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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 15

Question 140

A bulk status update activates an auditing trigger that performs unintended self-updates. What measurement or test best demonstrates that the requirement is satisfied?

  1. A batch update changes each intended row once and emits exactly the expected audit effects.
  2. One call handles all requested IDs consistently and reduces client/server round trips.
  3. A forced constraint error rolls back the unit of work and reaches the caller.
  4. True matches are found in the intended array or object path while nonmatches are excluded.

Explanation

Correct Answer

A:

Trigger recursion and row-at-a-time assumptions can create performance and correctness failures. The observation “A batch update changes each intended row once and emits exactly the expected audit effects” directly confirms the chosen action worked for this situation: A bulk status update activates an auditing trigger that performs unintended self-updates.

Incorrect Answers

B:

Table-valued parameters support multirow input to stored procedures without building unsafe dynamic SQL. This observation would not establish that the required result occurred for A bulk status update activates an auditing trigger that performs unintended self-updates. The confirming test is: A batch update changes each intended row once and emits exactly the expected audit effects.

C:

Suppressing SQL errors conceals failed transactions; THROW propagates a meaningful failure. This observation would not establish that the required result occurred for A bulk status update activates an auditing trigger that performs unintended self-updates. The confirming test is: A batch update changes each intended row once and emits exactly the expected audit effects.

D:

JSON membership functions compare structured content, not formatting-dependent text substrings. This observation would not establish that the required result occurred for A bulk status update activates an auditing trigger that performs unintended self-updates. The confirming test is: A batch update changes each intended row once and emits exactly the expected audit effects.

Question 141

A frequently queried customer summary needs filtered access without exposing internal salary columns. What is the most defensible next technical action?

  1. Create a least-privilege projection view and grant SELECT on only that interface.
  2. Implement narrow database-side enforcement with a constraint or trigger matched to the state-dependent rule.
  3. Create a view with the required SELECT and grant access appropriately.
  4. Verify tenant, capacity, licensing, and supported Copilot in Fabric configuration before use.

Explanation

Correct Answer

A:

Views can provide a data-access interface when underlying object permissions are managed appropriately. For the described situation—A frequently queried customer summary needs filtered access without exposing internal salary columns—the targeted fix is Create a least-privilege projection view and grant SELECT on only that interface. A successful test should show: The app reads approved profile fields and cannot access restricted source columns.

Incorrect Answers

B:

State-dependent protections need carefully tested enforcement; triggers must handle statement sets and errors. But that technique does not solve the stated problem—A frequently queried customer summary needs filtered access without exposing internal salary columns. The needed intervention is Create a least-privilege projection view and grant SELECT on only that interface.

C:

A standard view stores query definition rather than a separately refreshed result set. But that technique does not solve the stated problem—A frequently queried customer summary needs filtered access without exposing internal salary columns. The needed intervention is Create a least-privilege projection view and grant SELECT on only that interface.

D:

Copilot availability depends on supported platform settings and entitlements, not only local IDE configuration. But that technique does not solve the stated problem—A frequently queried customer summary needs filtered access without exposing internal salary columns. The needed intervention is Create a least-privilege projection view and grant SELECT on only that interface.

Question 142

A frequently queried customer summary needs filtered access without exposing internal salary columns. Which result distinguishes a successful implementation from a cosmetic change?

  1. One call handles all requested IDs consistently and reduces client/server round trips.
  2. The app reads approved profile fields and cannot access restricted source columns.
  3. A hostile quote-containing test is treated as data and does not alter SQL structure.
  4. Calculated balances reconcile to expected currency precision in regression tests.

Explanation

Correct Answer

B:

Views can provide a data-access interface when underlying object permissions are managed appropriately. The observation “The app reads approved profile fields and cannot access restricted source columns” directly confirms the chosen action worked for this situation: A frequently queried customer summary needs filtered access without exposing internal salary columns.

Incorrect Answers

A:

Table-valued parameters support multirow input to stored procedures without building unsafe dynamic SQL. This observation would not establish that the required result occurred for A frequently queried customer summary needs filtered access without exposing internal salary columns. The confirming test is: The app reads approved profile fields and cannot access restricted source columns.

C:

Parameterized dynamic SQL separates values from executable statements and reduces injection risk. This observation would not establish that the required result occurred for A frequently queried customer summary needs filtered access without exposing internal salary columns. The confirming test is: The app reads approved profile fields and cannot access restricted source columns.

D:

Binary floating point is approximate whereas fixed-precision decimal represents defined decimal places. This observation would not establish that the required result occurred for A frequently queried customer summary needs filtered access without exposing internal salary columns. The confirming test is: The app reads approved profile fields and cannot access restricted source columns.

Question 143

A data API should retrieve public profile attributes but not all sensitive columns of the base table. Which solution is the most appropriate for the scenario?

  1. Prefer an inline TVF where composability and execution plan behavior are appropriate.
  2. Create a least-privilege projection view and grant SELECT on only that interface.
  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:

Views can provide a data-access interface when underlying object permissions are managed appropriately. For the described situation—A data API should retrieve public profile attributes but not all sensitive columns of the base table—the targeted fix is Create a least-privilege projection view and grant SELECT on only that interface. A successful test should show: The app reads approved profile fields and cannot access restricted source columns.

Incorrect Answers

A:

Inline TVFs can be expanded into the caller's plan and avoid unnecessary procedural materialization. But that technique does not solve the stated problem—A data API should retrieve public profile attributes but not all sensitive columns of the base table. The needed intervention is Create a least-privilege projection view and grant SELECT on only that interface.

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—A data API should retrieve public profile attributes but not all sensitive columns of the base table. The needed intervention is Create a least-privilege projection view and grant SELECT on only that interface.

D:

Outer joins preserve unmatched left rows; aggregate semantics require choosing COUNT expressions carefully. But that technique does not solve the stated problem—A data API should retrieve public profile attributes but not all sensitive columns of the base table. The needed intervention is Create a least-privilege projection view and grant SELECT on only that interface.

Question 144

A data API should retrieve public profile attributes but not all sensitive columns of the base table. What should a technical reviewer verify before approving completion?

  1. Unit tests confirm one value per supported argument combination without hidden mutations.
  2. Calling the function in a relational query returns the expected multiple rows efficiently.
  3. The app reads approved profile fields and cannot access restricted source columns.
  4. Every order has a unique identifier and child rows can reference a single parent.

Explanation

Correct Answer

C:

Views can provide a data-access interface when underlying object permissions are managed appropriately. The observation “The app reads approved profile fields and cannot access restricted source columns” directly confirms the chosen action worked for this situation: A data API should retrieve public profile attributes but not all sensitive columns of the base 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 data API should retrieve public profile attributes but not all sensitive columns of the base table. The confirming test is: The app reads approved profile fields and cannot access restricted source columns.

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 A data API should retrieve public profile attributes but not all sensitive columns of the base table. The confirming test is: The app reads approved profile fields and cannot access restricted source columns.

D:

A PRIMARY KEY guarantees unique non-null identity whereas a display label may change or duplicate. This observation would not establish that the required result occurred for A data API should retrieve public profile attributes but not all sensitive columns of the base table. The confirming test is: The app reads approved profile fields and cannot access restricted source columns.

Question 145

A routine must validate a set of invoice IDs supplied from the application and return their processing statuses. What should the SQL developer implement after verifying the conditions?

  1. Implement TRY...CATCH with rollback and THROW to surface the failure.
  2. Use a carefully designed DML trigger operating on inserted and deleted sets.
  3. Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported.
  4. Select Unicode-compatible text types and length/collation appropriate to actual multilingual data.

Explanation

Correct Answer

C:

Table-valued parameters support multirow input to stored procedures without building unsafe dynamic SQL. For the described situation—A routine must validate a set of invoice IDs supplied from the application and return their processing statuses—the targeted fix is Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported. A successful test should show: One call handles all requested IDs consistently and reduces client/server round trips.

Incorrect Answers

A:

Suppressing SQL errors conceals failed transactions; THROW propagates a meaningful failure. But that technique does not solve the stated problem—A routine must validate a set of invoice IDs supplied from the application and return their processing statuses. The needed intervention is Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported.

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 routine must validate a set of invoice IDs supplied from the application and return their processing statuses. The needed intervention is Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported.

D:

Data type and collation selection determine representability, comparisons, and index behavior. But that technique does not solve the stated problem—A routine must validate a set of invoice IDs supplied from the application and return their processing statuses. The needed intervention is Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported.

Question 146

A routine must validate a set of invoice IDs supplied from the application and return their processing statuses. Which verification finding is most specific to this scenario?

  1. An insert against the view updates the expected base tables and rejects invalid mappings.
  2. One call handles all requested IDs consistently and reduces client/server round trips.
  3. The batch returns the same totals with lower CPU time on representative volumes.
  4. Unsupported syntax is caught in a controlled environment before any production deployment.

Explanation

Correct Answer

B:

Table-valued parameters support multirow input to stored procedures without building unsafe dynamic SQL. The observation “One call handles all requested IDs consistently and reduces client/server round trips” directly confirms the chosen action worked for this situation: A routine must validate a set of invoice IDs supplied from the application and return their processing statuses.

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 A routine must validate a set of invoice IDs supplied from the application and return their processing statuses. The confirming test is: One call handles all requested IDs consistently and reduces client/server round trips.

C:

Row-by-row function evaluation can inhibit query optimization; set-based evaluation often scales better. This observation would not establish that the required result occurred for A routine must validate a set of invoice IDs supplied from the application and return their processing statuses. The confirming test is: One call handles all requested IDs consistently and reduces client/server round trips.

D:

AI suggestions can hallucinate features or ignore version differences; execution verification is essential. This observation would not establish that the required result occurred for A routine must validate a set of invoice IDs supplied from the application and return their processing statuses. The confirming test is: One call handles all requested IDs consistently and reduces client/server round trips.

Question 147

A service currently loops through individual stored procedure calls causing high round-trip latency. Which approach achieves the intended result without bypassing the stated controls?

  1. Implement narrow database-side enforcement with a constraint or trigger matched to the state-dependent rule.
  2. Return the inserted key via OUTPUT inserted or a suitable scope-aware identity mechanism.
  3. Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported.
  4. Use ROW_NUMBER with a complete tie-breaking ORDER BY inside the window.

Explanation

Correct Answer

C:

Table-valued parameters support multirow input to stored procedures without building unsafe dynamic SQL. For the described situation—A service currently loops through individual stored procedure calls causing high round-trip latency—the targeted fix is Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported. A successful test should show: One call handles all requested IDs consistently and reduces client/server round trips.

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—A service currently loops through individual stored procedure calls causing high round-trip latency. The needed intervention is Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported.

B:

MAX(Id) is unsafe for concurrent identity retrieval; OUTPUT ties returned keys to the statement. But that technique does not solve the stated problem—A service currently loops through individual stored procedure calls causing high round-trip latency. The needed intervention is Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported.

D:

ROW_NUMBER never assigns the same ordinal twice; deterministic tie-breaking stabilizes ordering. But that technique does not solve the stated problem—A service currently loops through individual stored procedure calls causing high round-trip latency. The needed intervention is Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported.

Question 148

A service currently loops through individual stored procedure calls causing high round-trip latency. How should the team validate the selected design?

  1. One call handles all requested IDs consistently and reduces client/server round trips.
  2. A multi-row update produces complete corresponding audit rows without unexpected recursion.
  3. Consumers query current source rows through the same named projection.
  4. Attempting to insert an orphaned line fails while valid parent references succeed.

Explanation

Correct Answer

A:

Table-valued parameters support multirow input to stored procedures without building unsafe dynamic SQL. The observation “One call handles all requested IDs consistently and reduces client/server round trips” directly confirms the chosen action worked for this situation: A service currently loops through individual stored procedure calls causing high round-trip latency.

Incorrect Answers

B:

SQL DML triggers fire per statement and must handle all affected rows, not only one inserted row. This observation would not establish that the required result occurred for A service currently loops through individual stored procedure calls causing high round-trip latency. The confirming test is: One call handles all requested IDs consistently and reduces client/server round trips.

C:

A standard view stores query definition rather than a separately refreshed result set. This observation would not establish that the required result occurred for A service currently loops through individual stored procedure calls causing high round-trip latency. The confirming test is: One call handles all requested IDs consistently and reduces client/server round trips.

D:

A foreign key maintains referential integrity across transactions rather than relying on application checks. This observation would not establish that the required result occurred for A service currently loops through individual stored procedure calls causing high round-trip latency. The confirming test is: One call handles all requested IDs consistently and reduces client/server round trips.

Question 149

A procedure builds an optional filter query by concatenating a user's search text into SQL. What intervention should the responsible engineer choose?

  1. Pass the intended identifiers in a table-valued parameter to a set-based procedure where supported.
  2. Implement narrow database-side enforcement with a constraint or trigger matched to the state-dependent rule.
  3. Use sp_executesql with typed parameters and allowlist any necessary object identifiers.
  4. Use supported JSON_ARRAYAGG or an equivalent validated JSON aggregation mechanism for that SQL version.

Explanation

Correct Answer

C:

Parameterized dynamic SQL separates values from executable statements and reduces injection risk. For the described situation—A procedure builds an optional filter query by concatenating a user's search text into SQL—the targeted fix is Use sp_executesql with typed parameters and allowlist any necessary object identifiers. A successful test should show: A hostile quote-containing test is treated as data and does not alter SQL structure.

Incorrect Answers

A:

Table-valued parameters support multirow input to stored procedures without building unsafe dynamic SQL. But that technique does not solve the stated problem—A procedure builds an optional filter query by concatenating a user's search text into SQL. The needed intervention is Use sp_executesql with typed parameters and allowlist any necessary object identifiers.

B:

State-dependent protections need carefully tested enforcement; triggers must handle statement sets and errors. But that technique does not solve the stated problem—A procedure builds an optional filter query by concatenating a user's search text into SQL. The needed intervention is Use sp_executesql with typed parameters and allowlist any necessary object identifiers.

D:

JSON array aggregation preserves JSON structure rather than emitting unsafe concatenated text. But that technique does not solve the stated problem—A procedure builds an optional filter query by concatenating a user's search text into SQL. The needed intervention is Use sp_executesql with typed parameters and allowlist any necessary object identifiers.

Question 150

A procedure builds an optional filter query by concatenating a user's search text into SQL. What observable outcome proves the recommendation worked?

  1. The app reads approved profile fields and cannot access restricted source columns.
  2. A forced constraint error rolls back the unit of work and reaches the caller.
  3. Duplicate non-null emails fail while multiple missing values behave per the documented rule.
  4. A hostile quote-containing test is treated as data and does not alter SQL structure.

Explanation

Correct Answer

D:

Parameterized dynamic SQL separates values from executable statements and reduces injection risk. The observation “A hostile quote-containing test is treated as data and does not alter SQL structure” directly confirms the chosen action worked for this situation: A procedure builds an optional filter query by concatenating a user's search text into SQL.

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 A procedure builds an optional filter query by concatenating a user's search text into SQL. The confirming test is: A hostile quote-containing test is treated as data and does not alter SQL structure.

B:

Suppressing SQL errors conceals failed transactions; THROW propagates a meaningful failure. This observation would not establish that the required result occurred for A procedure builds an optional filter query by concatenating a user's search text into SQL. The confirming test is: A hostile quote-containing test is treated as data and does not alter SQL structure.

C:

SQL Server UNIQUE and filtered unique indexes differ in how missing values can be represented. This observation would not establish that the required result occurred for A procedure builds an optional filter query by concatenating a user's search text into SQL. The confirming test is: A hostile quote-containing test is treated as data and does not alter SQL structure.

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