Microsoft DP-800 Questions & Answers

Unbounded result sets waste bandwidth and can overload SQL and API memory.

Mapping a view can create a governed projection with narrower permissions than base tables.

DAB generates endpoints from explicit configuration rather than automatically exposing every table.

The execution plan uses the chosen path access strategy and returns matching products. However, that result would not establish the required outcome: a test payload creates the expected number of items with correct types.

A maintenance rehearsal successfully switches a partition with required constraints. However, that result would not establish the required outcome: a test payload creates the expected number of items with correct types.

Orphan inserts fail and approved delete scenarios behave as specified. However, that result would not establish the required outcome: a test payload creates the expected number of items with correct types.

A larger model is not automatically the best fit for cost, speed or multilingual accuracy. The actual technical constraint is that text-only models cannot directly interpret image content without a supporting vision pipeline.

Mixed-language chunks can confuse similarity and citation mapping. The actual technical constraint is that text-only models cannot directly interpret image content without a supporting vision pipeline.

A database model definition binds SQL AI operations to a specific external provider configuration. The actual technical constraint is that text-only models cannot directly interpret image content without a supporting vision pipeline.

Review partitions and tie order when requirements change. The current task instead requires this action: use deterministic tie-breakers in the ORDER BY.

Avoid unbounded expensive patterns and check collation semantics. The current task instead requires this action: use deterministic tie-breakers in the ORDER BY.

Use XACT_STATE appropriately before commit or rollback. The current task instead requires this action: use deterministic tie-breakers in the ORDER BY.

Synchronous trigger work participates in the calling transaction and can increase latency.

Using parameterized stored procedures with scoped execution rights addresses a different database behavior; the relevant distinction is that review recursion configuration and redesign the trigger to avoid uncontrolled self-updates.

Using a stored procedure with an explicit transaction and appropriate TRY/CATCH rollback addresses a different database behavior; the relevant distinction is that review recursion configuration and redesign the trigger to avoid uncontrolled self-updates.

A maintenance rehearsal successfully switches a partition with required constraints. However, that result would not establish the required outcome: plans show elimination for a month-filtered report and totals remain correct.

Orphan inserts fail and approved delete scenarios behave as specified. However, that result would not establish the required outcome: plans show elimination for a month-filtered report and totals remain correct.

An insert omitting the field records an acceptable UTC creation time. However, that result would not establish the required outcome: plans show elimination for a month-filtered report and totals remain correct.

Metadata-based partition switching requires strict schema and partition alignment. The actual technical constraint is that partitioning is most helpful when queries constrain the partition key.

Memory-optimized OLTP can reduce contention but adds feature and durability constraints. The actual technical constraint is that partitioning is most helpful when queries constrain the partition key.

Binary floating-point approximations cannot represent every decimal currency value exactly. The actual technical constraint is that partitioning is most helpful when queries constrain the partition key.

Audit schema role memberships after every release. The current task instead requires this action: verify exports and application caches do not persist unmasked values.

Scope endpoint permissions and monitor request consumption. The current task instead requires this action: verify exports and application caches do not persist unmasked values.

Add rate limiting and request audit trails. The current task instead requires this action: verify exports and application caches do not persist unmasked values.

Finite ranges exhaust and enabling CYCLE without safety checks may repeat identifiers.

This action addresses a different case: An order system accepts duplicate order numbers and downstream reconciliation double-counts orders. For that case, a surrogate primary key alone does not protect a separate business identifier. For this case, it does not directly correct the observed problem; the distinguishing issue is sequence numbers can be consumed even when transactions roll back or cache is lost. The specifically relevant immediate technical action is: Revise the design to tolerate gaps rather than using sequence numbers as legal receipt counters.

Selecting BIGINT after modeling value range, foreign keys and migration effects addresses a different database behavior; the relevant distinction is that revise the design to tolerate gaps rather than using sequence numbers as legal receipt counters.

Authorized and denied endpoint tests match the intended policy. However, that result would not establish the required outcome: automated tests reject negative amounts and accept valid boundary values.

The merged procedure passes both teams' regression tests. However, that result would not establish the required outcome: automated tests reject negative amounts and accept valid boundary values.

An incompatible size reduction is blocked in staging. However, that result would not establish the required outcome: automated tests reject negative amounts and accept valid boundary values.

Parsing nested arrays into typed rows reduces fragile manual string extraction. The actual technical constraint is that JSON storage allows flexible attributes without abandoning structured identity and integrity.

Application-layer validation alone can be bypassed by other writers. The actual technical constraint is that JSON storage allows flexible attributes without abandoning structured identity and integrity.

A default supplies a value on omission, not a guarantee against explicit bad values. The actual technical constraint is that JSON storage allows flexible attributes without abandoning structured identity and integrity.