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Developing AI-Enabled Database Solutions DP-800 Practice Test 38

Question 370

Repeated public catalog reads overload SQL even though the underlying product list rarely changes

After the team applies the intended design, which observation would most directly verify that the specific requirement was met?

  1. Representative search requests return expected records within the query budget
  2. The client visits all expected rows across pages without duplication under the tested conditions
  3. A seeded event completes the approved stages and a transient connector failure follows the defined retry behavior
  4. Repeated catalog requests reduce SQL load and changed items become visible within the accepted staleness limit

Explanation

Correct Answer

D:

Caching reduces repeat database load but introduces staleness and must avoid exposing user-specific sensitive results.

Incorrect Answers

A:

Search capability should use approved fields and query limits rather than exposing arbitrary free-form SQL.

B:

Pagination bounds response size and limits database work per request, while stable ordering is essential.

C:

Logic Apps orchestrate heterogeneous connectors and retries more directly than embedding cross-service calls in a SQL trigger.

Question 371

An employee report must show percentage of team revenue beside every employee row

Which SQL design or implementation decision most directly addresses this requirement?

  1. Use DENSE_RANK OVER the specified ordering criteria
  2. Use SUM or another aggregate OVER PARTITION BY the grouping key
  3. Use JSON_OBJECT to build object properties rather than concatenate unescaped strings
  4. Use JSON_ARRAYAGG with grouping suited to the required output

Explanation

Correct Answer

B:

Window aggregates retain detail rows while computing group-level results, unlike GROUP BY which collapses rows.

Incorrect Answers

A:

DENSE_RANK retains equal ranks for ties while the next distinct value advances by one.

C:

JSON_OBJECT produces correctly structured JSON property/value pairs and avoids manual quoting errors.

D:

JSON_ARRAYAGG aggregates scalar or JSON values into an array, reducing custom string assembly.

Question 372

A Fabric copilot session is given a lakehouse MCP tool that can enumerate more databases than the user needs

Which SQL design or implementation decision most directly addresses this requirement?

  1. Scope connector and MCP permissions to the intended lakehouse or database objects
  2. Create a narrowly scoped read-only identity or role for the assistant's metadata retrieval
  3. Move connection credentials into approved secret management and prefer short-lived identity tokens
  4. Select the approved model option and confirm its organizational data controls before sending prompts

Explanation

Correct Answer

A:

AI-tool access should follow user authorization and workspace boundaries rather than tool availability alone.

Incorrect Answers

B:

Least privilege reduces the impact of prompt injection, mistaken tool calls and credential disclosure.

C:

Secrets in repository configuration can be leaked or copied; managed credentials reduce exposure and support rotation.

D:

Model choice affects capability and governance, and prompts must stay within the approved service boundary.

Question 373

A chatbot returns irrelevant full-document passages because each entire file is embedded as one vector

After the team applies the intended design, which observation would most directly verify that the specific requirement was met?

  1. Questions about individual procedures retrieve the correct small passage with its document citation
  2. All approved fixtures conform to the declared JSON schema and invalid outputs are rejected safely
  3. A new document completes every approved connector step or produces a traceable retry/failure
  4. Cross-tenant test queries cannot surface protected chunks even when semantic similarity is high

Explanation

Correct Answer

A:

Chunk size and overlap trade off retrieval specificity and lost context; arbitrary whole-file chunks are often weak.

Incorrect Answers

B:

Structured-output mode can reduce free-form variability but application-side validation remains required.

C:

Logic Apps coordinates cross-service actions and retries but does not eliminate the need for idempotency.

D:

Vector similarity does not enforce authorization; retrieval still needs tenant/ACL filters.

Question 374

A new API developer proposes running a procedure as though it were a table-valued expression in a JOIN

Which SQL design or implementation decision most directly addresses this requirement?

  1. Constrain trigger logic and recursion behavior to prevent unintended reentry
  2. Use SCHEMABINDING on the appropriate view where stable underlying schema is required
  3. Use a view or table-valued function when a relation must participate in JOIN operations
  4. Expose a least-privilege view and grant it instead of broadly granting underlying tables

Explanation

Correct Answer

C:

Views and TVFs are relational query sources; stored procedures are invoked with EXEC and do not act as arbitrary table expressions.

Incorrect Answers

A:

Uncontrolled trigger nesting can cause excess DML, recursion failures, and transactional contention.

B:

Schema binding prevents incompatible changes to referenced object definitions until the dependency is handled.

D:

Views can serve as a restricted interface but must be combined with appropriate permissions and row filtering.

Question 375

A status dashboard repeatedly filters on an indexed timestamp yet plans show scans

After the team applies the intended design, which observation would most directly verify that the specific requirement was met?

  1. A test switch moves exactly the intended partition after index alignment with consistent row counts
  2. The actual plan no longer performs the expensive key lookup for the representative query
  3. Aggregate queries show reduced scanned bytes and improved batch-mode performance under realistic load
  4. A representative query returns identical results and shows a range seek with fewer reads

Explanation

Correct Answer

D:

Avoiding functions on the indexed search column can let the optimizer use an index seek.

Incorrect Answers

A:

Partition switching has schema and index-alignment prerequisites; an incompatible index can block the metadata operation.

B:

Covering indexes can avoid residual lookups while keeping included attributes out of the search-key ordering.

C:

Columnstore compression and batch execution are effective on broad aggregations; they are not universally best for singleton OLTP updates.

Question 376

A text search indexes every field including private account notes that should be excluded

Which SQL design or implementation decision most directly addresses this requirement?

  1. Combine structured SQL predicates with vector retrieval using the supported filter strategy
  2. Restrict indexed/searchable columns and enforce permissions independently of relevance
  3. Use reciprocal rank fusion with documented rank constants and deduplication
  4. Use VECTORPROPERTY with the relevant property to inspect vector metadata

Explanation

Correct Answer

B:

Index membership can make data discoverable; search permission cannot be inferred from index design.

Incorrect Answers

A:

Semantic relevance does not replace mandatory structured filters such as date, category or tenant.

C:

RRF combines positional rankings and avoids directly adding incompatible score scales.

D:

Vector properties help validate dimensions and related characteristics before comparison or indexing.

Question 377

An employee table has a surrogate primary key but work email must also be unique

Which SQL design or implementation decision most directly addresses this requirement?

  1. Use a filtered index whose predicate matches the stable selective subset being queried
  2. Use BIGINT for the high-volume surrogate identifier and validate all referencing columns
  3. Create a UNIQUE constraint or index on the relevant business key with documented NULL rules
  4. Rewrite the predicate into a sargable range on the original indexed column

Explanation

Correct Answer

C:

Uniqueness for non-primary business attributes is enforced separately from the surrogate primary key.

Incorrect Answers

A:

A predicate-limited index has fewer rows to maintain and can serve a matching selective WHERE clause.

B:

A 64-bit integer provides a much larger identifier range; relationships and clients must accept the chosen type.

D:

Avoiding functions on the indexed search column can let the optimizer use an index seek.

Question 378

A security team needs to query SQL performance logs alongside DAB request telemetry over a month

Which SQL design or implementation decision most directly addresses this requirement?

  1. Configure an Azure Functions SQL trigger binding with appropriate table and connectivity prerequisites
  2. Send relevant diagnostics to Log Analytics with protected retention and access controls
  3. Expose controlled filtering parameters and enforce SQL/role boundaries
  4. Evaluate Change Event Streaming (CES) where the chosen SQL platform supports it

Explanation

Correct Answer

B:

Log Analytics supports queryable cross-resource telemetry and Azure Monitor alerting.

Incorrect Answers

A:

SQL trigger bindings react to detected table changes and require correct change tracking and idempotent handler logic.

C:

API filtering reduces unnecessary result transfer but cannot replace server-side authorization.

D:

CES can publish database changes into an event architecture, but supported platform and ordering guarantees must be checked.

Question 379

An Azure service needs correlated end-to-end request traces for SQL-backed user actions

After the team applies the intended design, which observation would most directly verify that the specific requirement was met?

  1. A synthetic request can be followed through API and SQL dependency spans using the same trace context
  2. The deployed runtime exposes only configured entities and handles expected basic requests
  3. Unauthenticated requests fail where required and test role claims allow only approved queries
  4. A test insert produces the expected event and the subscriber can replay or recover according to its contract

Explanation

Correct Answer

A:

Distributed trace correlation helps associate API failures, dependency latency and service operations.

Incorrect Answers

B:

DAB reads configuration to expose chosen database objects as endpoints, subject to role and permission controls.

C:

Application identity, API entity permissions and SQL authorization must jointly prevent overbroad access.

D:

CES can publish database changes into an event architecture, but supported platform and ordering guarantees must be checked.

Question 380

Incoming webhook payloads sometimes contain malformed JSON and cause downstream failures

Which SQL design or implementation decision most directly addresses this requirement?

  1. Create a UNIQUE constraint or index on the relevant business key with documented NULL rules
  2. Rewrite the predicate into a sargable range on the original indexed column
  3. Use a JSON-capable column and validate its schema and version expectations
  4. Validate the JSON payload at the database boundary with ISJSON and related constraints where supported

Explanation

Correct Answer

D:

Checking JSON validity before promotion reduces malformed documents but does not replace application-level schema validation.

Incorrect Answers

A:

Uniqueness for non-primary business attributes is enforced separately from the surrogate primary key.

B:

Avoiding functions on the indexed search column can let the optimizer use an index seek.

C:

JSON storage supports evolving attributes, but constraints and relational columns should still enforce critical business invariants.

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

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