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Microsoft PL-300 Practice Test 8

Question 70

A report must filter data according to security rules already defined in a shared source model. What is the best method for this analysis requirement?

  1. Create a separate governed development semantic model for the experiment.
  2. Reuse that semantic model with its existing RLS and permission assignments.
  3. Build reports against the certified shared semantic model.
  4. Create or reuse an approved Power BI dataflow for repeatable upstream transformations.

Explanation

Correct Answer

B:

A connected report can inherit semantic-model security rather than recreate rules independently; this helps preserve governed data-access semantics.

Incorrect Answers

A:

Separate development assets prevent unapproved changes to certified enterprise metrics. It would address isolate experimental model changes, not preserve governed data-access semantics.

C:

Central models keep shared measures and relationships under one steward. It may suit consistent enterprise KPI reuse, not preserve governed data-access semantics.

D:

Dataflows centralize Power Query transformation logic for multiple downstream consumers. It is useful for reusable data preparation across reports, not for preserving governed data-access semantics.

Question 71

A report should reuse a team's governed data model and the current set of DAX measures. Which implementation best addresses this scenario?

  1. Choose DirectQuery if the source meets responsiveness requirements.
  2. Use supported Direct Lake semantics over the Lakehouse tables.
  3. Connect to the approved Power BI semantic model.
  4. Use an Import model refreshed before the outage.

Explanation

Correct Answer

C:

Semantic model sharing avoids redefining measures, model relationships, and security configuration, supporting reuse DAX measure definitions.

Incorrect Answers

A:

DirectQuery reads current source records during visual evaluation subject to source latency. It is useful for near-live source evaluation, not for reuse DAX measure definitions.

B:

Direct Lake is optimized for underlying OneLake Delta storage when its supported conditions are met. Its scope is analytical access to OneLake storage, not reuse DAX measure definitions.

D:

Import keeps compressed rows available without a live database connection during interaction. It would address offline report analysis during source outage, not reuse DAX measure definitions.

Question 72

An analyst must confirm which identity Power BI uses for a scheduled cloud refresh. What is the best method for this analysis requirement?

  1. Configure approved least-privileged source credentials or a managed connection.
  2. Use an approved application identity and scoped consent where the connector supports it.
  3. Remove the vendor's relevant item or workspace access and review any downstream sharing.
  4. Inspect the configured connection credentials and authentication identity in service settings.

Explanation

Correct Answer

D:

Credential configuration determines the security context used when fetching source rows, supporting audit identity used during data refresh.

Incorrect Answers

A:

Least-privileged source identities reduce risk of broad database control. It would address limit refresh credential privilege, not audit identity used during data refresh.

B:

Workload identity separates unattended service access from personal user credentials. That targets protected unattended API access, not audit identity used during data refresh.

C:

Access removal terminates permissions independently of data source refresh settings. It may suit revoke expiring collaborator authorization, not audit identity used during data refresh.

Question 73

A new business line requires changing a sales threshold in several calculations during development. Which implementation best addresses this scenario?

  1. Reference one reusable numeric parameter in the relevant queries.
  2. Use a database-name parameter referenced by each relevant Power Query.
  3. Change the parameter type to Date or DateTime and align column comparisons.
  4. Restrict a Power Query parameter to its list of allowed region values.

Explanation

Correct Answer

A:

Parameter reuse prevents inconsistent hard-coded constants across query steps, supporting consistent parameterized threshold management.

Incorrect Answers

B:

Shared parameters centralize per-environment database selection without editing all scripts. Its scope is controlled subsidiary source parameterization, not consistent parameterized threshold management.

C:

Correctly typed parameters avoid incompatible M comparisons and filter errors. That is meant for repair date parameter typing, not consistent parameterized threshold management.

D:

Suggested or fixed permitted values constrain deployment configuration to approved regions. It would address restrict dynamic source choices, not consistent parameterized threshold management.

Question 74

A web API has a cursor-based paging contract but the query retrieves only page one. What is the best method for this analysis requirement?

  1. Remove repeated header records before promoting final column headers.
  2. Implement supported pagination logic and validate continuation tokens.
  3. Select the necessary columns in a folding-friendly Power Query step.
  4. Connect to the governed aggregated view instead of raw transaction events.

Explanation

Correct Answer

B:

Cursor paging is necessary to collect all result pages under a paginated API contract, supporting complete paged API extraction.

Incorrect Answers

A:

Cleaning repeated header rows avoids treating captions as business data. It would address correct multi-block flat-file import, not complete paged API extraction.

C:

Column projection reduces data transfer and downstream model memory usage. It may suit trim acquired data to required fields, not complete paged API extraction.

D:

Matching source grain can reduce row volume without losing the needed report detail. It is useful for selecting fit-for-purpose source granularity, not for complete paged API extraction.

Question 75

A large operation produces Parquet partitions in a Fabric Lakehouse and the report must avoid copying them into a new Import cache. Which implementation best addresses this scenario?

  1. Use the Azure SQL database connector with approved credentials.
  2. Use the Excel workbook connector to import the approved sheet or table.
  3. Use supported Direct Lake over Delta tables exposed by the Lakehouse.
  4. Use a connection to the shared semantic model with necessary Build permission.

Explanation

Correct Answer

C:

Direct Lake serves supported tabular views over OneLake data without a separate full import, supporting query Fabric Lakehouse assets directly.

Incorrect Answers

A:

Azure SQL connectivity retrieves supported tables and queries from the managed relational service. It is useful for direct Azure SQL ingestion, not for querying Fabric Lakehouse assets directly.

B:

The Excel connector reads workbook tables and ranges into Power Query. Its scope is exploratory workbook import, not query Fabric Lakehouse assets directly.

D:

Build access allows creating content based on an approved semantic model without acquiring raw credentials. It would address authorized reuse of shared model, not query Fabric Lakehouse assets directly.

Question 76

A shared database login was used without documented ownership for a scheduled production refresh. What is the best method for this analysis requirement?

  1. Prefer a centrally endorsed or certified semantic model with documented owner.
  2. Reconcile source lineage and the authoritative ledger before loading the final measure.
  3. Exclude unnecessary personal fields at the earliest permitted acquisition step.
  4. Replace ad hoc credentials with an approved service-owned refresh connection.

Explanation

Correct Answer

D:

Accountable managed identities reduce orphaned access and make rotation supportable, supporting accountable production connector ownership.

Incorrect Answers

A:

Endorsed datasets have a known accountable owner and reviewed metric meaning. It would address select trusted KPI source, not accountable production connector ownership.

B:

Source-of-truth governance prevents adopting unverified alternate totals. That targets resolve competing revenue sources, not accountable production connector ownership.

C:

Data minimization reduces sensitive exposure and model footprint. It may suit minimize personally identifying source fields, not accountable production connector ownership.

Question 77

A numeric Quantity column contains nulls for records where the original source did not provide the amount; a blank must remain distinguishable from zero. Which Power BI approach BEST satisfies the stated requirement?

  1. Filter or quarantine rows whose pressure measurement is missing under the stated quality rule.
  2. Retain null values and mark the records for data-quality investigation.
  3. Replace null category values with the approved Unknown category.
  4. Merge authoritative timestamps by event key before calculating durations.

Explanation

Correct Answer

B:

A missing observation is not equivalent to a measured zero and should not be silently imputed; this helps preserve meaning of unreported quantities.

Incorrect Answers

A:

Removing unfit records from the trend prevents invalid numeric inference while retaining a documented exception path. It is useful for exclude incomplete safety-critical readings, not for preserving meaning of unreported quantities.

C:

A policy-defined missing-category value keeps segmentation explicit without fabricating observed classes. That is meant for categorize accepted unknown values, not preserve meaning of unreported quantities.

D:

Reconciliation with approved source data repairs missing timestamps without arbitrary defaults. It would address recover missing event times from trusted keys, not preserve meaning of unreported quantities.

Question 78

A vendor name arrives as ' Northwind ' with leading and trailing blanks, causing duplicate-looking slicer values. What should the report or semantic-model owner do?

  1. Apply Text.Upper after reviewing locale and source semantics.
  2. Preserve interior whitespace and correct only validated formatting defects.
  3. Apply Text.Trim to the vendor-name field in Power Query.
  4. Apply Text.Clean to remove supported nonprinting characters.

Explanation

Correct Answer

C:

Trimming removes peripheral whitespace while preserving the meaningful interior characters, supporting normalize leading and trailing spaces.

Incorrect Answers

A:

Uppercase normalization unifies equivalent code text without changing its identifiers. It would address normalize case of state codes, not normalize leading and trailing spaces.

B:

Arbitrary space removal can change identifiers that are not logically equivalent. That targets protect meaningful internal identifier spacing, not normalize leading and trailing spaces.

D:

Cleaning strips control characters that are not visible but affect comparisons. It is useful for removing nonprinting text artifacts, not for normalize leading and trailing spaces.

Question 79

An analyst needs to see null, empty and error counts for each incoming column at once. Which Power BI approach BEST satisfies the stated requirement?

  1. Enable Column distribution and review distinct and unique value counts.
  2. Enable Column profile statistics for the selected numeric column.
  3. Switch profiling to the entire dataset when feasible for validation.
  4. Enable Column quality profiling in Power Query.

Explanation

Correct Answer

D:

Column quality reports valid, error and empty proportions for the selected data, supporting inspect completeness and error rates.

Incorrect Answers

A:

Distribution summaries expose frequency and variation of column values. It is useful for inspecting categorical value frequency, not for inspecting completeness and error rates.

B:

Column profiling gives distributions and statistics for the current profiling scope. Its scope is inspect numeric profiling statistics, not inspect completeness and error rates.

C:

Full-dataset profiling can reveal issues excluded from a top-rows sample. That is meant for validate anomalies beyond sampled rows, not inspect completeness and error rates.

Question 80

A date field is imported as text and report time intelligence treats it as a category. What should the report or semantic-model owner do?

  1. Convert the field to Date with the correct locale in Power Query.
  2. Change the amount column to Decimal Number with suitable precision.
  3. Set the postal-code column to Text before loading it.
  4. Parse and normalize the timestamp with explicit timezone-handling rules.

Explanation

Correct Answer

A:

Date typing enables correct chronological comparisons and model relationships, supporting parse and type actual calendar dates.

Incorrect Answers

B:

Decimal typing retains fractional values required by financial calculations. That targets preserve noninteger numeric amounts, not parse and type actual calendar dates.

C:

Text represents an identifier without performing arithmetic or dropping leading zeros. It may suit preserve leading-zero identifiers, not parse and type actual calendar dates.

D:

Offset-aware transformation prevents comparisons between inconsistent local clocks. It is useful for standardize timezone-bearing event timestamps, not for parse and type actual calendar dates.


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