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Microsoft DP-900 Practice Test 66

Question 650

A company plans moving a local SQL Server database to Azure SQL. After selecting the proper Data migration SQL Server assessment approach, which observation gives the clearest evidence of success?

  1. Each permitted pair is represented once and joins list associations.
  2. Table definitions change while intended existing business rows remain recoverable.
  3. The target is selected and known incompatibilities are addressed before cutover.
  4. Database service updates are managed while customer-owned logic is tested.

Explanation

Correct Answer

C:

The target is selected and known incompatibilities are addressed before cutover. This is the directly observable result for Data migration SQL Server assessment; moving relational data requires compatibility assessment beyond copying data pages.

Incorrect Answers

A:

Each permitted pair is represented once and joins list associations. This supports Many to many bridge table, not confirmation of Data migration SQL Server assessment. The relevant evidence is that the target is selected and known incompatibilities are addressed before cutover.

B:

Table definitions change while intended existing business rows remain recoverable. This supports CREATE ALTER DROP DDL, not confirmation of Data migration SQL Server assessment. The relevant evidence is that the target is selected and known incompatibilities are addressed before cutover.

D:

Database service updates are managed while customer-owned logic is tested. This supports Azure SQL managed maintenance responsibility, not confirmation of Data migration SQL Server assessment. The relevant evidence is that the target is selected and known incompatibilities are addressed before cutover.

Question 651

Analysts retrieve only Region and Revenue from a wide history dataset. Which choice BEST meets this requirement?

  1. Assume Parquet automatically becomes a normalized OLTP database.
  2. Configure an eligible OneLake shortcut and access to its target.
  3. Choose Azure IoT Hub for supported device-oriented connectivity and management.
  4. Store appropriate analytical data in Parquet columnar files.

Explanation

Correct Answer

D:

Store appropriate analytical data in Parquet columnar files. Columnar storage can improve compression and projection-oriented analytics. In the stated case, verification should show that queries scan fewer selected columns while data types remain valid.

Incorrect Answers

A:

Assume Parquet automatically becomes a normalized OLTP database. It does not implement Parquet compressed columnar analytics. Reading Parquet using a line-by-line CSV parser causes errors.

B:

Configure an eligible OneLake shortcut and access to its target. That action primarily handles OneLake shortcut referencing existing data; the given requirement is Parquet compressed columnar analytics. Columnar storage can improve compression and projection-oriented analytics.

C:

Choose Azure IoT Hub for supported device-oriented connectivity and management. That action primarily handles Azure IoT Hub device messaging; the given requirement is Parquet compressed columnar analytics. Columnar storage can improve compression and projection-oriented analytics.

Question 652

A multiplayer game stores each player's flexible profile document. After selecting the proper Cosmos DB NoSQL JSON document container approach, which observation gives the clearest evidence of success?

  1. Early deletion is denied and authorized hold release follows governance.
  2. Document reads and writes return expected JSON properties at scale.
  3. Billing and throttling behavior match measured usage and service limits.
  4. All three client patterns work under their expected APIs.

Explanation

Correct Answer

B:

Document reads and writes return expected JSON properties at scale. This is the directly observable result for Cosmos DB NoSQL JSON document container; the NoSQL API stores JSON items without requiring identical SQL rows.

Incorrect Answers

A:

Early deletion is denied and authorized hold release follows governance. This supports Immutable blob retention and legal hold, not confirmation of Cosmos DB NoSQL JSON document container. The relevant evidence is that document reads and writes return expected JSON properties at scale.

C:

Billing and throttling behavior match measured usage and service limits. This supports Cosmos DB serverless versus provisioned throughput, not confirmation of Cosmos DB NoSQL JSON document container. The relevant evidence is that document reads and writes return expected JSON properties at scale.

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 NoSQL JSON document container. The relevant evidence is that document reads and writes return expected JSON properties at scale.

Question 653

A lakehouse can ingest raw transactions and use SQL engines to clean them. After selecting the proper ELT warehouse pushdown transforms approach, which observation gives the clearest evidence of success?

  1. Images remain retrievable while SQL reports query approved modeled facts.
  2. Imported tables and approved relationships support intended reports.
  3. Events are assigned to nonoverlapping fixed-duration windows.
  4. Curated tables can be rebuilt from retained raw inputs.

Explanation

Correct Answer

D:

Curated tables can be rebuilt from retained raw inputs. This is the directly observable result for ELT warehouse pushdown transforms; eLT loads before transformation and uses destination processing resources.

Incorrect Answers

A:

Images remain retrievable while SQL reports query approved modeled facts. This supports Structured warehouse and unstructured lake coexistence, not confirmation of ELT warehouse pushdown transforms. The relevant evidence is that curated tables can be rebuilt from retained raw inputs.

B:

Imported tables and approved relationships support intended reports. This supports Power BI Desktop data import, not confirmation of ELT warehouse pushdown transforms. The relevant evidence is that curated tables can be rebuilt from retained raw inputs.

C:

Events are assigned to nonoverlapping fixed-duration windows. This supports Tumbling time windows, not confirmation of ELT warehouse pushdown transforms. The relevant evidence is that curated tables can be rebuilt from retained raw inputs.

Question 654

Business analysts repeatedly query totals across years and departments. Select TWO statements that correctly describe the Analytical warehouse for structured reporting implementation and how it can be verified.

  1. Use a suitable indexed search capability for text retrieval and a document store for durable records.
  2. Rename a transactional database Warehouse and assume its schema becomes dimensional.
  3. Keep related short business writes in an atomic transaction.
  4. Use an analytical warehouse or Fabric Warehouse for governed relational reporting.
  5. Aggregates respond efficiently while historical definitions remain consistent.

Explanation

Correct Answers

D:

Use an analytical warehouse or Fabric Warehouse for governed relational reporting. This is an appropriate action for the Analytical warehouse for structured reporting case. A warehouse organizes integrated analytical tables optimized for reporting.

E:

Aggregates respond efficiently while historical definitions remain consistent. This is directly observable success evidence for Analytical warehouse for structured reporting.

Incorrect Answers

A:

Use a suitable indexed search capability for text retrieval and a document store for durable records. This implements Document indexing versus full-text search instead of the required Analytical warehouse for structured reporting function. A warehouse organizes integrated analytical tables optimized for reporting.

B:

Rename a transactional database Warehouse and assume its schema becomes dimensional. This is not a safe or appropriate Analytical warehouse for structured reporting implementation. Treating production checkout row updates as a warehouse's primary workload can hurt analytics design.

C:

Keep related short business writes in an atomic transaction. This implements OLTP atomic purchase transaction instead of the required Analytical warehouse for structured reporting function. A warehouse organizes integrated analytical tables optimized for reporting.

Question 655

A warehouse must receive order updates without rescanning full OLTP tables. If the relevant CDC incremental change propagation safeguard is skipped, which failure is MOST directly associated with that omission?

  1. Running massive unbounded analytics queries on a critical transactional database may hurt performance.
  2. Ignoring resource trends can cause preventable unavailability.
  3. Full table copies without deduplication may overwrite newer analytics state.
  4. Running transformations only in a dashboard can leave incompatible raw measurements.

Explanation

Correct Answer

C:

Full table copies without deduplication may overwrite newer analytics state. CDC streams changes from a database log or supported mechanism. A suitable check is to reconcile source changes and downstream checkpoints through a test.

Incorrect Answers

A:

Running massive unbounded analytics queries on a critical transactional database may hurt performance. This failure is associated with OLTP relational versus OLAP analytical store; it is not the primary failure in the stated CDC incremental change propagation scenario. CDC streams changes from a database log or supported mechanism.

B:

Ignoring resource trends can cause preventable unavailability. This failure is associated with DBA monitoring capacity and alerts; it is not the primary failure in the stated CDC incremental change propagation scenario. CDC streams changes from a database log or supported mechanism.

D:

Running transformations only in a dashboard can leave incompatible raw measurements. This failure is associated with ELT load then transform in engine; it is not the primary failure in the stated CDC incremental change propagation scenario. CDC streams changes from a database log or supported mechanism.

Question 656

A warehouse needs to reflect inserts and updates from an operational database. After selecting the proper CDC propagation to analytics approach, which observation gives the clearest evidence of success?

  1. Downstream modeled state matches source transactions under agreed latency.
  2. Output has standardized columns and repeatable refresh behavior.
  3. Separate bursts form distinct sessions after gaps exceed policy.
  4. Fraud alerts arrive promptly while daily reports complete within their SLA.

Explanation

Correct Answer

A:

Downstream modeled state matches source transactions under agreed latency. This is the directly observable result for CDC propagation to analytics; cDC propagates database changes without resnapshotting every row.

Incorrect Answers

B:

Output has standardized columns and repeatable refresh behavior. This supports Fabric Dataflow Gen2 transformations, not confirmation of CDC propagation to analytics. The relevant evidence is that downstream modeled state matches source transactions under agreed latency.

C:

Separate bursts form distinct sessions after gaps exceed policy. This supports Session windows of event activity, not confirmation of CDC propagation to analytics. The relevant evidence is that downstream modeled state matches source transactions under agreed latency.

D:

Fraud alerts arrive promptly while daily reports complete within their SLA. This supports Streaming versus batch latency choice, not confirmation of CDC propagation to analytics. The relevant evidence is that downstream modeled state matches source transactions under agreed latency.

Question 657

A legacy workload updates fixed byte ranges rather than replacing an entire file. Select TWO statements that correctly describe the Page blob random access implementation and how it can be verified.

  1. Expected ranges update while other pages remain unchanged.
  2. Use supported page blob semantics for aligned random-access data.
  3. Issue a limited SAS or supported delegated access scoped by operation resource and expiry.
  4. Select an appropriate supported consistency level for business requirements.
  5. Assume a page blob is an ordinary sequential append log.

Explanation

Correct Answers

A:

Expected ranges update while other pages remain unchanged. This is directly observable success evidence for Page blob random access.

B:

Use supported page blob semantics for aligned random-access data. This is an appropriate action for the Page blob random access case. Page blobs are suited to random I/O scenarios and VHD backing.

Incorrect Answers

C:

Issue a limited SAS or supported delegated access scoped by operation resource and expiry. This implements Blob SAS delegated access instead of the required Page blob random access function. Page blobs are suited to random I/O scenarios and VHD backing.

D:

Select an appropriate supported consistency level for business requirements. This implements Cosmos DB consistency choices instead of the required Page blob random access function. Page blobs are suited to random I/O scenarios and VHD backing.

E:

Assume a page blob is an ordinary sequential append log. This is not a safe or appropriate Page blob random access implementation. Using append-only semantics for virtual disk page updates is inappropriate.

Question 658

A manufacturer needs to collect equipment measurements from several incompatible source systems. What is the MOST appropriate next validation or correction?

  1. Validate source connection types and loaded sample values.
  2. Validate file paths lineage and SQL measure reconciliation.
  3. Create a Power BI chart and assume it automatically imports every source system.
  4. Reconcile each source export with landed records and failure logs.

Explanation

Correct Answer

D:

Reconcile each source export with landed records and failure logs. This tests the intended result: source records arrive with tracked counts and errors for each system.

Incorrect Answers

A:

Validate source connection types and loaded sample values. It tests Power BI Desktop data import rather than the critical Analytical ingestion from operational systems behavior. Analytical ingestion moves and organizes data from operational sources for subsequent processing.

B:

Validate file paths lineage and SQL measure reconciliation. It tests Structured warehouse and unstructured lake coexistence rather than the critical Analytical ingestion from operational systems behavior. Analytical ingestion moves and organizes data from operational sources for subsequent processing.

C:

Create a Power BI chart and assume it automatically imports every source system. This unsafe shortcut leaves the Analytical ingestion from operational systems problem unresolved. Missing ingestion error handling can silently omit entire business units.

Question 659

A company needs to move source data from SQL to cloud storage. If the relevant Azure Data Factory Copy Activity safeguard is skipped, which failure is MOST directly associated with that omission?

  1. Loading unvalidated data corrupts downstream measures.
  2. Correlation in points alone does not prove one variable caused the other.
  3. Confusing stream discovery with a durable historical table leaves retention unspecified.
  4. Mistaking Copy Activity for an always-on SQL database can misdesign access.

Explanation

Correct Answer

D:

Mistaking Copy Activity for an always-on SQL database can misdesign access. Data Factory orchestrates integration and movement rather than being a traditional OLTP engine. A suitable check is to reconcile moved byte counts and source query rows.

Incorrect Answers

A:

Loading unvalidated data corrupts downstream measures. This failure is associated with Batch ETL staging and cleansing; it is not the primary failure in the stated Azure Data Factory Copy Activity scenario. Data Factory orchestrates integration and movement rather than being a traditional OLTP engine.

B:

Correlation in points alone does not prove one variable caused the other. This failure is associated with Scatter chart relationship; it is not the primary failure in the stated Azure Data Factory Copy Activity scenario. Data Factory orchestrates integration and movement rather than being a traditional OLTP engine.

C:

Confusing stream discovery with a durable historical table leaves retention unspecified. This failure is associated with Fabric Real-Time hub stream discovery; it is not the primary failure in the stated Azure Data Factory Copy Activity scenario. Data Factory orchestrates integration and movement rather than being a traditional OLTP engine.

Question 660

A retailer needs every customer row to have a predictable CustomerID and email column. After selecting the proper Structured records in a customer table approach, which observation gives the clearest evidence of success?

  1. Both old and new clients work during the agreed transition period.
  2. Valid records fit the specified columns while malformed field types are caught.
  3. Source data arrives in correct destinations with logged errors and retries.
  4. Sample accents and amounts survive round-trip without becoming different values.

Explanation

Correct Answer

B:

Valid records fit the specified columns while malformed field types are caught. This is the directly observable result for Structured records in a customer table; structured data follows an explicit schema that makes consistent queries and validation practical.

Incorrect Answers

A:

Both old and new clients work during the agreed transition period. This supports DBA schema migration oversight, not confirmation of Structured records in a customer table. The relevant evidence is that valid records fit the specified columns while malformed field types are caught.

C:

Source data arrives in correct destinations with logged errors and retries. This supports Data engineer ingestion pipeline, not confirmation of Structured records in a customer table. The relevant evidence is that valid records fit the specified columns while malformed field types are caught.

D:

Sample accents and amounts survive round-trip without becoming different values. This supports Text encoding and numeric parsing, not confirmation of Structured records in a customer table. The relevant evidence is that valid records fit the specified columns while malformed field types are caught.

Microsoft Azure Data Fundamentals (DP-900) Practice Tests