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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.
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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.
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Developing AI-Enabled Database Solutions DP-800 Practice Test 15

Question 140

A regression is reported after deployment: A read-only view cannot perform coordinated transactional modifications. The actual requirement is: Order registration must validate stock, insert a reservation, and return a status through one managed database interface. Which corrective implementation addresses the cause?

  1. Maintain a stable, explicitly defined view projection while changing its underlying implementation
  2. Limit trigger scope and prevent unwanted nested or recursive behavior while testing multirow updates
  3. Create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data
  4. Implement a stored procedure with explicit parameters and transactional error handling

Explanation

Correct Answer

D:

Implement a stored procedure with explicit parameters and transactional error handling. Stored procedures encapsulate multi-statement database operations and their execution contract. This directly corrects the observed failure, and success can be checked because a test call commits all reservation steps or rolls back on failure.

Incorrect Answers

A:

A view can separate consumer query contracts from physical table organization. Although relevant to several applications depend on an existing reporting view while underlying normalized tables need to be refactored, this action would not correct the recorded production failure: a read-only view cannot perform coordinated transactional modifications. Use the target remedy instead.

B:

Triggers operate on sets of inserted and deleted rows and may interact through nested DML. Although relevant to an AFTER UPDATE audit trigger writes to an audit table but accidentally invokes another trigger and causes repeated writes, this action would not correct the recorded production failure: a read-only view cannot perform coordinated transactional modifications. Use the target remedy instead.

C:

A DML trigger executes in response to the table modification within its transaction. Although relevant to a regulated SQL table must populate a change-audit table automatically when an UPDATE occurs even from legacy applications, this action would not correct the recorded production failure: a read-only view cannot perform coordinated transactional modifications. Use the target remedy instead.

Question 141

Before approving the database change, the architect reviews this case: A regulated SQL table must populate a change-audit table automatically when an UPDATE occurs even from legacy applications. Which implementation best satisfies this requirement?

  1. Create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data
  2. Create a view exposing only the approved columns and grant access to the view
  3. Implement a parameterized inline table-valued function returning a table expression
  4. Maintain a stable, explicitly defined view projection while changing its underlying implementation

Explanation

Correct Answer

A:

A DML trigger executes in response to the table modification within its transaction. For this stated production need, the recommended implementation is: Create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data. Evidence to look for: updating the base table automatically writes the intended audit row.

Incorrect Answers

B:

Views provide a stable query surface and can mediate projection and permissions. That method solves a different requirement: a database team wants analysts to see an approved projection of customer records without receiving direct permission on the base table. The current case instead requires create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data.

C:

An inline TVF exposes a composable rowset and can be joined or filtered by callers. That method solves a different requirement: a multi-tenant report must call a reusable parameterized query returning all invoices for a requested account. The current case instead requires create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data.

D:

A view can separate consumer query contracts from physical table organization. That method solves a different requirement: several applications depend on an existing reporting view while underlying normalized tables need to be refactored. The current case instead requires create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data.

Question 142

The security and data engineering reviewers accept this action: Create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data. Given that a regulated SQL table must populate a change-audit table automatically when an UPDATE occurs even from legacy applications. Which technical principle most directly explains why it works?

  1. A scalar function encapsulates a reusable value calculation that can be invoked in expressions
  2. A DML trigger executes in response to the table modification within its transaction
  3. Stored procedures encapsulate multi-statement database operations and their execution contract
  4. TVPs carry sets of strongly typed rows across a procedure call

Explanation

Correct Answer

B:

A DML trigger executes in response to the table modification within its transaction. This explains why the selected approach meets the requirement rather than merely changing a nearby service. A confirming observation is: updating the base table automatically writes the intended audit row.

Incorrect Answers

A:

A scalar function encapsulates a reusable value calculation that can be invoked in expressions. That principle is applicable when the invoice query repeats a deterministic expression returning a single derived tax band for each row. It does not explain the selected change in the current case, which depends on a DML trigger executes in response to the table modification within its transaction.

C:

Stored procedures encapsulate multi-statement database operations and their execution contract. That principle is applicable when order registration must validate stock, insert a reservation, and return a status through one managed database interface. It does not explain the selected change in the current case, which depends on a DML trigger executes in response to the table modification within its transaction.

D:

TVPs carry sets of strongly typed rows across a procedure call. That principle is applicable when an API must submit 500 inventory adjustments in one network call to a SQL Server stored procedure. It does not explain the selected change in the current case, which depends on a DML trigger executes in response to the table modification within its transaction.

Question 143

An incident post-change check is required for this fix: Create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data. The check must catch this potential failure: A scheduled report cannot guarantee an audit record for each modification. Which observed outcome demonstrates the desired behavior?

  1. The function returns the expected one-value tax band for test inputs
  2. The procedure processes the submitted batch with one call and validated row types
  3. Updating the base table automatically writes the intended audit row
  4. Applications keep receiving the same column contract after the table refactor

Explanation

Correct Answer

C:

Updating the base table automatically writes the intended audit row. This is the direct acceptance criterion because a DML trigger executes in response to the table modification within its transaction. The validation should also distinguish the failure condition: a scheduled report cannot guarantee an audit record for each modification.

Incorrect Answers

A:

The function returns the expected one-value tax band for test inputs. That observation would validate a different requirement: the invoice query repeats a deterministic expression returning a single derived tax band for each row. Here the required evidence is updating the base table automatically writes the intended audit row.

B:

The procedure processes the submitted batch with one call and validated row types. That observation would validate a different requirement: an API must submit 500 inventory adjustments in one network call to a SQL Server stored procedure. Here the required evidence is updating the base table automatically writes the intended audit row.

D:

Applications keep receiving the same column contract after the table refactor. That observation would validate a different requirement: several applications depend on an existing reporting view while underlying normalized tables need to be refactored. Here the required evidence is updating the base table automatically writes the intended audit row.

Question 144

The operational test fails because: A scheduled report cannot guarantee an audit record for each modification. The actual requirement is: A regulated SQL table must populate a change-audit table automatically when an UPDATE occurs even from legacy applications. Which corrective implementation addresses the cause?

  1. Create a scalar function with a single scalar return value where reusable SQL abstraction is justified
  2. Implement a stored procedure with explicit parameters and transactional error handling
  3. Use a table-valued parameter of a defined user table type for the procedure
  4. Create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data

Explanation

Correct Answer

D:

Create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data. A DML trigger executes in response to the table modification within its transaction. This directly corrects the observed failure, and success can be checked because updating the base table automatically writes the intended audit row.

Incorrect Answers

A:

A scalar function encapsulates a reusable value calculation that can be invoked in expressions. Although relevant to the invoice query repeats a deterministic expression returning a single derived tax band for each row, this action would not correct the recorded production failure: a scheduled report cannot guarantee an audit record for each modification. Use the target remedy instead.

B:

Stored procedures encapsulate multi-statement database operations and their execution contract. Although relevant to order registration must validate stock, insert a reservation, and return a status through one managed database interface, this action would not correct the recorded production failure: a scheduled report cannot guarantee an audit record for each modification. Use the target remedy instead.

C:

TVPs carry sets of strongly typed rows across a procedure call. Although relevant to an API must submit 500 inventory adjustments in one network call to a SQL Server stored procedure, this action would not correct the recorded production failure: a scheduled report cannot guarantee an audit record for each modification. Use the target remedy instead.

Question 145

A cross-functional engineering review records the following need: A report must navigate organizational parent-child relationships of unknown depth stored as EmployeeId and ManagerId. Which implementation best satisfies this requirement?

  1. Use a recursive common table expression with an anchor, recursive member and termination condition
  2. Use a correlated subquery or APPLY that evaluates the payment condition for each outer customer
  3. Use SUM(Amount) OVER with PARTITION BY CustomerId and an explicit ordered ROWS frame
  4. Use REGEXP_REPLACE with a reviewed pattern and replacement expression

Explanation

Correct Answer

A:

Recursive CTEs iteratively expand related rows until no further matches exist. For this stated production need, the recommended implementation is: Use a recursive common table expression with an anchor, recursive member and termination condition. Evidence to look for: the query returns all descendants without a hard-coded hierarchy depth.

Incorrect Answers

B:

A correlated expression binds outer-row values to its subquery evaluation. That method solves a different requirement: an invoice query must return clients whose most recent payment date is later than their own contract start date. The current case instead requires use a recursive common table expression with an anchor, recursive member and termination condition.

C:

An ordered window aggregation retains each invoice row while accumulating prior amounts. That method solves a different requirement: a billing report must show each invoice amount plus the running total per customer ordered by due date without collapsing invoice rows. The current case instead requires use a recursive common table expression with an anchor, recursive member and termination condition.

D:

Regular-expression replacement transforms matched substrings according to the pattern. That method solves a different requirement: a contact normalization job must remove punctuation from legacy phone strings using supported regex replacements. The current case instead requires use a recursive common table expression with an anchor, recursive member and termination condition.

Question 146

The database team applies the following decision: Use a recursive common table expression with an anchor, recursive member and termination condition. Given that a report must navigate organizational parent-child relationships of unknown depth stored as EmployeeId and ManagerId. Which technical principle most directly explains why it works?

  1. Regular-expression predicates test structured string patterns rather than simple substrings
  2. Recursive CTEs iteratively expand related rows until no further matches exist
  3. Equal ordered values share the same dense rank and all top ties survive
  4. LAG reads the prior ordered row in the same window partition

Explanation

Correct Answer

B:

Recursive CTEs iteratively expand related rows until no further matches exist. This explains why the selected approach meets the requirement rather than merely changing a nearby service. A confirming observation is: the query returns all descendants without a hard-coded hierarchy depth.

Incorrect Answers

A:

Regular-expression predicates test structured string patterns rather than simple substrings. That principle is applicable when a customer import must accept values matching a defined identifier format and reject nonmatching records using supported T-SQL regex features. It does not explain the selected change in the current case, which depends on recursive CTEs iteratively expand related rows until no further matches exist.

C:

Equal ordered values share the same dense rank and all top ties survive. That principle is applicable when a ranking report must display all salespeople tied for highest monthly sales. It does not explain the selected change in the current case, which depends on recursive CTEs iteratively expand related rows until no further matches exist.

D:

LAG reads the prior ordered row in the same window partition. That principle is applicable when an anomaly report should compare each machine's current reading to its immediately preceding reading in time. It does not explain the selected change in the current case, which depends on recursive CTEs iteratively expand related rows until no further matches exist.

Question 147

The deployment validation team is assessing this proposal: Use a recursive common table expression with an anchor, recursive member and termination condition. The check must catch this potential failure: A single self-join only follows a fixed number of levels. Which observed outcome demonstrates the desired behavior?

  1. One row per key remains and equal-timestamp ties resolve repeatably
  2. An induced error leaves no half-committed changes and the original error is surfaced
  3. The query returns all descendants without a hard-coded hierarchy depth
  4. Names containing quotation marks produce parseable output objects

Explanation

Correct Answer

C:

The query returns all descendants without a hard-coded hierarchy depth. This is the direct acceptance criterion because recursive CTEs iteratively expand related rows until no further matches exist. The validation should also distinguish the failure condition: a single self-join only follows a fixed number of levels.

Incorrect Answers

A:

One row per key remains and equal-timestamp ties resolve repeatably. That observation would validate a different requirement: an event ingestion table receives multiple versions for a natural key and must retain the latest ingestion timestamp deterministically. Here the required evidence is the query returns all descendants without a hard-coded hierarchy depth.

B:

An induced error leaves no half-committed changes and the original error is surfaced. That observation would validate a different requirement: a stored procedure catches a transaction error and must decide whether the transaction is committable before cleanup. Here the required evidence is the query returns all descendants without a hard-coded hierarchy depth.

D:

Names containing quotation marks produce parseable output objects. That observation would validate a different requirement: a SQL API needs to return one structured JSON object per customer instead of manually building a quoted string. Here the required evidence is the query returns all descendants without a hard-coded hierarchy depth.

Question 148

The reviewer rejects the current behavior: A single self-join only follows a fixed number of levels. The actual requirement is: A report must navigate organizational parent-child relationships of unknown depth stored as EmployeeId and ManagerId. Which corrective implementation addresses the cause?

  1. Use OPENJSON with an appropriate path and WITH schema for typed projected fields
  2. Use JSON_QUERY with the appropriate path to return the nested JSON fragment
  3. Calculate JARO_WINKLER_DISTANCE or an appropriate supported similarity measure and apply a reviewed threshold
  4. Use a recursive common table expression with an anchor, recursive member and termination condition

Explanation

Correct Answer

D:

Use a recursive common table expression with an anchor, recursive member and termination condition. Recursive CTEs iteratively expand related rows until no further matches exist. This directly corrects the observed failure, and success can be checked because the query returns all descendants without a hard-coded hierarchy depth.

Incorrect Answers

A:

OPENJSON expands JSON array entries into a relational rowset and can type columns. Although relevant to a service receives JSON arrays of product lines and must extract one relational row per array element in T-SQL, this action would not correct the recorded production failure: a single self-join only follows a fixed number of levels. Use the target remedy instead.

B:

JSON_QUERY returns an object or array fragment rather than the scalar extracted by JSON_VALUE. Although relevant to a SQL API must extract a nested JSON array of product attributes from each payload while preserving it as valid JSON, not a quoted scalar string, this action would not correct the recorded production failure: a single self-join only follows a fixed number of levels. Use the target remedy instead.

C:

Fuzzy matching scores approximate string similarity and should support human review of borderline cases. Although relevant to a supplier onboarding flow must detect spelling variants such as slightly different legal names for potential review rather than exact-match only, this action would not correct the recorded production failure: a single self-join only follows a fixed number of levels. Use the target remedy instead.

Question 149

A development review identifies this database requirement: A billing report must show each invoice amount plus the running total per customer ordered by due date without collapsing invoice rows. Which implementation best satisfies this requirement?

  1. Use SUM(Amount) OVER with PARTITION BY CustomerId and an explicit ordered ROWS frame
  2. Use a correlated EXISTS predicate against unpaid invoices
  3. Use a correlated subquery or APPLY that evaluates the payment condition for each outer customer
  4. Use a recursive common table expression with an anchor, recursive member and termination condition

Explanation

Correct Answer

A:

An ordered window aggregation retains each invoice row while accumulating prior amounts. For this stated production need, the recommended implementation is: Use SUM(Amount) OVER with PARTITION BY CustomerId and an explicit ordered ROWS frame. Evidence to look for: invoice rows remain present and their running totals increase in the intended order.

Incorrect Answers

B:

EXISTS tests whether a related row exists, without joining or repeating the parent. That method solves a different requirement: a report must include only customers who have at least one unpaid invoice without multiplying customer rows. The current case instead requires use SUM(Amount) OVER with PARTITION BY CustomerId and an explicit ordered ROWS frame.

C:

A correlated expression binds outer-row values to its subquery evaluation. That method solves a different requirement: an invoice query must return clients whose most recent payment date is later than their own contract start date. The current case instead requires use SUM(Amount) OVER with PARTITION BY CustomerId and an explicit ordered ROWS frame.

D:

Recursive CTEs iteratively expand related rows until no further matches exist. That method solves a different requirement: a report must navigate organizational parent-child relationships of unknown depth stored as EmployeeId and ManagerId. The current case instead requires use SUM(Amount) OVER with PARTITION BY CustomerId and an explicit ordered ROWS frame.

Question 150

The engineer chooses the following change: Use SUM(Amount) OVER with PARTITION BY CustomerId and an explicit ordered ROWS frame. Given that a billing report must show each invoice amount plus the running total per customer ordered by due date without collapsing invoice rows. Which technical principle most directly explains why it works?

  1. OPENJSON expands JSON array entries into a relational rowset and can type columns
  2. An ordered window aggregation retains each invoice row while accumulating prior amounts
  3. Native JSON constructors handle escaping and represent values structurally
  4. Regular-expression predicates test structured string patterns rather than simple substrings

Explanation

Correct Answer

B:

An ordered window aggregation retains each invoice row while accumulating prior amounts. This explains why the selected approach meets the requirement rather than merely changing a nearby service. A confirming observation is: invoice rows remain present and their running totals increase in the intended order.

Incorrect Answers

A:

OPENJSON expands JSON array entries into a relational rowset and can type columns. That principle is applicable when a service receives JSON arrays of product lines and must extract one relational row per array element in T-SQL. It does not explain the selected change in the current case, which depends on an ordered window aggregation retains each invoice row while accumulating prior amounts.

C:

Native JSON constructors handle escaping and represent values structurally. That principle is applicable when a SQL API needs to return one structured JSON object per customer instead of manually building a quoted string. It does not explain the selected change in the current case, which depends on an ordered window aggregation retains each invoice row while accumulating prior amounts.

D:

Regular-expression predicates test structured string patterns rather than simple substrings. That principle is applicable when a customer import must accept values matching a defined identifier format and reject nonmatching records using supported T-SQL regex features. It does not explain the selected change in the current case, which depends on an ordered window aggregation retains each invoice row while accumulating prior amounts.

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

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