests schema dependencies after resolving branch conflicts. That method solves a different requirement: database developers create parallel feature branches and a migration references an object changed by another branch. The current case instead requires add repeatable database unit tests for edge cases and integration tests for table contracts.

Question 246

The engineer chooses the following change: Add repeatable database unit tests for edge cases and integration tests for table contracts. Given that a new stored procedure calculates order totals and the CI job must catch incorrect tax rounding before deployment. Which technical principle most directly explains why it works?

  1. SQL Database Projects describe a target schema in source-controlled definitions
  2. Database tests validate function behavior and cross-object interactions before release
  3. Secret-management and identity controls prevent credentials from being committed as plaintext
  4. Protected changes route sensitive schema and permission updates through accountable review

Explanation

Correct Answer

B:

Database tests validate function behavior and cross-object interactions before release. This explains why the selected approach meets the requirement rather than merely changing a nearby service. A confirming observation is: ci rejects a deliberately wrong rounding result in a test fixture.

Incorrect Answers

A:

SQL Database Projects describe a target schema in source-controlled definitions. That principle is applicable when developers need a versioned declarative SQL schema they can build in CI without relying on a production database export. It does not explain the selected change in the current case, which depends on database tests validate function behavior and cross-object interactions before release.

C:

Secret-management and identity controls prevent credentials from being committed as plaintext. That principle is applicable when a CI deployment job currently stores an Azure SQL administrative password in repository YAML. It does not explain the selected change in the current case, which depends on database tests validate function behavior and cross-object interactions before release.

D:

Protected changes route sensitive schema and permission updates through accountable review. That principle is applicable when production database release must require security review for permission changes and approval from designated code owners. It does not explain the selected change in the current case, which depends on database tests validate function behavior and cross-object interactions before release.

Question 247

A staging acceptance test is being designed for this change: Add repeatable database unit tests for edge cases and integration tests for table contracts. The check must catch this potential failure: Deploying first and relying on dashboard anomalies finds defects too late. Which observed outcome demonstrates the desired behavior?

  1. A staging deployment succeeds without dropping or corrupting incompatible rows
  2. A drift report flags the index and release review makes a deliberate decision
  3. CI rejects a deliberately wrong rounding result in a test fixture
  4. A dry run shows zero values exceeding the new length before alteration

Explanation

Correct Answer

C:

CI rejects a deliberately wrong rounding result in a test fixture. This is the direct acceptance criterion because database tests validate function behavior and cross-object interactions before release. The validation should also distinguish the failure condition: deploying first and relying on dashboard anomalies finds defects too late.

Incorrect Answers

A:

A staging deployment succeeds without dropping or corrupting incompatible rows. That observation would validate a different requirement: an approved database schema project contains a nullable-to-not-null change needing a safe production rollout. Here the required evidence is cI rejects a deliberately wrong rounding result in a test fixture.

B:

A drift report flags the index and release review makes a deliberate decision. That observation would validate a different requirement: a developer hotfixed an index directly on production, and the next declarative deployment proposes removing it. Here the required evidence is cI rejects a deliberately wrong rounding result in a test fixture.

D:

A dry run shows zero values exceeding the new length before alteration. That observation would validate a different requirement: a release changes a populated varchar column to a narrower length and could truncate existing customer identifiers. Here the required evidence is cI rejects a deliberately wrong rounding result in a test fixture.

Question 248

The production rollout exhibits this defect: Deploying first and relying on dashboard anomalies finds defects too late. The actual requirement is: A new stored procedure calculates order totals and the CI job must catch incorrect tax rounding before deployment. Which corrective implementation addresses the cause?

  1. Store the SQL Database Project in an approved source-control repository
  2. Run schema comparison or drift-detection checks against the source-controlled SQL project model
  3. Manage static lookup data in source control with reviewed seed or migration scripts
  4. Add repeatable database unit tests for edge cases and integration tests for table contracts

Explanation

Correct Answer

D:

Add repeatable database unit tests for edge cases and integration tests for table contracts. Database tests validate function behavior and cross-object interactions before release. This directly corrects the observed failure, and success can be checked because cI rejects a deliberately wrong rounding result in a test fixture.

Incorrect Answers

A:

Version control records schema history, contributors and reviewed changes. Although relevant to a team has database definition scripts on local laptops but needs traceable reviews and restore points, this action would not correct the recorded production failure: deploying first and relying on dashboard anomalies finds defects too late. Use the target remedy instead.

B:

Drift detection identifies differences between expected and actual database definitions. Although relevant to someone changed a database view directly in production and the project model no longer matches its target, this action would not correct the recorded production failure: deploying first and relying on dashboard anomalies finds defects too late. Use the target remedy instead.

C:

Versioned reference-data changes make environment state reproducible and auditable. Although relevant to a production reference table contains shipping status codes that must be versioned and reproducible in each environment, this action would not correct the recorded production failure: deploying first and relying on dashboard anomalies finds defects too late. Use the target remedy instead.

Question 249

The SQL platform team receives the following production requirement: A production reference table contains shipping status codes that must be versioned and reproducible in each environment. Which implementation best satisfies this requirement?

  1. Manage static lookup data in source control with reviewed seed or migration scripts
  2. Build a deployment plan, validate data compatibility and deploy the reviewed SQL project package
  3. Create and validate a SQL Database Project with its supported SDK-style model and build process
  4. Run predeployment validation, migrate incompatible rows and use staged deployment controls

Explanation

Correct Answer

A:

Versioned reference-data changes make environment state reproducible and auditable. For this stated production need, the recommended implementation is: Manage static lookup data in source control with reviewed seed or migration scripts. Evidence to look for: a fresh deployment recreates the expected status codes consistently.

Incorrect Answers

B:

Project deployment computes target changes, but data compatibility and migration safety still require review. That method solves a different requirement: an approved database schema project contains a nullable-to-not-null change needing a safe production rollout. The current case instead requires manage static lookup data in source control with reviewed seed or migration scripts.

C:

SQL Database Projects describe a target schema in source-controlled definitions. That method solves a different requirement: developers need a versioned declarative SQL schema they can build in CI without relying on a production database export. The current case instead requires manage static lookup data in source control with reviewed seed or migration scripts.

D:

Schema changes must be data-compatible as well as syntactically valid. That method solves a different requirement: a release changes a populated varchar column to a narrower length and could truncate existing customer identifiers. The current case instead requires manage static lookup data in source control with reviewed seed or migration scripts.

Question 250

The design document proposes the following implementation: Manage static lookup data in source control with reviewed seed or migration scripts. Given that a production reference table contains shipping status codes that must be versioned and reproducible in each environment. Which technical principle most directly explains why it works?

  1. Protected changes route sensitive schema and permission updates through accountable review
  2. Versioned reference-data changes make environment state reproducible and auditable
  3. Integration validation tests schema dependencies after resolving branch conflicts
  4. Schema integration tests catch contract changes between related database objects

Explanation

Correct Answer

B:

Versioned reference-data changes make environment state reproducible and auditable. This explains why the selected approach meets the requirement rather than merely changing a nearby service. A confirming observation is: a fresh deployment recreates the expected status codes consistently.

Incorrect Answers

A:

Protected changes route sensitive schema and permission updates through accountable review. That principle is applicable when production database release must require security review for permission changes and approval from designated code owners. It does not explain the selected change in the current case, which depends on versioned reference-data changes make environment state reproducible and auditable.

C:

Integration validation tests schema dependencies after resolving branch conflicts. That principle is applicable when database developers create parallel feature branches and a migration references an object changed by another branch. It does not explain the selected change in the current case, which depends on versioned reference-data changes make environment state reproducible and auditable.

D:

Schema integration tests catch contract changes between related database objects. That principle is applicable when an accounting schema change should fail CI if a migration removes a required foreign key. It does not explain the selected change in the current case, which depends on versioned reference-data changes make environment state reproducible and auditable.

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

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