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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 13

Question 120

An application repeats multi-statement order creation logic in many services with inconsistent transactions. Which result would provide the strongest acceptance evidence?

  1. Consumers query current source rows through the same named projection.
  2. An attempted update of approved records is rejected with a clear error while draft edits remain possible.
  3. The query returns the expected extracted token and handles missing matches correctly.
  4. Successful calls commit all intended records; injected failures leave none partially committed.

Explanation

Correct Answer

D:

Stored procedures support parameterized transactional operations and shared business enforcement. The observation “Successful calls commit all intended records; injected failures leave none partially committed” directly confirms the chosen action worked for this situation: An application repeats multi-statement order creation logic in many services with inconsistent transactions.

Incorrect Answers

A:

A standard view stores query definition rather than a separately refreshed result set. This observation would not establish that the required result occurred for An application repeats multi-statement order creation logic in many services with inconsistent transactions. The confirming test is: Successful calls commit all intended records; injected failures leave none partially committed.

B:

State-dependent protections need carefully tested enforcement; triggers must handle statement sets and errors. This observation would not establish that the required result occurred for An application repeats multi-statement order creation logic in many services with inconsistent transactions. The confirming test is: Successful calls commit all intended records; injected failures leave none partially committed.

C:

REGEXP_SUBSTR extracts matching text; REGEXP_LIKE only evaluates whether a match exists. This observation would not establish that the required result occurred for An application repeats multi-statement order creation logic in many services with inconsistent transactions. The confirming test is: Successful calls commit all intended records; injected failures leave none partially committed.

Question 121

A table update should automatically append a narrowly scoped event to a local audit table. What should the database team change FIRST for this workload?

  1. Use a carefully designed DML trigger operating on inserted and deleted sets.
  2. Move supported filtering, ordering, and pagination into SQL with stable sort keys.
  3. Implement narrow database-side enforcement with a constraint or trigger matched to the state-dependent rule.
  4. Record the selected supported model and tool context, then benchmark suggestions on a held-out SQL task set.

Explanation

Correct Answer

A:

SQL DML triggers fire per statement and must handle all affected rows, not only one inserted row. For the described situation—A table update should automatically append a narrowly scoped event to a local audit table—the targeted fix is Use a carefully designed DML trigger operating on inserted and deleted sets. A successful test should show: A multi-row update produces complete corresponding audit rows without unexpected recursion.

Incorrect Answers

B:

Set-based filtering and stable paging reduce unnecessary data movement; paging without deterministic order can skip or repeat rows. But that technique does not solve the stated problem—A table update should automatically append a narrowly scoped event to a local audit table. The needed intervention is Use a carefully designed DML trigger operating on inserted and deleted sets.

C:

State-dependent protections need carefully tested enforcement; triggers must handle statement sets and errors. But that technique does not solve the stated problem—A table update should automatically append a narrowly scoped event to a local audit table. The needed intervention is Use a carefully designed DML trigger operating on inserted and deleted sets.

D:

AI model/tool selection influences responses, but only execution tests and review validate SQL correctness. But that technique does not solve the stated problem—A table update should automatically append a narrowly scoped event to a local audit table. The needed intervention is Use a carefully designed DML trigger operating on inserted and deleted sets.

Question 122

A table update should automatically append a narrowly scoped event to a local audit table. Which acceptance check should accompany the remediation?

  1. Unit tests confirm one value per supported argument combination without hidden mutations.
  2. A multi-row update produces complete corresponding audit rows without unexpected recursion.
  3. A batch update changes each intended row once and emits exactly the expected audit effects.
  4. A load test shows reduced contention and recovery behavior consistent with the chosen durability.

Explanation

Correct Answer

B:

SQL DML triggers fire per statement and must handle all affected rows, not only one inserted row. The observation “A multi-row update produces complete corresponding audit rows without unexpected recursion” directly confirms the chosen action worked for this situation: A table update should automatically append a narrowly scoped event to a local audit table.

Incorrect Answers

A:

A scalar function encapsulates a single-result expression, not a full transaction workflow. This observation would not establish that the required result occurred for A table update should automatically append a narrowly scoped event to a local audit table. The confirming test is: A multi-row update produces complete corresponding audit rows without unexpected recursion.

C:

Trigger recursion and row-at-a-time assumptions can create performance and correctness failures. This observation would not establish that the required result occurred for A table update should automatically append a narrowly scoped event to a local audit table. The confirming test is: A multi-row update produces complete corresponding audit rows without unexpected recursion.

D:

In-memory OLTP uses a different engine/index architecture and requires explicit feature/compatibility assessment. This observation would not establish that the required result occurred for A table update should automatically append a narrowly scoped event to a local audit table. The confirming test is: A multi-row update produces complete corresponding audit rows without unexpected recursion.

Question 123

The design requires a database-side reaction when rows change even if different applications perform the update. Which implementation most directly satisfies the stated requirement?

  1. Implement narrow database-side enforcement with a constraint or trigger matched to the state-dependent rule.
  2. Use a carefully designed DML trigger operating on inserted and deleted sets.
  3. Implement TRY...CATCH with rollback and THROW to surface the failure.
  4. Verify tenant, capacity, licensing, and supported Copilot in Fabric configuration before use.

Explanation

Correct Answer

B:

SQL DML triggers fire per statement and must handle all affected rows, not only one inserted row. For the described situation—The design requires a database-side reaction when rows change even if different applications perform the update—the targeted fix is Use a carefully designed DML trigger operating on inserted and deleted sets. A successful test should show: A multi-row update produces complete corresponding audit rows without unexpected recursion.

Incorrect Answers

A:

State-dependent protections need carefully tested enforcement; triggers must handle statement sets and errors. But that technique does not solve the stated problem—The design requires a database-side reaction when rows change even if different applications perform the update. The needed intervention is Use a carefully designed DML trigger operating on inserted and deleted sets.

C:

Suppressing SQL errors conceals failed transactions; THROW propagates a meaningful failure. But that technique does not solve the stated problem—The design requires a database-side reaction when rows change even if different applications perform the update. The needed intervention is Use a carefully designed DML trigger operating on inserted and deleted sets.

D:

Copilot availability depends on supported platform settings and entitlements, not only local IDE configuration. But that technique does not solve the stated problem—The design requires a database-side reaction when rows change even if different applications perform the update. The needed intervention is Use a carefully designed DML trigger operating on inserted and deleted sets.

Question 124

The design requires a database-side reaction when rows change even if different applications perform the update. What measurement or test best demonstrates that the requirement is satisfied?

  1. An insert against the view updates the expected base tables and rejects invalid mappings.
  2. The TVF joins efficiently to callers and returns correct results across parameter values.
  3. A multi-row update produces complete corresponding audit rows without unexpected recursion.
  4. The following SELECT references the CTE and returns the same rows without persistent objects.

Explanation

Correct Answer

C:

SQL DML triggers fire per statement and must handle all affected rows, not only one inserted row. The observation “A multi-row update produces complete corresponding audit rows without unexpected recursion” directly confirms the chosen action worked for this situation: The design requires a database-side reaction when rows change even if different applications perform the update.

Incorrect Answers

A:

INSTEAD OF logic replaces the direct DML action; AFTER logic runs after a supported modification. This observation would not establish that the required result occurred for The design requires a database-side reaction when rows change even if different applications perform the update. The confirming test is: A multi-row update produces complete corresponding audit rows without unexpected recursion.

B:

Inline TVFs can be expanded into the caller's plan and avoid unnecessary procedural materialization. This observation would not establish that the required result occurred for The design requires a database-side reaction when rows change even if different applications perform the update. The confirming test is: A multi-row update produces complete corresponding audit rows without unexpected recursion.

D:

A CTE is a named subquery scoped to a single following DML statement, not an automatic materialized table. This observation would not establish that the required result occurred for The design requires a database-side reaction when rows change even if different applications perform the update. The confirming test is: A multi-row update produces complete corresponding audit rows without unexpected recursion.

Question 125

A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables. What is the most defensible next technical action?

  1. Redesign the trigger to avoid recursive side effects and validate its multi-row behavior.
  2. Use a carefully designed DML trigger operating on inserted and deleted sets.
  3. Use an INSTEAD OF trigger where supported to implement the intended view-write translation.
  4. Declare a FOREIGN KEY from child OrderID to the parent order key.

Explanation

Correct Answer

C:

INSTEAD OF logic replaces the direct DML action; AFTER logic runs after a supported modification. For the described situation—A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables—the targeted fix is Use an INSTEAD OF trigger where supported to implement the intended view-write translation. A successful test should show: An insert against the view updates the expected base tables and rejects invalid mappings.

Incorrect Answers

A:

Trigger recursion and row-at-a-time assumptions can create performance and correctness failures. But that technique does not solve the stated problem—A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables. The needed intervention is Use an INSTEAD OF trigger where supported to implement the intended view-write translation.

B:

SQL DML triggers fire per statement and must handle all affected rows, not only one inserted row. But that technique does not solve the stated problem—A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables. The needed intervention is Use an INSTEAD OF trigger where supported to implement the intended view-write translation.

D:

A foreign key maintains referential integrity across transactions rather than relying on application checks. But that technique does not solve the stated problem—A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables. The needed intervention is Use an INSTEAD OF trigger where supported to implement the intended view-write translation.

Question 126

A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables. Which result distinguishes a successful implementation from a cosmetic change?

  1. The TVF joins efficiently to callers and returns correct results across parameter values.
  2. An attempted update of approved records is rejected with a clear error while draft edits remain possible.
  3. Benchmark shows fewer key lookups without excessive index size or DML regression.
  4. An insert against the view updates the expected base tables and rejects invalid mappings.

Explanation

Correct Answer

D:

INSTEAD OF logic replaces the direct DML action; AFTER logic runs after a supported modification. The observation “An insert against the view updates the expected base tables and rejects invalid mappings” directly confirms the chosen action worked for this situation: A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables.

Incorrect Answers

A:

Inline TVFs can be expanded into the caller's plan and avoid unnecessary procedural materialization. This observation would not establish that the required result occurred for A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables. The confirming test is: An insert against the view updates the expected base tables and rejects invalid mappings.

B:

State-dependent protections need carefully tested enforcement; triggers must handle statement sets and errors. This observation would not establish that the required result occurred for A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables. The confirming test is: An insert against the view updates the expected base tables and rejects invalid mappings.

C:

Excessively broad indexes increase storage and maintenance; covering columns should match measured workloads. This observation would not establish that the required result occurred for A database has an INSTEAD OF trigger on a view to translate controlled writes into base tables. The confirming test is: An insert against the view updates the expected base tables and rejects invalid mappings.

Question 127

The team assumes an AFTER trigger on the view could intercept inserts before base rows are written. Which solution is the most appropriate for the scenario?

  1. Use a scalar function when a single return value and performance constraints fit.
  2. Use an INSTEAD OF trigger where supported to implement the intended view-write translation.
  3. Move supported filtering, ordering, and pagination into SQL with stable sort keys.
  4. Use LEFT JOIN from customers to invoices and manage NULL totals appropriately.

Explanation

Correct Answer

B:

INSTEAD OF logic replaces the direct DML action; AFTER logic runs after a supported modification. For the described situation—The team assumes an AFTER trigger on the view could intercept inserts before base rows are written—the targeted fix is Use an INSTEAD OF trigger where supported to implement the intended view-write translation. A successful test should show: An insert against the view updates the expected base tables and rejects invalid mappings.

Incorrect Answers

A:

A scalar function encapsulates a single-result expression, not a full transaction workflow. But that technique does not solve the stated problem—The team assumes an AFTER trigger on the view could intercept inserts before base rows are written. The needed intervention is Use an INSTEAD OF trigger where supported to implement the intended view-write translation.

C:

Set-based filtering and stable paging reduce unnecessary data movement; paging without deterministic order can skip or repeat rows. But that technique does not solve the stated problem—The team assumes an AFTER trigger on the view could intercept inserts before base rows are written. The needed intervention is Use an INSTEAD OF trigger where supported to implement the intended view-write translation.

D:

Outer joins preserve unmatched left rows; aggregate semantics require choosing COUNT expressions carefully. But that technique does not solve the stated problem—The team assumes an AFTER trigger on the view could intercept inserts before base rows are written. The needed intervention is Use an INSTEAD OF trigger where supported to implement the intended view-write translation.

Question 128

The team assumes an AFTER trigger on the view could intercept inserts before base rows are written. What should a technical reviewer verify before approving completion?

  1. The app reads approved profile fields and cannot access restricted source columns.
  2. Calling the function in a relational query returns the expected multiple rows efficiently.
  3. Only customers meeting the aggregate threshold appear at the requested group granularity.
  4. An insert against the view updates the expected base tables and rejects invalid mappings.

Explanation

Correct Answer

D:

INSTEAD OF logic replaces the direct DML action; AFTER logic runs after a supported modification. The observation “An insert against the view updates the expected base tables and rejects invalid mappings” directly confirms the chosen action worked for this situation: The team assumes an AFTER trigger on the view could intercept inserts before base rows are written.

Incorrect Answers

A:

Views can provide a data-access interface when underlying object permissions are managed appropriately. This observation would not establish that the required result occurred for The team assumes an AFTER trigger on the view could intercept inserts before base rows are written. The confirming test is: An insert against the view updates the expected base tables and rejects invalid mappings.

B:

An inline TVF exposes a composable table expression whereas a scalar UDF returns one value. This observation would not establish that the required result occurred for The team assumes an AFTER trigger on the view could intercept inserts before base rows are written. The confirming test is: An insert against the view updates the expected base tables and rejects invalid mappings.

C:

HAVING filters groups after aggregation; WHERE filters source rows before aggregation. This observation would not establish that the required result occurred for The team assumes an AFTER trigger on the view could intercept inserts before base rows are written. The confirming test is: An insert against the view updates the expected base tables and rejects invalid mappings.

Question 129

An order total is recomputed for every row using a scalar UDF and execution becomes slow. What should the SQL developer implement after verifying the conditions?

  1. Prefer set-based expressions or an appropriate inline TVF after measuring query plans.
  2. Encapsulate approved multi-step logic in a stored procedure with explicit transaction/error handling.
  3. Implement TRY...CATCH with rollback and THROW to surface the failure.
  4. Use JSON_CONTAINS or an appropriate supported JSON-path predicate for the target version.

Explanation

Correct Answer

A:

Row-by-row function evaluation can inhibit query optimization; set-based evaluation often scales better. For the described situation—An order total is recomputed for every row using a scalar UDF and execution becomes slow—the targeted fix is Prefer set-based expressions or an appropriate inline TVF after measuring query plans. A successful test should show: The batch returns the same totals with lower CPU time on representative volumes.

Incorrect Answers

B:

Stored procedures support parameterized transactional operations and shared business enforcement. But that technique does not solve the stated problem—An order total is recomputed for every row using a scalar UDF and execution becomes slow. The needed intervention is Prefer set-based expressions or an appropriate inline TVF after measuring query plans.

C:

Suppressing SQL errors conceals failed transactions; THROW propagates a meaningful failure. But that technique does not solve the stated problem—An order total is recomputed for every row using a scalar UDF and execution becomes slow. The needed intervention is Prefer set-based expressions or an appropriate inline TVF after measuring query plans.

D:

JSON membership functions compare structured content, not formatting-dependent text substrings. But that technique does not solve the stated problem—An order total is recomputed for every row using a scalar UDF and execution becomes slow. The needed intervention is Prefer set-based expressions or an appropriate inline TVF after measuring query plans.

Question 130

An order total is recomputed for every row using a scalar UDF and execution becomes slow. Which verification finding is most specific to this scenario?

  1. Consumers query current source rows through the same named projection.
  2. The batch returns the same totals with lower CPU time on representative volumes.
  3. An insert against the view updates the expected base tables and rejects invalid mappings.
  4. The following SELECT references the CTE and returns the same rows without persistent objects.

Explanation

Correct Answer

B:

Row-by-row function evaluation can inhibit query optimization; set-based evaluation often scales better. The observation “The batch returns the same totals with lower CPU time on representative volumes” directly confirms the chosen action worked for this situation: An order total is recomputed for every row using a scalar UDF and execution becomes slow.

Incorrect Answers

A:

A standard view stores query definition rather than a separately refreshed result set. This observation would not establish that the required result occurred for An order total is recomputed for every row using a scalar UDF and execution becomes slow. The confirming test is: The batch returns the same totals with lower CPU time on representative volumes.

C:

INSTEAD OF logic replaces the direct DML action; AFTER logic runs after a supported modification. This observation would not establish that the required result occurred for An order total is recomputed for every row using a scalar UDF and execution becomes slow. The confirming test is: The batch returns the same totals with lower CPU time on representative volumes.

D:

A CTE is a named subquery scoped to a single following DML statement, not an automatic materialized table. This observation would not establish that the required result occurred for An order total is recomputed for every row using a scalar UDF and execution becomes slow. The confirming test is: The batch returns the same totals with lower CPU time on representative volumes.

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