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Microsoft DP-900 Practice Test 73

Question 720

A global catalog must balance replica freshness against latency. After selecting the proper Cosmos DB consistency choices approach, which observation gives the clearest evidence of success?

  1. Read tests match documented staleness and latency expectations.
  2. Document queries behave under partition and JSON item semantics.
  3. A prior version is available and current version remains identifiable.
  4. All three client patterns work under their expected APIs.

Explanation

Correct Answer

A:

Read tests match documented staleness and latency expectations. This is the directly observable result for Cosmos DB consistency choices; cosmos DB consistency levels trade freshness availability latency and throughput.

Incorrect Answers

B:

Document queries behave under partition and JSON item semantics. This supports Cosmos DB API for NoSQL versus SQL text, not confirmation of Cosmos DB consistency choices. The relevant evidence is that read tests match documented staleness and latency expectations.

C:

A prior version is available and current version remains identifiable. This supports Blob versioning on overwrite, not confirmation of Cosmos DB consistency choices. The relevant evidence is that read tests match documented staleness and latency expectations.

D:

All three client patterns work under their expected APIs. This supports Choosing Blob Files and Table for app needs, not confirmation of Cosmos DB consistency choices. The relevant evidence is that read tests match documented staleness and latency expectations.

Question 721

Fraud investigators need to follow relationships between accounts and devices. After selecting the proper Cosmos DB API for Apache Gremlin graph approach, which observation gives the clearest evidence of success?

  1. Downstream reflects expected eligible changes without repeated full scans.
  2. New and old devices can be read without demanding identical property sets.
  3. Supported clients mount the share and read or write approved paths.
  4. Graph queries follow intended relationship paths and return connected entities.

Explanation

Correct Answer

D:

Graph queries follow intended relationship paths and return connected entities. This is the directly observable result for Cosmos DB API for Apache Gremlin graph; gremlin API models relationships as vertices and edges.

Incorrect Answers

A:

Downstream reflects expected eligible changes without repeated full scans. This supports Cosmos DB change feed updates, not confirmation of Cosmos DB API for Apache Gremlin graph. The relevant evidence is that graph queries follow intended relationship paths and return connected entities.

B:

New and old devices can be read without demanding identical property sets. This supports Table Storage schemaless properties, not confirmation of Cosmos DB API for Apache Gremlin graph. The relevant evidence is that graph queries follow intended relationship paths and return connected entities.

C:

Supported clients mount the share and read or write approved paths. This supports Azure Files SMB application migration, not confirmation of Cosmos DB API for Apache Gremlin graph. The relevant evidence is that graph queries follow intended relationship paths and return connected entities.

Question 722

An analyst can accidentally drop production tables. After selecting the proper DBA least privilege account roles approach, which observation gives the clearest evidence of success?

  1. Nested lookups return the right address and amount without misreading sibling values.
  2. Tests confirm analysts can SELECT approved data but cannot DROP tables.
  3. Rewritten or indexed queries improve measured response safely.
  4. Failure tests and recovery objectives align with documented copy and recovery mechanisms.

Explanation

Correct Answer

B:

Tests confirm analysts can SELECT approved data but cannot DROP tables. This is the directly observable result for DBA least privilege account roles; database access governance is an administrative responsibility.

Incorrect Answers

A:

Nested lookups return the right address and amount without misreading sibling values. This supports JSON arrays and nested objects, not confirmation of DBA least privilege account roles. The relevant evidence is that tests confirm analysts can SELECT approved data but cannot DROP tables.

C:

Rewritten or indexed queries improve measured response safely. This supports DBA performance tuning and indexing, not confirmation of DBA least privilege account roles. The relevant evidence is that tests confirm analysts can SELECT approved data but cannot DROP tables.

D:

Failure tests and recovery objectives align with documented copy and recovery mechanisms. This supports Storage resiliency and replicas, not confirmation of DBA least privilege account roles. The relevant evidence is that tests confirm analysts can SELECT approved data but cannot DROP tables.

Question 723

A photo archive needs image metadata searchable while image bytes remain intact. Which principle BEST explains the correct Unstructured image binary files design decision?

  1. CDC streams changes from a database log or supported mechanism.
  2. Unstructured images lack a predefined row-column model even when their metadata is structured.
  3. Identifier digits are not necessarily numbers with arithmetic meaning.
  4. Database operations require health monitoring and capacity planning.

Explanation

Correct Answer

B:

Unstructured images lack a predefined row-column model even when their metadata is structured. In this case the applicable decision is to store binary images as objects and maintain searchable metadata separately.

Incorrect Answers

A:

CDC streams changes from a database log or supported mechanism. That concept explains CDC incremental change propagation; the situation instead concerns Unstructured image binary files. Putting raw binary into text-only analytic columns frustrates content searches and storage.

C:

Identifier digits are not necessarily numbers with arithmetic meaning. That concept explains Data types in tabular files; the situation instead concerns Unstructured image binary files. Putting raw binary into text-only analytic columns frustrates content searches and storage.

D:

Database operations require health monitoring and capacity planning. That concept explains DBA monitoring capacity and alerts; the situation instead concerns Unstructured image binary files. Putting raw binary into text-only analytic columns frustrates content searches and storage.

Question 724

A sensor goes inactive and later resumes after a long gap. Which principle BEST explains the correct Session windows of event activity design decision?

  1. CDC propagates database changes without resnapshotting every row.
  2. Activator turns detected data conditions into governed actions.
  3. Medallion layers make data refinement and reuse explicit.
  4. Session windows depend on activity gaps rather than rigid wall-clock buckets.

Explanation

Correct Answer

D:

Session windows depend on activity gaps rather than rigid wall-clock buckets. In this case the applicable decision is to use inactivity-based session windows to group related event sequences.

Incorrect Answers

A:

CDC propagates database changes without resnapshotting every row. That concept explains CDC propagation to analytics; the situation instead concerns Session windows of event activity. Fixed tumbling windows can split an active session at arbitrary boundaries.

B:

Activator turns detected data conditions into governed actions. That concept explains Fabric Activator rule-triggered action; the situation instead concerns Session windows of event activity. Fixed tumbling windows can split an active session at arbitrary boundaries.

C:

Medallion layers make data refinement and reuse explicit. That concept explains Bronze silver gold medallion design; the situation instead concerns Session windows of event activity. Fixed tumbling windows can split an active session at arbitrary boundaries.

Question 725

A team repeatedly reads a narrow subset of fields from a wide historical dataset. What is the MOST appropriate next validation or correction?

  1. Test SQL queries transaction rollback and service configuration.
  2. Open Parquet bytes as UTF-8 lines and assert that one newline equals one record.
  3. Compare read volumes and schema across Parquet and delimited exports.
  4. Test representative queries and changes across candidate data shapes.

Explanation

Correct Answer

C:

Compare read volumes and schema across Parquet and delimited exports. This tests the intended result: queries read relevant columns efficiently while preserving typed values.

Incorrect Answers

A:

Test SQL queries transaction rollback and service configuration. It tests Azure SQL Database managed relational app rather than the critical Parquet columnar analytical file behavior. Columnar formats can reduce I/O for analytical scans over selected fields.

B:

Open Parquet bytes as UTF-8 lines and assert that one newline equals one record. This unsafe shortcut leaves the Parquet columnar analytical file problem unresolved. Assuming Parquet is human-readable CSV leads to invalid parser behavior.

D:

Test representative queries and changes across candidate data shapes. It tests Relational rows versus document attributes rather than the critical Parquet columnar analytical file behavior. Columnar formats can reduce I/O for analytical scans over selected fields.

Question 726

A sales team needs clear measures and interactive product filters. If the relevant Data analyst report design safeguard is skipped, which failure is MOST directly associated with that omission?

  1. Uncoordinated column removal can break dependent applications.
  2. Choosing a misleading graphic can hide a real business pattern.
  3. Treating a high-rate stream as an hourly CSV export delays detection.
  4. Treating all naive timestamps as UTC can shift historical events.

Explanation

Correct Answer

B:

Choosing a misleading graphic can hide a real business pattern. Analysts translate curated data into interpretable insights. A suitable check is to test dashboard comprehension using business questions.

Incorrect Answers

A:

Uncoordinated column removal can break dependent applications. This failure is associated with DBA schema migration oversight; it is not the primary failure in the stated Data analyst report design scenario. Analysts translate curated data into interpretable insights.

C:

Treating a high-rate stream as an hourly CSV export delays detection. This failure is associated with Event streaming continual processing; it is not the primary failure in the stated Data analyst report design scenario. Analysts translate curated data into interpretable insights.

D:

Treating all naive timestamps as UTC can shift historical events. This failure is associated with Timestamp and timezone representation; it is not the primary failure in the stated Data analyst report design scenario. Analysts translate curated data into interpretable insights.

Question 727

Sales facts contain one row per order line and customers change region. Which choice BEST meets this requirement?

  1. Publish a governed semantic model with shared dimensions and measures.
  2. Define fact grain and descriptive dimension keys before analytical modelling.
  3. Use a line chart with a continuous or properly sorted time axis.
  4. Join every fact to every possible dimension row and call the total accurate.

Explanation

Correct Answer

B:

Facts record events/measures while dimensions describe entities and context.

Incorrect Answers

A:

Publish a governed semantic model with shared dimensions and measures. That action primarily handles Semantic model over curated analytics; the given requirement is Analytical fact and dimension grain. Facts record events/measures while dimensions describe entities and context.

C:

Use a line chart with a continuous or properly sorted time axis. That action primarily handles Line chart time-series selection; the given requirement is Analytical fact and dimension grain. Facts record events/measures while dimensions describe entities and context.

D:

Join every fact to every possible dimension row and call the total accurate. It does not implement Analytical fact and dimension grain. Duplicated dimension matches can inflate sums.

Question 728

A company needs to move source data from SQL to cloud storage. After selecting the proper Azure Data Factory Copy Activity approach, which observation gives the clearest evidence of success?

  1. Every eligible change since prior success appears exactly as required downstream.
  2. Aggregations reflect intended occurrence windows despite bounded delays.
  3. A single event can contribute to overlapping eligible windows.
  4. Records arrive at destination with auditable activity outcomes.

Explanation

Correct Answer

D:

Records arrive at destination with auditable activity outcomes. This is the directly observable result for Azure Data Factory Copy Activity; data Factory orchestrates integration and movement rather than being a traditional OLTP engine.

Incorrect Answers

A:

Every eligible change since prior success appears exactly as required downstream. This supports Incremental ingestion with watermark, not confirmation of Azure Data Factory Copy Activity. The relevant evidence is that records arrive at destination with auditable activity outcomes.

B:

Aggregations reflect intended occurrence windows despite bounded delays. This supports Event time versus processing time, not confirmation of Azure Data Factory Copy Activity. The relevant evidence is that records arrive at destination with auditable activity outcomes.

C:

A single event can contribute to overlapping eligible windows. This supports Hopping sliding analytic windows, not confirmation of Azure Data Factory Copy Activity. The relevant evidence is that records arrive at destination with auditable activity outcomes.

Question 729

A distributor knows forecast demand and must decide depot allocations. If the relevant Prescriptive decision optimization safeguard is skipped, which failure is MOST directly associated with that omission?

  1. Choosing a misleading graphic can hide a real business pattern.
  2. An unconstrained optimizer may propose impossible schedules.
  3. Full table copies without deduplication may overwrite newer analytics state.
  4. Putting raw binary into text-only analytic columns frustrates content searches and storage.

Explanation

Correct Answer

B:

An unconstrained optimizer may propose impossible schedules. Prescriptive analytics recommends actions rather than simply predicting values. A suitable check is to recompute recommended actions under different capacity scenarios.

Incorrect Answers

A:

Choosing a misleading graphic can hide a real business pattern. This failure is associated with Data analyst report design; it is not the primary failure in the stated Prescriptive decision optimization scenario. Prescriptive analytics recommends actions rather than simply predicting values.

C:

Full table copies without deduplication may overwrite newer analytics state. This failure is associated with CDC incremental change propagation; it is not the primary failure in the stated Prescriptive decision optimization scenario. Prescriptive analytics recommends actions rather than simply predicting values.

D:

Putting raw binary into text-only analytic columns frustrates content searches and storage. This failure is associated with Unstructured image binary files; it is not the primary failure in the stated Prescriptive decision optimization scenario. Prescriptive analytics recommends actions rather than simply predicting values.

Question 730

An engineer asks who validates backward-compatible schema rollout and rollback. Select TWO statements that correctly describe the DBA schema migration oversight implementation and how it can be verified.

  1. Rename a table directly in production without checking callers.
  2. Choose suitable storage redundancy and separate restore or backup strategy where needed.
  3. Monitor database capacity connections health and alerts with response procedures.
  4. Both old and new clients work during the agreed transition period.
  5. Coordinate database schema changes with migrations backups and dependency testing.

Explanation

Correct Answers

D:

Both old and new clients work during the agreed transition period. This is directly observable success evidence for DBA schema migration oversight.

E:

Coordinate database schema changes with migrations backups and dependency testing. This is an appropriate action for the DBA schema migration oversight case. Database administrators plan safe structural changes to shared schemas.

Incorrect Answers

A:

Rename a table directly in production without checking callers. This is not a safe or appropriate DBA schema migration oversight implementation. Uncoordinated column removal can break dependent applications.

B:

Choose suitable storage redundancy and separate restore or backup strategy where needed. This implements Storage resiliency and replicas instead of the required DBA schema migration oversight function. Database administrators plan safe structural changes to shared schemas.

C:

Monitor database capacity connections health and alerts with response procedures. This implements DBA monitoring capacity and alerts instead of the required DBA schema migration oversight function. Database administrators plan safe structural changes to shared schemas.

Microsoft Azure Data Fundamentals (DP-900) Practice Tests