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
Which SQL design or implementation decision most directly addresses this requirement?
Graph tables represent relationships explicitly and support pattern matching, though ordinary relational joins remain valid for simple cases.
Approximate binary floating-point types cannot represent every decimal currency value exactly; fixed-precision decimal arithmetic avoids that category of rounding error.
Ledger adds cryptographic evidence for changes, but access governance and external digest retention remain essential.
Checking JSON validity before promotion reduces malformed documents but does not replace application-level schema validation.
A global product-help index must find semantically similar phrases across several languages
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Embedding quality varies by language and corpus; cross-lingual retrieval must be measured rather than assumed.
Vector similarity does not enforce authorization; retrieval still needs tenant/ACL filters.
Idempotent update/upsert logic prevents duplicate business vectors during retries and parallel workers.
Embedding freshness requires detecting source changes and re-embedding only changed meaningful content.
A security team assumes an AI model endpoint's network isolation automatically controls callers
Which SQL design or implementation decision most directly addresses this requirement?
Network restrictions limit reachability while scoped credentials decide who can invoke supported operations.
Overprivileged built-in roles broaden the blast radius of compromises and accidental statements.
Managed identity supplies short-lived identity-based credentials without a long-lived application password.
TLS protects data in transit and endpoint verification reduces man-in-the-middle risk.
A document-search service receives images of receipts and plain text invoices but the chosen model accepts only text
Which SQL design or implementation decision most directly addresses this requirement?
A text-only model cannot directly process raw images, while multimodal inputs require tested format, cost and safety handling.
Functions can process detected row changes automatically but require connection, concurrency and retry safeguards.
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.
An analytics portal queries shared invoice data and needs tenant boundaries enforced independent of application filters
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
RLS applies row filters in SQL based on security context, reducing reliance on each client remembering tenant WHERE clauses.
Network restrictions limit reachability while scoped credentials decide who can invoke supported operations.
Information classification guides which columns require stricter access, masking, encryption and auditing.
RLS predicates must receive authenticated tenant context and connection pooling can retain session state unless managed.
A poorly selected update index increases lock duration and write contention on a hot table
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Efficient row identification can shorten lock holding; excess indexes can slow writes and require balanced tuning.
The optimizer may scan without a suitable search path; index keys should reflect frequently filtered columns.
Performance changes need controlled before-and-after measurement because cache, concurrency and statistics distort comparisons.
Blocking is caused by incompatible locks; addressing the head blocker is different from killing every waiting request.
Data owners must prioritize encryption, retention and restricted access for the most sensitive SQL columns
Which SQL design or implementation decision most directly addresses this requirement?
Information classification guides which columns require stricter access, masking, encryption and auditing.
RLS filter predicates address row visibility while block predicates can stop invalid INSERT/UPDATE operations.
Centralized identity management reduces shared-secret exposure and improves attribution and revocation.
Model-generated tool calls are untrusted and can misuse granted database permissions unless the tool boundary enforces policy.
A DACPAC publisher uses a shared administrative password in raw CI logs
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
CI/CD credentials are high-value attack targets and should not be stored in repository text.
Reference data needs source control and repeatable seed logic, not manual one-off production inserts.
Federated OIDC authentication limits reusable secret material while retaining policy-controlled authorization.
Postdeployment scripts handle targeted data initialization but must avoid duplicate or destructive repeated effects.
A SQL workload reports intermittent latency with high wait durations but normal CPU averages
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
DMVs expose current and cumulative SQL diagnostics that help distinguish contention from capacity or query-plan issues.
Statistics provide distribution estimates that influence cardinality and join strategy choices.
Actual plans reveal runtime statistics and costly operators that estimated plans alone may not expose.
Long transactions hold locks and version state, worsening throughput and blocking.
Different analytics teams repeat the same complex joins to define an approved customer segment
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Views centralize a logical query definition without storing an independent copy of rows by default.
T-SQL user-defined functions have side-effect and statement restrictions that differ from stored procedures.
NOCOUNT suppresses DONEINPROC row-count chatter without changing @@ROWCOUNT semantics.
Procedure output parameters convey scalar results in addition to result sets and return status values.
A multitenant application uses one table for several customers and users must see only their tenant rows
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
RLS applies row filters in SQL based on security context, reducing reliance on each client remembering tenant WHERE clauses.
Dynamic Data Masking changes query presentation for covered low-privilege principals but is not cryptographic encryption.
Always Encrypted keeps sensitive column values inaccessible to parties lacking client-side keys, unlike server-only encryption at rest.
Auditing generates event evidence of SQL activity but must be configured for relevant actions and protected storage.
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