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Developing AI-Enabled Database Solutions DP-800 Practice Test 7

Question 60

Regulators require tamper-evident evidence of changes to financial records

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

  1. Use ledger-capable tables with digest verification suited to the retention policy
  2. Evaluate a memory-optimized table with the correct durability and index choices
  3. Define a DEFAULT constraint for the column with an appropriate expression
  4. Use a filtered index whose predicate matches the stable selective subset being queried

Explanation

Correct Answer

A:

Ledger adds cryptographic evidence for changes, but access governance and external digest retention remain essential.

Incorrect Answers

B:

In-Memory OLTP reduces certain latch and lock bottlenecks but has feature and capacity constraints that require workload testing.

C:

A default supplies a value when the insert omits the column; it does not override explicit invalid inputs or validate all states.

D:

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

Question 61

A search system changes embedding model version while keeping the same table and index

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

  1. Test writes create ordered-enough consumable events and replay handling meets the downstream contract
  2. A new document completes every approved connector step or produces a traceable retry/failure
  3. Retrieval comparison confirms all indexed vectors were produced by the intended model version
  4. A controlled product edit appears in semantic search within the agreed freshness window

Explanation

Correct Answer

C:

Different embedding models or versions need not share vector space; mixing vectors can destroy distance relevance.

Incorrect Answers

A:

CES integrates supported SQL changes into event consumers; exact guarantees and availability must be checked.

B:

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

D:

Embedding freshness requires detecting source changes and re-embedding only changed meaningful content.

Question 62

An organization must restore sensitive database backups without exposing them to backup operators

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

  1. A data scan detects no real customer identifiers while migration and query tests still pass
  2. A sample inventory maps confidential columns to approved policies and restricted roles
  3. Test GRANT and denied SELECT events appear with identity, time and action at the audit destination
  4. An unauthorized user cannot read the backup contents and a disaster-recovery drill restores with the proper key

Explanation

Correct Answer

D:

Backup encryption protects copies outside the live database, but losing the key can make recovery impossible.

Incorrect Answers

A:

Nonproduction environments should not inherit production exposure merely for test convenience.

B:

Information classification guides which columns require stricter access, masking, encryption and auditing.

C:

Auditing generates event evidence of SQL activity but must be configured for relevant actions and protected storage.

Question 63

A vector-search system returns plausible passages but the true relevant source ranks just outside top-K

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

  1. The indexed query's p95 latency scales acceptably and measured recall stays above the agreed floor
  2. An approved configuration meets both minimum recall and maximum latency budgets
  3. Measured storage and indexing capacity meet the documented volume and growth budget
  4. A benchmark produces reproducible recall-at-k for the chosen retrieval configuration

Explanation

Correct Answer

D:

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

Incorrect Answers

A:

ANN index retrieval can reduce full-scan cost if accuracy requirements permit, while brute-force evaluation remains a reference.

B:

Fast response alone is not sufficient; index parameters shift the speed-quality tradeoff.

C:

Vector column dimension and element representation drive base storage and index footprint, not row count alone.

Question 64

A database contains small static lookup values that must be consistent in dev and production

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

  1. Keep reviewed static/reference data as versioned deployment assets with idempotent update logic
  2. Adopt an appropriate SDK-style SQL Database Project configuration where supported
  3. Move deployment secrets to approved vault or short-lived federation and mask sensitive outputs
  4. Require a defined suite of SQL lint/build/test and review checks on schema pull requests

Explanation

Correct Answer

A:

Reference data needs source control and repeatable seed logic, not manual one-off production inserts.

Incorrect Answers

B:

SDK-style project definitions simplify consistent tooling and package references while preserving project build semantics.

C:

CI/CD credentials are high-value attack targets and should not be stored in repository text.

D:

A successful compiler build is necessary but not sufficient for quality or secure schema changes.

Question 65

An API supports two SQL tables but one must be hidden entirely from clients

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

  1. The role can GET permitted orders but cannot query or mutate unexposed tables
  2. A synthetic request can be followed through API and SQL dependency spans using the same trace context
  3. Representative search requests return expected records within the query budget
  4. The client visits all expected rows across pages without duplication under the tested conditions

Explanation

Correct Answer

A:

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

Incorrect Answers

B:

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

C:

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

D:

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

Question 66

A query must combine top keyword hits with semantic matches and one source appears in both lists

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

  1. Use rank-based fusion or calibrated score normalization before merging lexical and vector results
  2. Deduplicate by stable document/chunk identity while fusing retrieval rankings
  3. Use VECTORPROPERTY with the relevant property to inspect vector metadata
  4. Filter by authorization as early as supported in retrieval and never expose unauthorized candidates

Explanation

Correct Answer

B:

Duplicate candidates require a deliberate aggregation policy to prevent artificial rank inflation.

Incorrect Answers

A:

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

C:

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

D:

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

Question 67

A report needs a transaction-wide stable snapshot despite concurrent writes

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

  1. Use SNAPSHOT isolation when enabled and suited to the consistency and conflict policy
  2. Find blocking session chains and shorten or correctly scope the transaction
  3. Improve predicate selectivity and indexing while keeping write-index overhead in check
  4. Investigate parameter sensitivity with Query Store and use an appropriate plan strategy

Explanation

Correct Answer

A:

Snapshot transactions read a consistent row version as of transaction start without dirty reads, but writes may conflict.

Incorrect Answers

B:

Blocking is caused by incompatible locks; addressing the head blocker is different from killing every waiting request.

C:

Efficient row identification can shorten lock holding; excess indexes can slow writes and require balanced tuning.

D:

A cached plan based on one parameter distribution may be unsuitable for another; forced plans or hints need evidence.

Question 68

A workload needs to execute a restricted predicate over encrypted sensitive values

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

  1. Use Microsoft Entra authentication through a managed identity where the platform supports it
  2. Evaluate secure enclave-enabled confidential computation only where platform and operation support it
  3. Constrain MCP tools to allowlisted operations and privileged actions to explicit human authorization
  4. Classify sensitive fields and align protections with their policy requirements

Explanation

Correct Answer

B:

Secure enclaves can permit certain richer operations over encrypted data within an attested protected boundary.

Incorrect Answers

A:

Managed identity supplies short-lived identity-based credentials without a long-lived application password.

C:

Model-generated tool calls are untrusted and can misuse granted database permissions unless the tool boundary enforces policy.

D:

Information classification guides which columns require stricter access, masking, encryption and auditing.

Question 69

A reporting role requires partial email addresses for troubleshooting without changing underlying records

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

  1. Enable database auditing with the required event groups, destination and retention
  2. Constrain MCP tools to allowlisted operations and privileged actions to explicit human authorization
  3. Configure Dynamic Data Masking for the least-privileged viewing role
  4. Evaluate secure enclave-enabled confidential computation only where platform and operation support it

Explanation

Correct Answer

C:

Dynamic Data Masking changes query presentation for covered low-privilege principals but is not cryptographic encryption.

Incorrect Answers

A:

Auditing generates event evidence of SQL activity but must be configured for relevant actions and protected storage.

B:

Model-generated tool calls are untrusted and can misuse granted database permissions unless the tool boundary enforces policy.

D:

Secure enclaves can permit certain richer operations over encrypted data within an attested protected boundary.

Question 70

A team needs a governed REST API over selected database entities without writing a complete custom service

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

  1. Configure explicit DAB entity permissions and operations for the intended SQL objects
  2. Send relevant diagnostics to Log Analytics with protected retention and access controls
  3. Create a Data API Builder configuration that declares data sources and allowed entities
  4. Enable Azure Monitor Application Insights telemetry with correlation identifiers for the request path

Explanation

Correct Answer

C:

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

Incorrect Answers

A:

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

B:

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

D:

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

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