DP-800 Premium File
- 101 Questions & Answers
- Last Update: Nov 12, 2026
A model endpoint returns HTTP 429 during load and the SQL integration treats it as a permanent missing answer
Which SQL design or implementation decision most directly addresses this requirement?
Throttling and transient errors require carefully bounded retry; unbounded retries can exhaust database resources.
Fluency is not a reliability metric; RAG performance depends on retrieval, prompt assembly and model behavior.
Structured JSON preserves named fields and reduces ambiguity compared with ad hoc delimited text.
Retrieval-augmented prompts must not bypass database access controls through backend service identity.
A rolling release introduces a renamed field but old and new services run simultaneously
Which SQL design or implementation decision most directly addresses this requirement?
Backward-compatible intermediate schema lets mixed app versions operate safely until a later cleanup.
A successful compiler build is necessary but not sufficient for quality or secure schema changes.
Federated OIDC authentication limits reusable secret material while retaining policy-controlled authorization.
Project references inform build-time symbol resolution and make schema dependencies explicit.
A single SQL project deploys differently to test and production due to undocumented local connection settings
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
A consistent schema artifact should be promoted while environment-specific values are provided securely at deployment.
Data and schema changes must be sequenced so new constraints do not break on preexisting invalid rows.
CI can build frequently while CD must respect protected environments, approvals and test conditions.
SQL Database Projects represent schema as versioned declarative artifacts that can be built and validated.
An application is placed on a resource tier unsuited to sustained concurrent analytical scans
Which SQL design or implementation decision most directly addresses this requirement?
CPU, concurrency and IO constraints drive sizing decisions; indiscriminate upgrades may not solve a poor plan.
DMVs expose current and cumulative SQL diagnostics that help distinguish contention from capacity or query-plan issues.
The optimizer may scan without a suitable search path; index keys should reflect frequently filtered columns.
Statistics provide distribution estimates that influence cardinality and join strategy choices.
A database security audit finds conflicting membership and object permissions
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
A DENY generally overrides an inherited GRANT for an ordinary user; exceptional cases require explicit security review.
Identity-based model calls reduce secret sprawl and allow endpoint permissions to be scoped and revoked.
Object-level permissions enable task-specific capability without broad exposure to every table.
Backup encryption protects copies outside the live database, but losing the key can make recovery impossible.
An Azure SQL vector column receives arrays of different lengths and insert validation is inconsistent
Which SQL design or implementation decision most directly addresses this requirement?
SQL vector storage enforces or expects a known dimension and model compatibility for meaningful distance calculations.
ANN index retrieval can reduce full-scan cost if accuracy requirements permit, while brute-force evaluation remains a reference.
Exhaustive nearest-neighbor comparison checks all eligible vectors and provides a recall reference for ANN.
Late filtering after global top-K can leak unauthorized results or starve legitimate tenant matches.
An application requires write semantics for a non-updatable view without rewriting clients immediately
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
INSTEAD OF triggers replace the original DML action and must implement the full intended persistence behavior.
NOCOUNT suppresses DONEINPROC row-count chatter without changing @@ROWCOUNT semantics.
DML triggers run per statement and inserted/deleted can contain multiple rows; singleton assumptions cause data loss.
Views can serve as a restricted interface but must be combined with appropriate permissions and row filtering.
Two branches change the same table definition and the merged project has conflicting constraints
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Text merges may not produce semantically compatible database designs, requiring explicit conflict resolution.
Postdeployment scripts handle targeted data initialization but must avoid duplicate or destructive repeated effects.
CI can build frequently while CD must respect protected environments, approvals and test conditions.
Data and schema changes must be sequenced so new constraints do not break on preexisting invalid rows.
A finance summary must retain numerical values exactly when an LLM generates narrative prose
Which SQL design or implementation decision most directly addresses this requirement?
LLMs are not authoritative for arithmetic or source-of-truth values; database computations should remain deterministic.
Model output is untrusted data and must not be treated as authorized executable SQL.
RAG supplies relevant external context at answer time, reducing dependence on stale model memory but not guaranteeing truth.
Retrieval-augmented prompts must not bypass database access controls through backend service identity.
A retention process must remove an old time slice without deleting millions of rows individually
Which SQL design or implementation decision most directly addresses this requirement?
Partition elimination can narrow scans and partition switching can simplify retention when indexes align.
In-Memory OLTP reduces certain latch and lock bottlenecks but has feature and capacity constraints that require workload testing.
Unicode-capable character types retain characters outside a single legacy code page and require appropriate length planning.
Uniqueness for non-primary business attributes is enforced separately from the surrogate primary key.
A regulated database stores highly sensitive values that should remain encrypted outside the trusted client boundary
Which SQL design or implementation decision most directly addresses this requirement?
Always Encrypted keeps sensitive column values inaccessible to parties lacking client-side keys, unlike server-only encryption at rest.
Nonproduction environments should not inherit production exposure merely for test convenience.
RLS applies row filters in SQL based on security context, reducing reliance on each client remembering tenant WHERE clauses.
Object-level permissions enable task-specific capability without broad exposure to every table.
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