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Microsoft DP-900 Practice Test 14

Question 130

A telemetry producer needs a scalable event ingestion endpoint. Select TWO statements that correctly describe the Azure Event Hubs event ingestion implementation and how it can be verified.

  1. Use Azure Event Hubs for eligible high-throughput event ingestion.
  2. Consumers read partitioned event streams with tracked sequence and retention.
  3. Run SQL CREATE TABLE against an Event Hubs namespace and claim it persists relational sales tables.
  4. Use Azure Stream Analytics job inputs queries and compatible outputs.
  5. Consume supported change data capture events with reconciliation and delete semantics.

Explanation

Correct Answers

A:

Use Azure Event Hubs for eligible high-throughput event ingestion. This is an appropriate action for the Azure Event Hubs event ingestion case. Event Hubs is a streaming ingestion service not a relational analytics database.

B:

Consumers read partitioned event streams with tracked sequence and retention. This is directly observable success evidence for Azure Event Hubs event ingestion.

Incorrect Answers

C:

Run SQL CREATE TABLE against an Event Hubs namespace and claim it persists relational sales tables. This is not a safe or appropriate Azure Event Hubs event ingestion implementation. Expecting Event Hubs alone to run joins and produce Power BI measures is incorrect.

D:

Use Azure Stream Analytics job inputs queries and compatible outputs. This implements Azure Stream Analytics SQL-like streaming instead of the required Azure Event Hubs event ingestion function. Event Hubs is a streaming ingestion service not a relational analytics database.

E:

Consume supported change data capture events with reconciliation and delete semantics. This implements CDC propagation to analytics instead of the required Azure Event Hubs event ingestion function. Event Hubs is a streaming ingestion service not a relational analytics database.

Question 131

Analysts want to see whether advertising spend relates to revenue across stores. After selecting the proper Scatter chart relationship approach, which observation gives the clearest evidence of success?

  1. Events are assigned to nonoverlapping fixed-duration windows.
  2. Downstream modeled state matches source transactions under agreed latency.
  3. Drill-down shows consistent yearly quarterly and monthly slices.
  4. Points reveal clustering and possible outliers without asserting causality.

Explanation

Correct Answer

D:

Points reveal clustering and possible outliers without asserting causality. This is the directly observable result for Scatter chart relationship; scatter charts show relationships between two quantitative variables.

Incorrect Answers

A:

Events are assigned to nonoverlapping fixed-duration windows. This supports Tumbling time windows, not confirmation of Scatter chart relationship. The relevant evidence is that points reveal clustering and possible outliers without asserting causality.

B:

Downstream modeled state matches source transactions under agreed latency. This supports CDC propagation to analytics, not confirmation of Scatter chart relationship. The relevant evidence is that points reveal clustering and possible outliers without asserting causality.

C:

Drill-down shows consistent yearly quarterly and monthly slices. This supports Drill-down hierarchy for time, not confirmation of Scatter chart relationship. The relevant evidence is that points reveal clustering and possible outliers without asserting causality.

Question 132

A scheduled dataset refresh must retry if one source connection times out. Which principle BEST explains the correct Fabric Data Factory pipeline orchestration design decision?

  1. Session windows depend on activity gaps rather than rigid wall-clock buckets.
  2. Orchestration manages data movement and execution dependencies.
  3. Fabric workloads have complementary analytics designs rather than one universal model.
  4. Reports and dashboards have different presentation and interaction roles.

Explanation

Correct Answer

B:

Orchestration manages data movement and execution dependencies. In this case the applicable decision is to use Fabric Data Factory pipelines with ordered activities and retry/error handling.

Incorrect Answers

A:

Session windows depend on activity gaps rather than rigid wall-clock buckets. That concept explains Session windows of event activity; the situation instead concerns Fabric Data Factory pipeline orchestration. Starting every activity simultaneously may publish partial outputs.

C:

Fabric workloads have complementary analytics designs rather than one universal model. That concept explains Lakehouse versus Warehouse selection; the situation instead concerns Fabric Data Factory pipeline orchestration. Starting every activity simultaneously may publish partial outputs.

D:

Reports and dashboards have different presentation and interaction roles. That concept explains Power BI reports dashboards and sharing; the situation instead concerns Fabric Data Factory pipeline orchestration. Starting every activity simultaneously may publish partial outputs.

Question 133

A developer sees SELECT syntax in a Cosmos NoSQL query. After selecting the proper Cosmos DB API for NoSQL versus SQL text approach, which observation gives the clearest evidence of success?

  1. Typical reads use sensible item sizes and updates avoid unnecessary rewriting.
  2. Test objects change tier or expire according to the approved rule.
  3. New entries extend the log without rewriting an unrelated object.
  4. Document queries behave under partition and JSON item semantics.

Explanation

Correct Answer

D:

Document queries behave under partition and JSON item semantics. This is the directly observable result for Cosmos DB API for NoSQL versus SQL text; similar keyword syntax does not make NoSQL document storage a SQL Server database.

Incorrect Answers

A:

Typical reads use sensible item sizes and updates avoid unnecessary rewriting. This supports Cosmos DB document embedded versus referenced data, not confirmation of Cosmos DB API for NoSQL versus SQL text. The relevant evidence is that document queries behave under partition and JSON item semantics.

B:

Test objects change tier or expire according to the approved rule. This supports Blob lifecycle management rules, not confirmation of Cosmos DB API for NoSQL versus SQL text. The relevant evidence is that document queries behave under partition and JSON item semantics.

C:

New entries extend the log without rewriting an unrelated object. This supports Append blob sequential logging, not confirmation of Cosmos DB API for NoSQL versus SQL text. The relevant evidence is that document queries behave under partition and JSON item semantics.

Question 134

A production deployment renames a table used by two services. If the relevant DBA schema migration oversight safeguard is skipped, which failure is MOST directly associated with that omission?

  1. Uncoordinated column removal can break dependent applications.
  2. Building dashboards without ensuring ingestion produces stale insights.
  3. Putting raw binary into text-only analytic columns frustrates content searches and storage.
  4. Choosing only Blob REST storage breaks an application requiring SMB file operations.

Explanation

Correct Answer

A:

Uncoordinated column removal can break dependent applications. Database administrators plan safe structural changes to shared schemas. A suitable check is to validate affected queries before and after controlled migration.

Incorrect Answers

B:

Building dashboards without ensuring ingestion produces stale insights. This failure is associated with Data engineer ingestion pipeline; it is not the primary failure in the stated DBA schema migration oversight scenario. Database administrators plan safe structural changes to shared schemas.

C:

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 DBA schema migration oversight scenario. Database administrators plan safe structural changes to shared schemas.

D:

Choosing only Blob REST storage breaks an application requiring SMB file operations. This failure is associated with Azure Files SMB shared directories; it is not the primary failure in the stated DBA schema migration oversight scenario. Database administrators plan safe structural changes to shared schemas.

Question 135

Dozens of small tenant databases peak at different times. After selecting the proper Azure SQL elastic pool sharing approach, which observation gives the clearest evidence of success?

  1. PostgreSQL clients and queries work while managed service maintenance is planned.
  2. Peak tenants borrow capacity while pool-wide utilization stays manageable.
  3. View queries return intended permitted columns without creating unmanaged duplicates.
  4. Invalid references are rejected and approved relationship changes follow the constraint.

Explanation

Correct Answer

B:

Peak tenants borrow capacity while pool-wide utilization stays manageable. This is the directly observable result for Azure SQL elastic pool sharing; elastic pools support shared resource budgeting for multiple databases.

Incorrect Answers

A:

PostgreSQL clients and queries work while managed service maintenance is planned. This supports Azure Database for PostgreSQL Flexible Server, not confirmation of Azure SQL elastic pool sharing. The relevant evidence is that peak tenants borrow capacity while pool-wide utilization stays manageable.

C:

View queries return intended permitted columns without creating unmanaged duplicates. This supports SQL view virtual query object, not confirmation of Azure SQL elastic pool sharing. The relevant evidence is that peak tenants borrow capacity while pool-wide utilization stays manageable.

D:

Invalid references are rejected and approved relationship changes follow the constraint. This supports Foreign key referential integrity, not confirmation of Azure SQL elastic pool sharing. The relevant evidence is that peak tenants borrow capacity while pool-wide utilization stays manageable.

Question 136

A business asks which role coordinates relational backup integrity and recovery. Which principle BEST explains the correct DBA backup and recovery responsibility design decision?

  1. Orchestration governs execution sequence and retry behavior of data pipelines.
  2. File storage and searchable record databases serve different access patterns.
  3. DBAs manage database reliability security and recoverability within their responsibility boundary.
  4. CDC streams changes from a database log or supported mechanism.

Explanation

Correct Answer

C:

DBAs manage database reliability security and recoverability within their responsibility boundary. In this case the applicable decision is to assign database administration responsibility for backup retention restore testing and database health.

Incorrect Answers

A:

Orchestration governs execution sequence and retry behavior of data pipelines. That concept explains Data engineer orchestration dependencies; the situation instead concerns DBA backup and recovery responsibility. Assuming cloud-managed storage always eliminates backup planning risks unrecoverable mistakes.

B:

File storage and searchable record databases serve different access patterns. That concept explains File store versus database selection; the situation instead concerns DBA backup and recovery responsibility. Assuming cloud-managed storage always eliminates backup planning risks unrecoverable mistakes.

D:

CDC streams changes from a database log or supported mechanism. That concept explains CDC incremental change propagation; the situation instead concerns DBA backup and recovery responsibility. Assuming cloud-managed storage always eliminates backup planning risks unrecoverable mistakes.

Question 137

Finance needs a curated history of sales measures by fiscal month. Which choice BEST meets this requirement?

  1. Separate descriptive measurement from diagnostic analysis of contributing factors.
  2. Choose Azure SQL Database PaaS with appropriate compute and resilience settings.
  3. Rename a transactional database Warehouse and assume its schema becomes dimensional.
  4. Use an analytical warehouse or Fabric Warehouse for governed relational reporting.

Explanation

Correct Answer

D:

A warehouse organizes integrated analytical tables optimized for reporting.

Incorrect Answers

A:

Separate descriptive measurement from diagnostic analysis of contributing factors. That action primarily handles Descriptive versus diagnostic analytics; the given requirement is Analytical warehouse for structured reporting. A warehouse organizes integrated analytical tables optimized for reporting.

B:

Choose Azure SQL Database PaaS with appropriate compute and resilience settings. That action primarily handles Azure SQL Database managed relational app; the given requirement is Analytical warehouse for structured reporting. A warehouse organizes integrated analytical tables optimized for reporting.

C:

Rename a transactional database Warehouse and assume its schema becomes dimensional. It does not implement Analytical warehouse for structured reporting. Treating production checkout row updates as a warehouse's primary workload can hurt analytics design.

Question 138

A student can register for many courses and each course has many students. Which choice BEST meets this requirement?

  1. Model the association with a bridge table holding the two parent keys.
  2. Use INNER JOIN on the intended keys when only matching pairs are required.
  3. Add one foreign key to Students and assume it represents all student-course pairs.
  4. Use an elastic pool to share eligible database resources under configured limits.

Explanation

Correct Answer

A:

Many-to-many relationships are often resolved with a junction table.

Incorrect Answers

B:

Use INNER JOIN on the intended keys when only matching pairs are required. That action primarily handles Inner join row matching; the given requirement is Many to many bridge table. Many-to-many relationships are often resolved with a junction table.

C:

Add one foreign key to Students and assume it represents all student-course pairs. It does not implement Many to many bridge table. Embedding lists of related IDs in one column makes constraints and joins harder.

D:

Use an elastic pool to share eligible database resources under configured limits. That action primarily handles Azure SQL elastic pool sharing; the given requirement is Many to many bridge table. Many-to-many relationships are often resolved with a junction table.

Question 139

An organization wants Fabric analysis over existing governed lake data without duplicating files. If the relevant OneLake shortcut referencing existing data safeguard is skipped, which failure is MOST directly associated with that omission?

  1. Revoking source permissions may break dependent analyses.
  2. Using a warehouse as a replacement for every OLTP payment transaction may be inappropriate.
  3. Fixed tumbling windows can split an active session at arbitrary boundaries.
  4. Failing to archive selected events loses history after retention.

Explanation

Correct Answer

A:

Revoking source permissions may break dependent analyses. Shortcuts reference data locations and do not necessarily copy the bytes. A suitable check is to test source revocation and downstream shortcut availability.

Incorrect Answers

B:

Using a warehouse as a replacement for every OLTP payment transaction may be inappropriate. This failure is associated with Fabric Warehouse relational reporting; it is not the primary failure in the stated OneLake shortcut referencing existing data scenario. Shortcuts reference data locations and do not necessarily copy the bytes.

C:

Fixed tumbling windows can split an active session at arbitrary boundaries. This failure is associated with Session windows of event activity; it is not the primary failure in the stated OneLake shortcut referencing existing data scenario. Shortcuts reference data locations and do not necessarily copy the bytes.

D:

Failing to archive selected events loses history after retention. This failure is associated with Stream retention and historical analytics; it is not the primary failure in the stated OneLake shortcut referencing existing data scenario. Shortcuts reference data locations and do not necessarily copy the bytes.

Question 140

A production deployment renames a table used by two services. After selecting the proper DBA schema migration oversight approach, which observation gives the clearest evidence of success?

  1. The target holds standardized rows with errors quarantined.
  2. Rewritten or indexed queries improve measured response safely.
  3. Both old and new clients work during the agreed transition period.
  4. Reports calculate consistent totals without updating individual orders.

Explanation

Correct Answer

C:

Both old and new clients work during the agreed transition period. This is the directly observable result for DBA schema migration oversight; database administrators plan safe structural changes to shared schemas.

Incorrect Answers

A:

The target holds standardized rows with errors quarantined. This supports ETL data transformation before loading, not confirmation of DBA schema migration oversight. The relevant evidence is that both old and new clients work during the agreed transition period.

B:

Rewritten or indexed queries improve measured response safely. This supports DBA performance tuning and indexing, not confirmation of DBA schema migration oversight. The relevant evidence is that both old and new clients work during the agreed transition period.

D:

Reports calculate consistent totals without updating individual orders. This supports OLAP aggregation over history, not confirmation of DBA schema migration oversight. The relevant evidence is that both old and new clients work during the agreed transition period.

Microsoft Azure Data Fundamentals (DP-900) Practice Tests