DP-800 Premium File
- 101 Questions & Answers
- Last Update: Nov 12, 2026
A fraud system stores entities and many-to-many relationships that analysts traverse with patterns
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Graph tables represent relationships explicitly and support pattern matching, though ordinary relational joins remain valid for simple cases.
Identity allocation can leave gaps after failures or caching, so it is inappropriate as a legal no-gap counter.
Checking JSON validity before promotion reduces malformed documents but does not replace application-level schema validation.
In-Memory OLTP reduces certain latch and lock bottlenecks but has feature and capacity constraints that require workload testing.
A database integration needs authorization to a deployed model without storing reusable credentials in T-SQL
Which SQL design or implementation decision most directly addresses this requirement?
Identity-based model calls reduce secret sprawl and allow endpoint permissions to be scoped and revoked.
Server-side column encryption is different from Always Encrypted: the engine may decrypt for authorized server operations.
Backup encryption protects copies outside the live database, but losing the key can make recovery impossible.
Overprivileged built-in roles broaden the blast radius of compromises and accidental statements.
A source-controlled SQL model is missing an approved emergency database change
Which SQL design or implementation decision most directly addresses this requirement?
Unmanaged production modifications can be overwritten unless intentionally captured in source control.
A consistent schema artifact should be promoted while environment-specific values are provided securely at deployment.
Automated schema comparisons may propose destructive changes that need explicit approval and migration planning.
Backward-compatible intermediate schema lets mixed app versions operate safely until a later cleanup.
An order dashboard wants the latest purchase per customer without losing other customers
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Window numbering can select one row per logical partition while a deterministic secondary sort resolves equal timestamps.
OPENJSON shreds objects or arrays into rows and typed columns when a schema is supplied.
APPLY evaluates a right-side table expression per outer row and OUTER APPLY retains parents with no matches.
Normalized edit similarity can be easier to compare across lengths than raw edit operations, though thresholds must be tuned.
An audit table must capture which business row values changed after a DML operation
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
DML triggers can observe affected rows for audit work, but should remain set-based and avoid large side effects.
Views can serve as a restricted interface but must be combined with appropriate permissions and row filtering.
INSTEAD OF triggers replace the original DML action and must implement the full intended persistence behavior.
Views centralize a logical query definition without storing an independent copy of rows by default.
An allocation procedure reads a set of free seats and cannot permit a concurrent phantom insert
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Serializable isolation protects range predicates from concurrent changes but may increase blocking and deadlocks.
SQL may abort one deadlock participant; retries can succeed but must not repeat non-idempotent side effects.
Long transactions hold locks and version state, worsening throughput and blocking.
A deadlock is a cycle in lock dependencies, not merely long blocking; SQL chooses a victim transaction.
A team needs low-latency change events from a supported Fabric SQL workload to a consuming service
Which SQL design or implementation decision most directly addresses this requirement?
CES can publish database changes into an event architecture, but supported platform and ordering guarantees must be checked.
SQL trigger bindings react to detected table changes and require correct change tracking and idempotent handler logic.
Logic Apps orchestrate heterogeneous connectors and retries more directly than embedding cross-service calls in a SQL trigger.
API filtering reduces unnecessary result transfer but cannot replace server-side authorization.
A table trigger currently calls a remote model synchronously and increases insert latency
Which SQL design or implementation decision most directly addresses this requirement?
Synchronous network calls in triggers extend transactions and risk blocking; queueing decouples compute.
A fixed-dimensional vector column cannot store embeddings of an incompatible dimension without schema or model changes.
Different embedding models or versions need not share vector space; mixing vectors can destroy distance relevance.
Functions can process detected row changes automatically but require connection, concurrency and retry safeguards.
A deployment detects that live production schema has columns absent from the project model
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Schema drift is divergence between the target and the model; blind publish may remove legitimate hotfixes.
SDK-style project definitions simplify consistent tooling and package references while preserving project build semantics.
A successful compiler build is necessary but not sufficient for quality or secure schema changes.
Unmanaged production modifications can be overwritten unless intentionally captured in source control.
A million-vector interactive search meets relevance goals but exhaustive retrieval exceeds latency budgets
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
ANN reduces work compared with exhaustive distance scanning but may miss some exact nearest vectors.
Distance calculation requires aligned dimensions and semantics, and metric choice affects ordering.
SQL vector storage enforces or expects a known dimension and model compatibility for meaningful distance calculations.
Semantic relevance does not replace mandatory structured filters such as date, category or tenant.
A RAG index has adjacent snippets repeated many times without measurable recall gains
Which SQL design or implementation decision most directly addresses this requirement?
Excess overlap duplicates tokens and vectors; insufficient overlap may split a needed answer across boundaries.
Operational logs can reveal sensitive source text or access tokens if not carefully configured.
Synchronous network calls in triggers extend transactions and risk blocking; queueing decouples compute.
CDC captures historical change records from the log, unlike key-only change tracking.
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