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Microsoft DP-900 Practice Test 78

Question 770

A pipeline assembles and commits new blocks for a stored archive file. Which principle BEST explains the correct Block blob file uploads design decision?

  1. Request-rate limits protect provisioned throughput and require graceful client handling.
  2. The Table API can support Table-style entity access within Cosmos DB.
  3. Lifecycle management automates object policy based on supported filters and timing.
  4. Block blobs suit file and streaming upload scenarios with manageable blocks.

Explanation

Correct Answer

D:

Block blobs suit file and streaming upload scenarios with manageable blocks. In this case the applicable decision is to use block blobs and their supported block upload/commit operations.

Incorrect Answers

A:

Request-rate limits protect provisioned throughput and require graceful client handling. That concept explains Cosmos DB 429 throttling retries; the situation instead concerns Block blob file uploads. Calling a block blob an append-only audit stream misstates its semantics.

B:

The Table API can support Table-style entity access within Cosmos DB. That concept explains Cosmos DB API for Table compatibility; the situation instead concerns Block blob file uploads. Calling a block blob an append-only audit stream misstates its semantics.

C:

Lifecycle management automates object policy based on supported filters and timing. That concept explains Blob lifecycle management rules; the situation instead concerns Block blob file uploads. Calling a block blob an append-only audit stream misstates its semantics.

Question 771

A telemetry lookup needs simple wide entities but no relational joins. What is the MOST appropriate next validation or correction?

  1. Rename a Table Storage entity to CREATE TABLE and assume it supports SQL joins.
  2. Reconcile source changes and downstream checkpoints through a test.
  3. Test point lookups and design partition-key distribution.
  4. Test document fetches separately from invoice property filtering.

Explanation

Correct Answer

C:

Test point lookups and design partition-key distribution. This tests the intended result: records are efficiently looked up by intended PartitionKey and RowKey.

Incorrect Answers

A:

Rename a Table Storage entity to CREATE TABLE and assume it supports SQL joins. This unsafe shortcut leaves the Azure Table Storage key-value entities problem unresolved. Expecting server-side joins and foreign keys in Table Storage fails.

B:

Reconcile source changes and downstream checkpoints through a test. It tests CDC incremental change propagation rather than the critical Azure Table Storage key-value entities behavior. Table Storage is a key-attribute NoSQL store not a relational SQL engine.

D:

Test document fetches separately from invoice property filtering. It tests File store versus database selection rather than the critical Azure Table Storage key-value entities behavior. Table Storage is a key-attribute NoSQL store not a relational SQL engine.

Question 772

An import displays corrupted accents and misreads commas used as decimal separators. Select TWO statements that correctly describe the Text encoding and numeric parsing implementation and how it can be verified.

  1. Run a scheduled batch ingestion with clear checkpoints and retries.
  2. Sample accents and amounts survive round-trip without becoming different values.
  3. Choose explicit text encoding and locale-aware numeric conversion rules.
  4. Strip all non-ASCII characters to make every international customer name valid.
  5. Maintain metadata fields or indexes alongside immutable media object content.

Explanation

Correct Answers

B:

Sample accents and amounts survive round-trip without becoming different values. This is directly observable success evidence for Text encoding and numeric parsing.

C:

Choose explicit text encoding and locale-aware numeric conversion rules. This is an appropriate action for the Text encoding and numeric parsing case. Data representation includes encoding and type interpretation beyond the filename.

Incorrect Answers

A:

Run a scheduled batch ingestion with clear checkpoints and retries. This implements Batch scheduled processing instead of the required Text encoding and numeric parsing function. Data representation includes encoding and type interpretation beyond the filename.

D:

Strip all non-ASCII characters to make every international customer name valid. This is not a safe or appropriate Text encoding and numeric parsing implementation. Treating localized decimals as strings can silently corrupt arithmetic.

E:

Maintain metadata fields or indexes alongside immutable media object content. This implements Binary object metadata separation instead of the required Text encoding and numeric parsing function. Data representation includes encoding and type interpretation beyond the filename.

Question 773

A transform runs before its upstream import finishes. After selecting the proper Data engineer orchestration dependencies approach, which observation gives the clearest evidence of success?

  1. Tests confirm analysts can SELECT approved data but cannot DROP tables.
  2. Aggregates group actual status codes rather than arbitrary matching text.
  3. Downstream stages start only after successful prerequisites.
  4. Observed quality metrics identify incomplete or duplicate data before publishing.

Explanation

Correct Answer

C:

Downstream stages start only after successful prerequisites. This is the directly observable result for Data engineer orchestration dependencies; orchestration governs execution sequence and retry behavior of data pipelines.

Incorrect Answers

A:

Tests confirm analysts can SELECT approved data but cannot DROP tables. This supports DBA least privilege account roles, not confirmation of Data engineer orchestration dependencies. The relevant evidence is that downstream stages start only after successful prerequisites.

B:

Aggregates group actual status codes rather than arbitrary matching text. This supports Log text extraction versus structured event fields, not confirmation of Data engineer orchestration dependencies. The relevant evidence is that downstream stages start only after successful prerequisites.

D:

Observed quality metrics identify incomplete or duplicate data before publishing. This supports Data quality completeness and accuracy, not confirmation of Data engineer orchestration dependencies. The relevant evidence is that downstream stages start only after successful prerequisites.

Question 774

Analysts need a workflow when a real-time condition persists. Which principle BEST explains the correct Fabric Activator rule-triggered action design decision?

  1. RLS filters data access in a semantic model by identity or role.
  2. Line charts effectively show change across time.
  3. Activator turns detected data conditions into governed actions.
  4. Event time differs from ingestion or compute processing time.

Explanation

Correct Answer

C:

Activator turns detected data conditions into governed actions. In this case the applicable decision is to configure Fabric Activator rules over a supported event or query signal.

Incorrect Answers

A:

RLS filters data access in a semantic model by identity or role. That concept explains Power BI row-level security RLS; the situation instead concerns Fabric Activator rule-triggered action. Without a rule/action connection monitoring does not imply automatic response.

B:

Line charts effectively show change across time. That concept explains Line chart time-series selection; the situation instead concerns Fabric Activator rule-triggered action. Without a rule/action connection monitoring does not imply automatic response.

D:

Event time differs from ingestion or compute processing time. That concept explains Event time versus processing time; the situation instead concerns Fabric Activator rule-triggered action. Without a rule/action connection monitoring does not imply automatic response.

Question 775

Database storage usage rises quickly near a capacity limit. If the relevant DBA monitoring capacity and alerts safeguard is skipped, which failure is MOST directly associated with that omission?

  1. Assuming cloud-managed storage always eliminates backup planning risks unrecoverable mistakes.
  2. Ignoring resource trends can cause preventable unavailability.
  3. Assuming any flat blob container has identical POSIX-style directory operations can break workflows.
  4. Assuming every document database query automatically provides relevance ranking can disappoint users.

Explanation

Correct Answer

B:

Ignoring resource trends can cause preventable unavailability. Database operations require health monitoring and capacity planning. A suitable check is to review resource utilization and alert tests on realistic load.

Incorrect Answers

A:

Assuming cloud-managed storage always eliminates backup planning risks unrecoverable mistakes. This failure is associated with DBA backup and recovery responsibility; it is not the primary failure in the stated DBA monitoring capacity and alerts scenario. Database operations require health monitoring and capacity planning.

C:

Assuming any flat blob container has identical POSIX-style directory operations can break workflows. This failure is associated with Azure Data Lake Storage Gen2 analytics landing; it is not the primary failure in the stated DBA monitoring capacity and alerts scenario. Database operations require health monitoring and capacity planning.

D:

Assuming every document database query automatically provides relevance ranking can disappoint users. This failure is associated with Document indexing versus full-text search; it is not the primary failure in the stated DBA monitoring capacity and alerts scenario. Database operations require health monitoring and capacity planning.

Question 776

Financial archives must resist deletion before regulatory retention expires. If the relevant Immutable blob retention and legal hold safeguard is skipped, which failure is MOST directly associated with that omission?

  1. Expecting cross-table foreign keys in the NoSQL API can break designs.
  2. Locking an incorrect period can create costly irreversible obligations.
  3. One hot key can throttle even when account capacity is increased.
  4. Treating virtual folder name prefixes as identical to hierarchical directory ACLs can fail.

Explanation

Correct Answer

B:

Locking an incorrect period can create costly irreversible obligations. Immutability protects retained objects through enforceable storage policy. A suitable check is to test delete denial with approved test data before locking settings.

Incorrect Answers

A:

Expecting cross-table foreign keys in the NoSQL API can break designs. This failure is associated with Cosmos DB API for NoSQL versus SQL text; it is not the primary failure in the stated Immutable blob retention and legal hold scenario. Immutability protects retained objects through enforceable storage policy.

C:

One hot key can throttle even when account capacity is increased. This failure is associated with Cosmos DB logical partition key; it is not the primary failure in the stated Immutable blob retention and legal hold scenario. Immutability protects retained objects through enforceable storage policy.

D:

Treating virtual folder name prefixes as identical to hierarchical directory ACLs can fail. This failure is associated with ADLS Gen2 hierarchical namespace; it is not the primary failure in the stated Immutable blob retention and legal hold scenario. Immutability protects retained objects through enforceable storage policy.

Question 777

A finance database must reject invoices lacking required currency codes. Select TWO statements that correctly describe the Schema-on-read versus schema-on-write implementation and how it can be verified.

  1. Analytics can interpret new fields while finance inserts enforce mandatory constraints.
  2. Choose schema-on-read for controlled flexible ingestion and schema-on-write for strict transactional validation.
  3. Prefer Parquet column-oriented files with suitable compression for column-selective analytics.
  4. Claim schema-on-read means data never needs data quality rules.
  5. Choose Azure SQL Database PaaS with appropriate compute and resilience settings.

Explanation

Correct Answers

A:

Analytics can interpret new fields while finance inserts enforce mandatory constraints. This is directly observable success evidence for Schema-on-read versus schema-on-write.

B:

Choose schema-on-read for controlled flexible ingestion and schema-on-write for strict transactional validation. This is an appropriate action for the Schema-on-read versus schema-on-write case. Schema enforcement timing differs between flexible raw storage and strongly typed operational stores.

Incorrect Answers

C:

Prefer Parquet column-oriented files with suitable compression for column-selective analytics. This implements Parquet columnar analytical file instead of the required Schema-on-read versus schema-on-write function. Schema enforcement timing differs between flexible raw storage and strongly typed operational stores.

D:

Claim schema-on-read means data never needs data quality rules. This is not a safe or appropriate Schema-on-read versus schema-on-write implementation. Deferring all validation for payment records can admit unusable transactions.

E:

Choose Azure SQL Database PaaS with appropriate compute and resilience settings. This implements Azure SQL Database managed relational app instead of the required Schema-on-read versus schema-on-write function. Schema enforcement timing differs between flexible raw storage and strongly typed operational stores.

Question 778

Changing the order date requires editing every line item. What is the MOST appropriate next validation or correction?

  1. Measure replica lag and application connection intent.
  2. Keep duplicated order header fields because a composite key always requires duplicates.
  3. Check each nonkey attribute against the entire composite key.
  4. Test column visibility with approved and unapproved users.

Explanation

Correct Answer

C:

Check each nonkey attribute against the entire composite key. This tests the intended result: updating an order date requires one logical header change.

Incorrect Answers

A:

Measure replica lag and application connection intent. It tests Azure SQL read scale and reporting replicas rather than the critical Second normal form partial dependency behavior. Second normal form removes partial dependencies on a composite key.

B:

Keep duplicated order header fields because a composite key always requires duplicates. This unsafe shortcut leaves the Second normal form partial dependency problem unresolved. Repeated header attributes create inconsistent multirow updates.

D:

Test column visibility with approved and unapproved users. It tests SQL view virtual query object rather than the critical Second normal form partial dependency behavior. Second normal form removes partial dependencies on a composite key.

Question 779

A team publishes an interactive multi-page analytical report to coworkers. Select TWO statements that correctly describe the Power BI reports dashboards and sharing implementation and how it can be verified.

  1. Distinguish multi-page reports from service dashboards and share through correct workspace/app policy.
  2. Build an appropriate date hierarchy and enable drill-down interactions.
  3. Pin a screenshot to a wall and call it a live Power BI dashboard with governed sharing.
  4. Intended users can view the right report pages or dashboard tiles with governed permissions.
  5. Configure Fabric Activator rules over a supported event or query signal.

Explanation

Correct Answers

A:

Distinguish multi-page reports from service dashboards and share through correct workspace/app policy. This is an appropriate action for the Power BI reports dashboards and sharing case. Reports and dashboards have different presentation and interaction roles.

D:

Intended users can view the right report pages or dashboard tiles with governed permissions. This is directly observable success evidence for Power BI reports dashboards and sharing.

Incorrect Answers

B:

Build an appropriate date hierarchy and enable drill-down interactions. This implements Drill-down hierarchy for time instead of the required Power BI reports dashboards and sharing function. Reports and dashboards have different presentation and interaction roles.

C:

Pin a screenshot to a wall and call it a live Power BI dashboard with governed sharing. This is not a safe or appropriate Power BI reports dashboards and sharing implementation. Sharing one report URL does not automatically authorize every underlying data source.

E:

Configure Fabric Activator rules over a supported event or query signal. This implements Fabric Activator rule-triggered action instead of the required Power BI reports dashboards and sharing function. Reports and dashboards have different presentation and interaction roles.

Question 780

A stock clerk needs to add an item adjust its price and retire a discontinued row. After selecting the proper INSERT UPDATE DELETE DML approach, which observation gives the clearest evidence of success?

  1. The intended rows change while unrelated records remain intact.
  2. Customers without orders remain visible with null child values.
  3. Authorized identities connect within assigned privileges and revoked users fail.
  4. Allowed read-only workloads use designated replicas without violating freshness needs.

Explanation

Correct Answer

A:

The intended rows change while unrelated records remain intact. This is the directly observable result for INSERT UPDATE DELETE DML; data manipulation language changes rows rather than defining the schema.

Incorrect Answers

B:

Customers without orders remain visible with null child values. This supports Left outer join preserving parents, not confirmation of INSERT UPDATE DELETE DML. The relevant evidence is that the intended rows change while unrelated records remain intact.

C:

Authorized identities connect within assigned privileges and revoked users fail. This supports Azure SQL authentication and Entra identity, not confirmation of INSERT UPDATE DELETE DML. The relevant evidence is that the intended rows change while unrelated records remain intact.

D:

Allowed read-only workloads use designated replicas without violating freshness needs. This supports Azure SQL read scale and reporting replicas, not confirmation of INSERT UPDATE DELETE DML. The relevant evidence is that the intended rows change while unrelated records remain intact.

Microsoft Azure Data Fundamentals (DP-900) Practice Tests