DP-800 Microsoft Developing AI-Enabled Database Solutions Free Practice Exam Questions (2026 Updated)

The best recommendation is to use an MCP server . In the official DP-800 study guide , Microsoft explicitly lists skills such as configuring Model Context Protocol (MCP) tool options in a GitHub Copilot session and connecting to MCP server endpoints, including Microsoft SQL Server and Fabric Lakehouse . That makes MCP the exam-aligned mechanism for enabling AI-assisted tools to work with live database context rather than static snapshots.

This also matches the stated development requirement: the team will use Visual Studio Code and GitHub Copilot and needs to retrieve live metadata from the databases . Microsoft’s documentation for GitHub Copilot with the MSSQL extension explains that Copilot works with an active database connection , provides schema-aware suggestions , supports chatting with a connected database, and adapts responses based on the current database context . Microsoft also documents MCP as the standard way for AI tools to connect to external systems and data sources through discoverable tools and endpoints.

The other options do not satisfy the “live metadata” requirement as well:

A .dacpac is a point-in-time schema artifact, not live metadata.

A Copilot instruction file provides guidance, not live database discovery.

Including the database project in the repository helps source control and deployment, but it still does not provide live database metadata by itself.

The best recommendation is B because the slow query filters on FleetId and returns LastUpdatedUtc , EngineStatus , and BatteryHealth . A nonclustered index with FleetId as the key column allows the optimizer to perform an index seek instead of a clustered index scan, and including the other selected columns makes the index covering , which reduces extra lookups and I/O. Microsoft’s SQL Server indexing guidance states that a nonclustered index with included columns can significantly improve performance when all query columns are available in the index, because the optimizer can satisfy the query directly from the index.

The query is:

SELECT VehicleId, LastUpdatedUtc, EngineStatus, BatteryHealth

FROM dbo.VehicleHealthSummary

WHERE FleetId = @FleetId

ORDER BY LastUpdatedUtc DESC;

Among the given choices, FleetId is the most important search argument because it appears in the WHERE predicate. Microsoft’s index design guidance recommends putting columns used for searching in the key and using nonkey included columns to cover the rest of the query efficiently.

Why the other options are weaker:

A is not appropriate because changing the clustered index to LastUpdatedUtc would not target the main filter predicate on FleetId, and a table can have only one clustered index.

C makes LastUpdatedUtc the key, which is poor for a query whose primary filter is FleetId.

D is not the right answer here because the query requirement does not specify only recent rows, and filtered indexes are meant for a well-defined subset; this option also uses a time-based expression that is not aligned to the stated query pattern.

Strictly speaking, the most optimal design for both filtering and ordering would usually be a composite key like (FleetId, LastUpdatedUtc), but since that is not one of the available options, B is the correct exam answer.

The correct mapping is:

FOR JSON PATH

JSON_VALUE

JSON_QUERY

To serialize the retrieved rows from knowledge_base , the correct command is FOR JSON PATH . Microsoft documents that FOR JSON formats query results as JSON, and PATH mode is the standard way to shape relational rows into JSON for downstream application or AI use.

To extract the answer field from the response , the correct command is JSON_VALUE because answer is a single scalar field . Microsoft states that JSON_VALUE is used to extract a scalar value from JSON text.

To extract the embeddings to store in query_cache , the correct command is JSON_QUERY because embeddings are returned as a JSON array , not a scalar. Microsoft states that JSON_QUERY extracts an object or array from JSON text, which is exactly the right behavior for an embeddings payload.

The unused options are not the best fit here:

OPENJSON is mainly for shredding JSON into rows and columns.

AI_GENERATE_CHUNKS is for chunking text, not extracting fields from a response payload.

VECTOR_DISTANCE computes similarity between vectors and is unrelated to JSON extraction.

FOR XML PATH produces XML, not JSON.

The correct answer is B . Microsoft’s SSMS Copilot documentation states that queries from Copilot in SSMS are executed under the context of the user’s login and permissions , and that there are no separate permissions for Copilot in SSMS . That means Copilot-run Transact-SQL cannot access more data than the developer’s own database principal is already allowed to access.

That is why the other options are incorrect:

A is wrong because Copilot does not use a separate read-only sandbox in place of database permissions.

C is wrong because enforcement is not a client-side filtering trick; it is enforced by the database security context of the current login.

D is wrong because Copilot does not apply a different RLS model from the developer; it simply runs under the same login context.

So the security boundary is the developer’s existing database identity and permissions .

The requirement is very specific: prevent ddl_Audit from firing during the next deployment , but leave the trigger object in place . Microsoft documents DISABLE TRIGGER as the statement used to disable a trigger without dropping it. That is exactly the right operation for a temporary suspension of a DDL trigger. For a database-scoped DDL trigger, the syntax is on the database scope, for example DISABLE TRIGGER ddl_Audit ON DATABASE;.

The other options do not meet the requirement as directly:

ALTER TRIGGER changes the trigger definition, not simply disables execution.

ALTER DATABASE is not the direct statement for disabling a specific DDL trigger.

ALTER SERVER AUDIT SPECIFICATION and ALTER DATABASE AUDIT SPECIFICATION are audit-feature statements, not trigger-control statements.

So the correct Transact-SQL statement is DISABLE TRIGGER .

The two correct actions are D and E because the ingestion failures are caused by malformed JSON and duplicate payloads , and these two controls address those two problems directly. Microsoft’s JSON documentation states that SQL Server and Azure SQL support validating JSON with ISJSON , and Microsoft specifically recommends using a CHECK constraint to ensure JSON text stored in a column is properly formatted.

For the duplicate-payload issue, creating a unique index on a hash of the payload is the appropriate design. Microsoft documents using hashing functions such as HASHBYTES to hash column values, and SQL Server allows a deterministic computed column to be used as a key column in a UNIQUE constraint or unique index . That makes a persisted hash-based computed column plus a unique index a practical and exam-consistent way to reject duplicate payloads efficiently.

The other options do not solve the stated root causes:

Snapshot isolation addresses concurrency behavior, not malformed JSON or duplicate payload detection.

A trigger to rewrite malformed JSON is not the right integrity control and is brittle.

Foreign key constraints enforce referential integrity, not JSON validity or duplicate-payload prevention

The correct column to use for generating embeddings is incidentDescrlption because embeddings are intended to represent the semantic meaning of rich textual content , not simple categorical, numeric, or location-only values. Microsoft’s DP-800 study guide explicitly includes skills such as identifying which columns to include in embeddings , generating embeddings , and implementing semantic vector search for scenarios where users need to find similar records based on meaning rather than exact matches.

In this scenario, analysts report that it is difficult to find similar incidents based on details such as weather, traffic conditions, and location . Those are descriptive context elements that are typically captured in a free-text incident description field. An embedding generated from incidentDescrlption can encode the semantic relationships among these narrative details, making it suitable for similarity search , semantic search , and RAG retrieval . Microsoft documentation on vectors and embeddings explains that embeddings are generated from text data and then stored for vector search to find semantically related items.

The other options are weaker choices:

vehicleLocation is too narrow and usually better handled with geospatial filtering , not embeddings.

incidentType is likely categorical and too low in semantic richness.

SeverityScore is numeric and not appropriate as the primary source for semantic embeddings.

Microsoft also notes that when multiple useful attributes exist, you can either embed each text column separately or concatenate relevant text fields into one textual representation before generating the embedding. But among the options given, the best and most exam-aligned answer is the textual narrative column : incidentDescrlption .

The first statement is No . The requirement says telemetry data must be stored in a partitioned table to provide predictable performance for ingestion and retention operations. However, the shown CREATE TABLE statement does not define a partition function or partition scheme, and the table is created with a regular clustered primary key on TelemetryId. Microsoft’s partitioning guidance states that creating a partitioned table requires a partition function , a partition scheme , and creating the table or index on that partition scheme using a partitioning column. None of that appears in the code, so the table is not partitioned.

The second statement is Yes . The code creates a JSON index named JI_VehicleTelemetry_Location on LocationJson for these specific JSON paths: $.location.latitude, $.location.longitude, and $.location.accuracy. That matches the requirement that those JSON properties must be filterable by using an index seek . Microsoft documents that JSON indexing is used to optimize filtering and sorting on JSON properties, and the index only helps for the properties included in the index definition.

The third statement is No . The JSON index is defined only for latitude, longitude, and accuracy. A query filtering on $.location.heading references a different path that is not included in the index definition, so that query would not use JI_VehicleTelemetry_Location for that predicate. JSON indexes are path-specific; they do not automatically cover unrelated properties in the same JSON document.

where exists 2. where p.PatientID = pr.PatientID Otherwise we filter PatientID twice. Having in the subquery does not work without group by and the date filter does not work without where.