DP-800 Premium File
- 101 Questions & Answers
- Last Update: Nov 12, 2026
A contact import wants to normalize repeated punctuation patterns without hand-written nested REPLACE functions
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Regular-expression replacement handles matching text patterns and should be tested for unintended matches.
Window numbering can select one row per logical partition while a deterministic secondary sort resolves equal timestamps.
JSON membership testing asks whether a value is contained in the target JSON expression rather than extracting one scalar only.
Jaro-Winkler style similarity rewards matching character patterns and helps with transpositions but cannot prove identity.
A knowledge base stores title, body, last-updated timestamp and customer account number
Which SQL design or implementation decision most directly addresses this requirement?
High-entropy IDs and timestamps add noise to natural-language embeddings; structured filters handle them better.
A fixed-dimensional vector column cannot store embeddings of an incompatible dimension without schema or model changes.
CDC captures historical change records from the log, unlike key-only change tracking.
Incremental content tracking saves model calls and avoids rewriting vectors with no semantic change.
An international product catalog must preserve multilingual descriptions during inserts and updates
Which SQL design or implementation decision most directly addresses this requirement?
Unicode-capable character types retain characters outside a single legacy code page and require appropriate length planning.
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.
Persisting an offset or normalized instant helps prevent ambiguity that occurs with unqualified local DATETIME values.
A team embeds confidential notes and stores them in a shared index without tenant constraints
Which SQL design or implementation decision most directly addresses this requirement?
Vector similarity does not enforce authorization; retrieval still needs tenant/ACL filters.
A fixed-dimensional vector column cannot store embeddings of an incompatible dimension without schema or model changes.
Idempotent update/upsert logic prevents duplicate business vectors during retries and parallel workers.
High-entropy IDs and timestamps add noise to natural-language embeddings; structured filters handle them better.
An import accepts national product codes only if they match an established character pattern
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
REGEXP_LIKE evaluates a regex match, including anchors that constrain the whole input rather than just a substring.
REGEXP_COUNT returns the number of matches, unlike a boolean REGEXP_LIKE or substring extraction.
JSON_QUERY returns a JSON fragment such as an array/object while JSON_VALUE returns a scalar.
Window numbering can select one row per logical partition while a deterministic secondary sort resolves equal timestamps.
A frontend exposes SQL entities through REST and relies on clients to hide confidential columns
Which SQL design or implementation decision most directly addresses this requirement?
Endpoint convenience does not replace user authentication and data access enforcement in API and SQL layers.
Deterministic encryption enables equality comparisons for matching plaintexts but reveals equality patterns and is less private than randomized encryption.
Information classification guides which columns require stricter access, masking, encryption and auditing.
Auditing generates event evidence of SQL activity but must be configured for relevant actions and protected storage.
An API calls a stored procedure, but application traces stop before the database operation and root cause is unclear
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Distributed trace correlation helps associate API failures, dependency latency and service operations.
Change Tracking reports which rows changed since a version without storing a full sequence of each column change.
At-least-once delivery and retries require idempotent consumers rather than relying on exactly-once invocation.
DAB reads configuration to expose chosen database objects as endpoints, subject to role and permission controls.
A team wants to publish a read-only Orders endpoint without accidentally exposing internal financial tables
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
DAB entity mapping and permissions limit accessible objects and operations, complementing SQL grants.
Distributed trace correlation helps associate API failures, dependency latency and service operations.
Logic Apps orchestrate heterogeneous connectors and retries more directly than embedding cross-service calls in a SQL trigger.
At-least-once delivery and retries require idempotent consumers rather than relying on exactly-once invocation.
An analytical fact table has millions of rows and dashboards scan and aggregate a few measures
Which SQL design or implementation decision most directly addresses this requirement?
Columnstore compression and batch execution are effective on broad aggregations; they are not universally best for singleton OLTP updates.
The selected range direction determines ownership of values equal to boundaries, which affects pruning and rollover.
System-versioned temporal tables maintain historical row versions so FOR SYSTEM_TIME queries can reconstruct earlier states.
Identity allocation can leave gaps after failures or caching, so it is inappropriate as a legal no-gap counter.
A security team needs audit evidence retained beyond a compromised workload's lifecycle
After the team applies the intended design, which observation would most directly verify that the specific requirement was met?
Separating audit custody from operational administrators reduces the risk of tampering and premature deletion.
RLS predicates must receive authenticated tenant context and connection pooling can retain session state unless managed.
Masking is a presentation control; filtering, permissions, and inference risks remain if users can query too freely.
RLS filter predicates address row visibility while block predicates can stop invalid INSERT/UPDATE operations.
A DAB GraphQL consumer needs to constrain query results to authorized fields and predicates
Which SQL design or implementation decision most directly addresses this requirement?
API filtering reduces unnecessary result transfer but cannot replace server-side authorization.
CES can publish database changes into an event architecture, but supported platform and ordering guarantees must be checked.
CDC records changes from the transaction log for downstream consumption, but latency and retention need management.
GraphQL relationships make defined SQL relations traversable through the API without arbitrary client SQL.
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