DP-800 Premium File
- 101 Questions & Answers
- Last Update: Nov 12, 2026
A support bot must answer current product policy questions using governed SQL-backed knowledge
Which SQL design or implementation decision most directly addresses this requirement?
RAG supplies relevant external context at answer time, reducing dependence on stale model memory but not guaranteeing truth.
External network latency inside a transaction prolongs locks and increases deadlock and timeout exposure.
RAG context can be missing or ambiguous; the model must not fill unsupported gaps with invented facts.
Excess context raises cost, latency and distraction; selective retrieval improves the model's usable evidence.
A regulated database includes personal fields and the team lacks a consistent classification map
Which SQL design or implementation decision most directly addresses this requirement?
Information classification guides which columns require stricter access, masking, encryption and auditing.
Backup encryption protects copies outside the live database, but losing the key can make recovery impossible.
Deterministic encryption enables equality comparisons for matching plaintexts but reveals equality patterns and is less private than randomized encryption.
Identity-based model calls reduce secret sprawl and allow endpoint permissions to be scoped and revoked.
An internal product wants a GraphQL interface over SQL tables with configured entity access
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
DAB reads configuration to expose chosen database objects as endpoints, subject to role and permission controls.
DAB entity mapping and permissions limit accessible objects and operations, complementing SQL grants.
Change Tracking reports which rows changed since a version without storing a full sequence of each column change.
CDC records changes from the transaction log for downstream consumption, but latency and retention need management.
A retrieval service must cite the database source that supported each generated answer
Which SQL design or implementation decision most directly addresses this requirement?
Source metadata supports provenance checks and keeps generated statements linked to authorized records.
Retrieval-augmented prompts must not bypass database access controls through backend service identity.
Data minimization reduces privacy exposure, inference risk and token costs without impairing the specific answer.
External network latency inside a transaction prolongs locks and increases deadlock and timeout exposure.
A workflow needs exact change keys but does not require the before image of each edited row
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Change Tracking identifies changed rows efficiently but does not preserve full change history or unlimited retention.
Embedding quality varies by language and corpus; cross-lingual retrieval must be measured rather than assumed.
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.
A large table changes distribution drastically after a batch load and query plans regress
Which SQL design or implementation decision most directly addresses this requirement?
Statistics provide distribution estimates that influence cardinality and join strategy choices.
Long transactions hold locks and version state, worsening throughput and blocking.
Improving estimates, ordering or indexing can reduce tempdb spills and prevent large grants from crowding other queries.
Performance changes need controlled before-and-after measurement because cache, concurrency and statistics distort comparisons.
A service currently permits orphan detail rows when parent requests fail
Which SQL design or implementation decision most directly addresses this requirement?
Referential constraints ensure stored relationships point to permitted parent keys and avoid orphan records.
Unicode-capable character types retain characters outside a single legacy code page and require appropriate length planning.
Database check predicates reject invalid stored values regardless of which client sent the write.
An indexed computed expression can make frequently queried JSON properties searchable instead of repeatedly parsing and scanning.
A SQL release pipeline runs nightly regardless of whether a validated artifact exists
Which SQL design or implementation decision most directly addresses this requirement?
Decoupling build and deploy improves traceability and avoids publishing unreviewed source.
Data and schema changes must be sequenced so new constraints do not break on preexisting invalid rows.
SDK-style project definitions simplify consistent tooling and package references while preserving project build semantics.
Federated OIDC authentication limits reusable secret material while retaining policy-controlled authorization.
A compliance query must return customers who have any unresolved claims without duplicating customers
Which SQL design or implementation decision most directly addresses this requirement?
Correlated EXISTS performs an existence test and avoids multiplying outer rows for multiple qualifying matches.
A correlated subquery evaluates using the current outer-row key and may be optimized differently from explicit joins.
Recursive CTEs need termination and data-integrity safeguards; a recursion cap is a protective limit, not a substitute for valid hierarchy rules.
JSON_OBJECT produces correctly structured JSON property/value pairs and avoids manual quoting errors.
An Azure platform needs warnings when DAB latency or SQL exceptions exceed agreed thresholds
Which SQL design or implementation decision most directly addresses this requirement?
Actionable alerts require measurable thresholds, destinations and noise controls rather than generic dashboards alone.
At-least-once delivery and retries require idempotent consumers rather than relying on exactly-once invocation.
CDC records changes from the transaction log for downstream consumption, but latency and retention need management.
DAB reads configuration to expose chosen database objects as endpoints, subject to role and permission controls.
Compliance auditors need to ask what customer address was valid at a past point in time
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
System-versioned temporal tables maintain historical row versions so FOR SYSTEM_TIME queries can reconstruct earlier states.
An indexed computed expression can make frequently queried JSON properties searchable instead of repeatedly parsing and scanning.
Persisting an offset or normalized instant helps prevent ambiguity that occurs with unqualified local DATETIME values.
A primary key uniquely identifies each row and provides a reference target; its underlying index strategy is a separate design choice.
Please check your mailbox for a message from support@examlabs.com and follow the directions.