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Developing AI-Enabled Database Solutions DP-800 Practice Test 63

Question 620

A schema-bound view must remain valid when base table columns are changed

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

  1. Use an INSTEAD OF trigger only when deliberate view-write translation is required
  2. Use SCHEMABINDING on the appropriate view where stable underlying schema is required
  3. Create a parameterized stored procedure with explicit transaction and error handling
  4. Review ownership chaining and module permissions before exposing a privileged stored procedure

Explanation

Correct Answer

B:

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

Incorrect Answers

A:

INSTEAD OF triggers replace the original DML action and must implement the full intended persistence behavior.

C:

Procedures encapsulate executable database workflows and accept parameters, but caller permissions and atomicity remain design concerns.

D:

Stored procedure execution can reduce direct table grants but still needs review of ownership, dynamic SQL, and execution context.

Question 621

An API has strict latency and cost goals but a developer chooses the largest model automatically

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

  1. A representative evaluation meets minimum accuracy at acceptable p95 latency and cost per request
  2. A no-change test batch makes no model calls and changed rows are refreshed correctly
  3. All approved fixtures conform to the declared JSON schema and invalid outputs are rejected safely
  4. Replaying an embedding job leaves one vector per intended source version

Explanation

Correct Answer

A:

A larger model is not automatically best; task complexity and throughput determine a suitable choice.

Incorrect Answers

B:

Incremental content tracking saves model calls and avoids rewriting vectors with no semantic change.

C:

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

D:

Idempotent update/upsert logic prevents duplicate business vectors during retries and parallel workers.

Question 622

A GitHub Copilot instructions file gives contradictory advice to avoid transactions while the team requires atomic writes

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

  1. Treat retrieved database contents as untrusted data and restrict tools independently of their text
  2. Enable appropriate audit logging of AI tool calls, principal, target and result without storing secrets
  3. Resolve instruction conflicts in reviewed repository guidance and test the output against required policy
  4. Move connection credentials into approved secret management and prefer short-lived identity tokens

Explanation

Correct Answer

C:

Instruction files influence generation but do not guarantee compliance, so contradictions must be removed and checked.

Incorrect Answers

A:

Prompt injection in tool output must not grant new authority or override the application trust boundary.

B:

Traceable AI-assisted operations support accountability while logs require access and retention controls.

D:

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

Question 623

Database audit records are kept in the same writable store as the application administrator's data

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

  1. Replace broad role membership with custom least-privilege grants for the required objects
  2. Apply identity authorization and network access as complementary model endpoint controls
  3. Use Always Encrypted with client-side key handling and protected column encryption metadata
  4. Route auditing to protected centralized storage with access controls and appropriate retention

Explanation

Correct Answer

D:

Separating audit custody from operational administrators reduces the risk of tampering and premature deletion.

Incorrect Answers

A:

Overprivileged built-in roles broaden the blast radius of compromises and accidental statements.

B:

Network restrictions limit reachability while scoped credentials decide who can invoke supported operations.

C:

Always Encrypted keeps sensitive column values inaccessible to parties lacking client-side keys, unlike server-only encryption at rest.

Question 624

An engineer compares text embeddings and observes ranking shifts after changing the distance metric

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. Filter by authorization as early as supported in retrieval and never expose unauthorized candidates
  3. Select a distance metric appropriate to the embedding model and task, then keep it consistent
  4. Use full-text or exact lexical search appropriate for exact tokens and terms

Explanation

Correct Answer

C:

Cosine, Euclidean and dot-product measures are not universally interchangeable unless normalization assumptions hold.

Incorrect Answers

A:

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

B:

Late filtering after global top-K can leak unauthorized results or starve legitimate tenant matches.

D:

Lexical retrieval is suited to exact symbols and keywords, while semantic vectors may miss exact identifiers.

Question 625

A team wants to publish a read-only Orders endpoint without accidentally exposing internal financial tables

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

  1. Use an idempotent upsert keyed by source change identity with a persisted progress checkpoint
  2. Configure explicit DAB entity permissions and operations for the intended SQL objects
  3. Configure DAB searchable fields and appropriate backend indexing
  4. Enable Azure Monitor Application Insights telemetry with correlation identifiers for the request path

Explanation

Correct Answer

B:

DAB entity mapping and permissions limit accessible objects and operations, complementing SQL grants.

Incorrect Answers

A:

At-least-once delivery and retries require idempotent consumers rather than relying on exactly-once invocation.

C:

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

D:

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

Question 626

An AI search API returns vector rows but has no link to their approved source records

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

  1. Evaluate retrieval precision, recall-at-k and relevance against a labeled question corpus
  2. Order distance-based results according to the metric's nearest-neighbor convention
  3. Filter by authorization as early as supported in retrieval and never expose unauthorized candidates
  4. Persist document IDs, chunk offsets and source version metadata with each vector

Explanation

Correct Answer

D:

Provenance identifiers are needed for source citation, authorization and update/delete handling.

Incorrect Answers

A:

Answer-generation quality cannot reveal all retrieval failures; ranking metrics provide direct measurement.

B:

Distance generally ranks closer vectors by smaller distance values, unlike a similarity score that may rank larger first.

C:

Late filtering after global top-K can leak unauthorized results or starve legitimate tenant matches.

Question 627

A developer plans to apply generated DDL directly to a critical production table

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

  1. Compare generated SQL against security predicates and regression tests before merging
  2. Replace raw sensitive values with sanitized schema and sample fixtures before invoking the AI tool
  3. Treat retrieved database contents as untrusted data and restrict tools independently of their text
  4. Run generated SQL through code review, controlled testing and authorized deployment gates

Explanation

Correct Answer

D:

AI suggestions can contain incorrect assumptions or unsafe migrations and are not self-approving change tickets.

Incorrect Answers

A:

AI-generated rewrites can silently alter authorization or semantics even if syntactically valid.

B:

AI-assisted code generation does not waive data classification, retention and exposure restrictions.

C:

Prompt injection in tool output must not grant new authority or override the application trust boundary.

Question 628

A semantic retrieval team wants to fuse result lists without assuming both systems produce comparable raw scores

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

  1. Filter by authorization as early as supported in retrieval and never expose unauthorized candidates
  2. Use reciprocal rank fusion with documented rank constants and deduplication
  3. Use rank-based fusion or calibrated score normalization before merging lexical and vector results
  4. Precompute stable vector normalization or compatible index state where supported

Explanation

Correct Answer

B:

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

Incorrect Answers

A:

Late filtering after global top-K can leak unauthorized results or starve legitimate tenant matches.

C:

Raw keyword and vector scores may have different ranges and meanings, so naive addition can bias results.

D:

Repeated per-query transformation wastes compute when the model and representation are stable.

Question 629

An Azure Function must react to updates in a SQL table without a custom polling service

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

  1. A seeded update invokes the function and replay handling does not duplicate the logical business effect
  2. A KQL investigation retrieves matched endpoint and database events across the required time window
  3. The client visits all expected rows across pages without duplication under the tested conditions
  4. A sample query retrieves the expected nested orders and unauthorized relationships remain unavailable

Explanation

Correct Answer

A:

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

Incorrect Answers

B:

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

C:

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

D:

GraphQL relationships make defined SQL relations traversable through the API without arbitrary client SQL.

Question 630

A legacy table contains an internal reference number that must be encrypted but clients require server-side processing

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

  1. Add an appropriate Row-Level Security block predicate for prohibited writes
  2. Use a suitable SQL column-level encryption mechanism with explicit key lifecycle
  3. Use Always Encrypted with client-side key handling and protected column encryption metadata
  4. Prefer appropriate Microsoft Entra identities and mapped least-privilege database principals

Explanation

Correct Answer

B:

Server-side column encryption is different from Always Encrypted: the engine may decrypt for authorized server operations.

Incorrect Answers

A:

RLS filter predicates address row visibility while block predicates can stop invalid INSERT/UPDATE operations.

C:

Always Encrypted keeps sensitive column values inaccessible to parties lacking client-side keys, unlike server-only encryption at rest.

D:

Centralized identity management reduces shared-secret exposure and improves attribution and revocation.

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

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