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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
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Developing AI-Enabled Database Solutions DP-800 Practice Test 13

Question 120

The production rollout exhibits this defect: SELECT MAX(id)+1 from a shared table creates race conditions. The actual requirement is: A ticketing service needs unique monotonic numeric identifiers across multiple inserting sessions without using a table-wide MAX-plus-one lookup. Which corrective implementation addresses the cause?

  1. Use SQL ledger tables and verify their cryptographic digests through the supported ledger verification workflow
  2. Add a UNIQUE constraint or suitable unique index on the external invoice number
  3. Add a CHECK constraint enforcing Quantity greater than zero on the table
  4. Create a database SEQUENCE and request NEXT VALUE FOR it during insertion

Explanation

Correct Answer

D:

Create a database SEQUENCE and request NEXT VALUE FOR it during insertion. A sequence allocates values independently of a user-managed maximum and can cache allocations. This directly corrects the observed failure, and success can be checked because concurrent inserts receive distinct allocated sequence numbers under normal use.

Incorrect Answers

A:

Ledger records support tamper-evidence through transaction history and cryptographic verification. Although relevant to a SQL Server compliance ledger must provide tamper-evidence for historical financial entries without trusting application logs alone, this action would not correct the recorded production failure: sELECT MAX(id)+1 from a shared table creates race conditions. Use the target remedy instead.

B:

Uniqueness is enforced by the engine for all database clients, including concurrent sessions. Although relevant to a billing app must ensure no two invoices share the same external invoice number across concurrent writers, this action would not correct the recorded production failure: sELECT MAX(id)+1 from a shared table creates race conditions. Use the target remedy instead.

C:

Database constraints protect invariants across all writers rather than one application path. Although relevant to an order service must reject negative quantities even when callers bypass the API and write directly to the database, this action would not correct the recorded production failure: sELECT MAX(id)+1 from a shared table creates race conditions. Use the target remedy instead.

Question 121

The SQL platform team receives the following production requirement: A SQL Server fact table contains several years of events and data managers need to switch out one closed month for archival. Which implementation best satisfies this requirement?

  1. Align partition function, scheme, table and necessary indexes on the monthly boundary
  2. Use SQL ledger tables and verify their cryptographic digests through the supported ledger verification workflow
  3. Extract the queried JSON property into an indexable expression or supported JSON index strategy after evaluating the platform
  4. Add a CHECK constraint enforcing Quantity greater than zero on the table

Explanation

Correct Answer

A:

Aligned partitioning permits supported partition-level data movement and pruning. For this stated production need, the recommended implementation is: Align partition function, scheme, table and necessary indexes on the monthly boundary. Evidence to look for: the closed monthly partition can be managed without touching unrelated months.

Incorrect Answers

B:

Ledger records support tamper-evidence through transaction history and cryptographic verification. That method solves a different requirement: a SQL Server compliance ledger must provide tamper-evidence for historical financial entries without trusting application logs alone. The current case instead requires align partition function, scheme, table and necessary indexes on the monthly boundary.

C:

Indexable JSON access paths reduce repeated full parsing and scans for selective property filters. That method solves a different requirement: an Azure SQL customer table stores JSON preferences and filters thousands of times per hour by a commonly queried country property. The current case instead requires align partition function, scheme, table and necessary indexes on the monthly boundary.

D:

Database constraints protect invariants across all writers rather than one application path. That method solves a different requirement: an order service must reject negative quantities even when callers bypass the API and write directly to the database. The current case instead requires align partition function, scheme, table and necessary indexes on the monthly boundary.

Question 122

The design document proposes the following implementation: Align partition function, scheme, table and necessary indexes on the monthly boundary. Given that a SQL Server fact table contains several years of events and data managers need to switch out one closed month for archival. Which technical principle most directly explains why it works?

  1. A seekable leading equality predicate followed by a range predicate can reduce the rows examined
  2. Aligned partitioning permits supported partition-level data movement and pruning
  3. A sequence allocates values independently of a user-managed maximum and can cache allocations
  4. Indexable computed expressions can expose selective expression predicates to the optimizer

Explanation

Correct Answer

B:

Aligned partitioning permits supported partition-level data movement and pruning. This explains why the selected approach meets the requirement rather than merely changing a nearby service. A confirming observation is: the closed monthly partition can be managed without touching unrelated months.

Incorrect Answers

A:

A seekable leading equality predicate followed by a range predicate can reduce the rows examined. That principle is applicable when an Azure SQL reporting table has 40 million sales rows; queries filter by TenantId and recent OrderDate but repeatedly scan the heap. It does not explain the selected change in the current case, which depends on aligned partitioning permits supported partition-level data movement and pruning.

C:

A sequence allocates values independently of a user-managed maximum and can cache allocations. That principle is applicable when a ticketing service needs unique monotonic numeric identifiers across multiple inserting sessions without using a table-wide MAX-plus-one lookup. It does not explain the selected change in the current case, which depends on aligned partitioning permits supported partition-level data movement and pruning.

D:

Indexable computed expressions can expose selective expression predicates to the optimizer. That principle is applicable when a SQL query repeatedly filters on a normalized expression of an indexed business key and the runtime repeatedly computes the expression. It does not explain the selected change in the current case, which depends on aligned partitioning permits supported partition-level data movement and pruning.

Question 123

A release reviewer must verify the effect of this implementation: Align partition function, scheme, table and necessary indexes on the monthly boundary. The check must catch this potential failure: A regular index on event date alone does not make table partitions switchable. Which observed outcome demonstrates the desired behavior?

  1. Valid nested region values appear and missing paths receive the expected null handling
  2. A second INSERT using an existing invoice number is rejected
  3. The closed monthly partition can be managed without touching unrelated months
  4. Analytic SUM and GROUP BY queries use columnstore access with lower CPU and I/O

Explanation

Correct Answer

C:

The closed monthly partition can be managed without touching unrelated months. This is the direct acceptance criterion because aligned partitioning permits supported partition-level data movement and pruning. The validation should also distinguish the failure condition: a regular index on event date alone does not make table partitions switchable.

Incorrect Answers

A:

Valid nested region values appear and missing paths receive the expected null handling. That observation would validate a different requirement: an application accepts customer preference JSON, and a read query must return a scalar nested region safely from each document. Here the required evidence is the closed monthly partition can be managed without touching unrelated months.

B:

A second INSERT using an existing invoice number is rejected. That observation would validate a different requirement: a billing app must ensure no two invoices share the same external invoice number across concurrent writers. Here the required evidence is the closed monthly partition can be managed without touching unrelated months.

D:

Analytic SUM and GROUP BY queries use columnstore access with lower CPU and I/O. That observation would validate a different requirement: a SQL Server analytics workload aggregates hundreds of millions of mostly read-only event rows, and a rowstore scan is expensive. Here the required evidence is the closed monthly partition can be managed without touching unrelated months.

Question 124

A regression is reported after deployment: A regular index on event date alone does not make table partitions switchable. The actual requirement is: A SQL Server fact table contains several years of events and data managers need to switch out one closed month for archival. Which corrective implementation addresses the cause?

  1. Use a system-versioned temporal table and a FOR SYSTEM_TIME query for historical versions
  2. Use SQL ledger tables and verify their cryptographic digests through the supported ledger verification workflow
  3. Extract the queried JSON property into an indexable expression or supported JSON index strategy after evaluating the platform
  4. Align partition function, scheme, table and necessary indexes on the monthly boundary

Explanation

Correct Answer

D:

Align partition function, scheme, table and necessary indexes on the monthly boundary. Aligned partitioning permits supported partition-level data movement and pruning. This directly corrects the observed failure, and success can be checked because the closed monthly partition can be managed without touching unrelated months.

Incorrect Answers

A:

Temporal tables automatically retain row histories according to their versioning contract. Although relevant to a SQL Server help desk must query an account's value as it existed at a previous point in time after legitimate updates, this action would not correct the recorded production failure: a regular index on event date alone does not make table partitions switchable. Use the target remedy instead.

B:

Ledger records support tamper-evidence through transaction history and cryptographic verification. Although relevant to a SQL Server compliance ledger must provide tamper-evidence for historical financial entries without trusting application logs alone, this action would not correct the recorded production failure: a regular index on event date alone does not make table partitions switchable. Use the target remedy instead.

C:

Indexable JSON access paths reduce repeated full parsing and scans for selective property filters. Although relevant to an Azure SQL customer table stores JSON preferences and filters thousands of times per hour by a commonly queried country property, this action would not correct the recorded production failure: a regular index on event date alone does not make table partitions switchable. Use the target remedy instead.

Question 125

Before approving the database change, the architect reviews this case: A database team wants analysts to see an approved projection of customer records without receiving direct permission on the base table. Which implementation best satisfies this requirement?

  1. Create a view exposing only the approved columns and grant access to the view
  2. Create a targeted AFTER UPDATE trigger that records appropriate audit details without recursively altering data
  3. Implement a parameterized inline table-valued function returning a table expression
  4. Create a scalar function with a single scalar return value where reusable SQL abstraction is justified

Explanation

Correct Answer

A:

Views provide a stable query surface and can mediate projection and permissions. For this stated production need, the recommended implementation is: Create a view exposing only the approved columns and grant access to the view. Evidence to look for: analyst queries return the allowed projection without direct base-table select permission.

Incorrect Answers

B:

A DML trigger executes in response to the table modification within its transaction. That method solves a different requirement: a regulated SQL table must populate a change-audit table automatically when an UPDATE occurs even from legacy applications. The current case instead requires create a view exposing only the approved columns and grant access to the view.

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 view exposing only the approved columns and grant access to the view.

D:

A scalar function encapsulates a reusable value calculation that can be invoked in expressions. That method solves a different requirement: the invoice query repeats a deterministic expression returning a single derived tax band for each row. The current case instead requires create a view exposing only the approved columns and grant access to the view.

Question 126

The security and data engineering reviewers accept this action: Create a view exposing only the approved columns and grant access to the view. Given that a database team wants analysts to see an approved projection of customer records without receiving direct permission on the base table. Which technical principle most directly explains why it works?

  1. TVPs carry sets of strongly typed rows across a procedure call
  2. Views provide a stable query surface and can mediate projection and permissions
  3. Stored procedures encapsulate multi-statement database operations and their execution contract
  4. Triggers operate on sets of inserted and deleted rows and may interact through nested DML

Explanation

Correct Answer

B:

Views provide a stable query surface and can mediate projection and permissions. This explains why the selected approach meets the requirement rather than merely changing a nearby service. A confirming observation is: analyst queries return the allowed projection without direct base-table select permission.

Incorrect Answers

A:

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 views provide a stable query surface and can mediate projection and permissions.

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 views provide a stable query surface and can mediate projection and permissions.

D:

Triggers operate on sets of inserted and deleted rows and may interact through nested DML. That principle is applicable when an AFTER UPDATE audit trigger writes to an audit table but accidentally invokes another trigger and causes repeated writes. It does not explain the selected change in the current case, which depends on views provide a stable query surface and can mediate projection and permissions.

Question 127

An incident post-change check is required for this fix: Create a view exposing only the approved columns and grant access to the view. The check must catch this potential failure: Granting SELECT on the entire base table reveals unapproved attributes. Which observed outcome demonstrates the desired behavior?

  1. SELECT from the TVF returns only rows for the supplied account parameter
  2. A multirow UPDATE creates precisely the intended audit rows without recursion
  3. Analyst queries return the allowed projection without direct base-table SELECT permission
  4. A test call commits all reservation steps or rolls back on failure

Explanation

Correct Answer

C:

Analyst queries return the allowed projection without direct base-table SELECT permission. This is the direct acceptance criterion because views provide a stable query surface and can mediate projection and permissions. The validation should also distinguish the failure condition: granting SELECT on the entire base table reveals unapproved attributes.

Incorrect Answers

A:

SELECT from the TVF returns only rows for the supplied account parameter. That observation would validate a different requirement: a multi-tenant report must call a reusable parameterized query returning all invoices for a requested account. Here the required evidence is analyst queries return the allowed projection without direct base-table SELECT permission.

B:

A multirow UPDATE creates precisely the intended audit rows without recursion. That observation would validate a different requirement: an AFTER UPDATE audit trigger writes to an audit table but accidentally invokes another trigger and causes repeated writes. Here the required evidence is analyst queries return the allowed projection without direct base-table SELECT permission.

D:

A test call commits all reservation steps or rolls back on failure. That observation would validate a different requirement: order registration must validate stock, insert a reservation, and return a status through one managed database interface. Here the required evidence is analyst queries return the allowed projection without direct base-table SELECT permission.

Question 128

The operational test fails because: Granting SELECT on the entire base table reveals unapproved attributes. The actual requirement is: A database team wants analysts to see an approved projection of customer records without receiving direct permission on the base table. Which corrective implementation addresses the cause?

  1. Use a table-valued parameter of a defined user table type for the procedure
  2. Implement a stored procedure with explicit parameters and transactional error handling
  3. Limit trigger scope and prevent unwanted nested or recursive behavior while testing multirow updates
  4. Create a view exposing only the approved columns and grant access to the view

Explanation

Correct Answer

D:

Create a view exposing only the approved columns and grant access to the view. Views provide a stable query surface and can mediate projection and permissions. This directly corrects the observed failure, and success can be checked because analyst queries return the allowed projection without direct base-table SELECT permission.

Incorrect Answers

A:

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: granting SELECT on the entire base table reveals unapproved attributes. 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: granting SELECT on the entire base table reveals unapproved attributes. Use the target remedy instead.

C:

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: granting SELECT on the entire base table reveals unapproved attributes. Use the target remedy instead.

Question 129

A cross-functional engineering review records the following need: The invoice query repeats a deterministic expression returning a single derived tax band for each row. Which implementation best satisfies this requirement?

  1. Create a scalar function with a single scalar return value where reusable SQL abstraction is justified
  2. Create a view exposing only the approved columns and grant access to the view
  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

A:

A scalar function encapsulates a reusable value calculation that can be invoked in expressions. For this stated production need, the recommended implementation is: Create a scalar function with a single scalar return value where reusable SQL abstraction is justified. Evidence to look for: the function returns the expected one-value tax band for test inputs.

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 scalar function with a single scalar return value where reusable SQL abstraction is justified.

C:

A DML trigger executes in response to the table modification within its transaction. That method solves a different requirement: a regulated SQL table must populate a change-audit table automatically when an UPDATE occurs even from legacy applications. The current case instead requires create a scalar function with a single scalar return value where reusable SQL abstraction is justified.

D:

Stored procedures encapsulate multi-statement database operations and their execution contract. That method solves a different requirement: order registration must validate stock, insert a reservation, and return a status through one managed database interface. The current case instead requires create a scalar function with a single scalar return value where reusable SQL abstraction is justified.

Question 130

The database team applies the following decision: Create a scalar function with a single scalar return value where reusable SQL abstraction is justified. Given that the invoice query repeats a deterministic expression returning a single derived tax band for each row. Which technical principle most directly explains why it works?

  1. A view can separate consumer query contracts from physical table organization
  2. A scalar function encapsulates a reusable value calculation that can be invoked in expressions
  3. TVPs carry sets of strongly typed rows across a procedure call
  4. Triggers operate on sets of inserted and deleted rows and may interact through nested DML

Explanation

Correct Answer

B:

A scalar function encapsulates a reusable value calculation that can be invoked in expressions. This explains why the selected approach meets the requirement rather than merely changing a nearby service. A confirming observation is: the function returns the expected one-value tax band for test inputs.

Incorrect Answers

A:

A view can separate consumer query contracts from physical table organization. That principle is applicable when several applications depend on an existing reporting view while underlying normalized tables need to be refactored. It does not explain the selected change in the current case, which depends on a scalar function encapsulates a reusable value calculation that can be invoked in expressions.

C:

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 scalar function encapsulates a reusable value calculation that can be invoked in expressions.

D:

Triggers operate on sets of inserted and deleted rows and may interact through nested DML. That principle is applicable when an AFTER UPDATE audit trigger writes to an audit table but accidentally invokes another trigger and causes repeated writes. It does not explain the selected change in the current case, which depends on a scalar function encapsulates a reusable value calculation that can be invoked in expressions.

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

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