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Exam Code: Certified Data Engineer Professional

Exam Name Certified Data Engineer Professional

Certification Provider: Databricks

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Databricks Certified Data Engineer Professional Practice Test 29

Question 280

A subscription billing service receives order events on an external event bus. After configuring Preserve streaming checkpoints and committed sink state, the engineer must validate: The pipeline must avoid recomputing a costly historical topic replay on every restart. What evidence is decisive?

  1. The bronze table retains payload, timestamps and source offset metadata
  2. Events decode to intended fields or route invalid payloads to quarantine
  3. Repeated deliveries contribute only one business transaction
  4. The query resumes after the most recently committed message offset

Explanation

Correct Answer

D:

The query resumes after the most recently committed message offset directly measures whether Preserve streaming checkpoints and committed sink state achieved the requirement “The pipeline must avoid recomputing a costly historical topic replay on every restart.” It checks the operating result rather than just a configured resource name.

Incorrect Answers

A:

The bronze table retains payload, timestamps and source offset metadata pertains to a different control (Write append-only raw events with source metadata into Delta bronze storage) and a different need (The consumer must retain a durable bronze record of all accepted messages). It cannot establish that Preserve streaming checkpoints and committed sink state met the stated goal.

B:

That observation is a valid indicator for “Multiple event schemas coexist on one topic and must be decoded safely” when using Select the schema using an event type or schema identifier and apply controlled parsing. The scenario instead tests “The pipeline must avoid recomputing a costly historical topic replay on every restart”; the relevant result is The query resumes after the most recently committed message offset.

C:

This signal belongs to the adjacent case “A producer emits duplicate messages with stable business event IDs,” whose remedy is Deduplicate on the stable event ID with suitable bounded state. The observed result for the present requirement is The query resumes after the most recently committed message offset.

Question 281

A regional commerce company wants incremental relational-source replication to Databricks. A design review specifies the following target: A PostgreSQL source must capture updates without reloading the full database on each run. Which action is most appropriate?

  1. Configure a supported Lakeflow Connect SQL Server CDC connector
  2. Use a governed JDBC or supported query-based batch ingestion process
  3. Configure Lakeflow Connect PostgreSQL CDC with supported logical replication
  4. Create the required source publication and replication slot with suitable privileges

Explanation

Correct Answer

C:

For this scenario, Configure Lakeflow Connect PostgreSQL CDC with supported logical replication implements the behavior required by “A PostgreSQL source must capture updates without reloading the full database on each run.” Check the resulting state against: New source updates appear incrementally in the destination Delta table.

Incorrect Answers

A:

The alternative Configure a supported Lakeflow Connect SQL Server CDC connector has a distinct purpose—The source is SQL Server and the platform needs a managed incremental load. It would not establish the required outcome (A PostgreSQL source must capture updates without reloading the full database on each run); the necessary verification concerns New source updates appear incrementally in the destination Delta table.

B:

Use a governed JDBC or supported query-based batch ingestion process belongs to the separate case “A database source has no supported managed CDC connector and only occasional small snapshots are needed,” where The scheduled import completes with the expected full snapshot records would be expected. That differs from the condition in this stem: “A PostgreSQL source must capture updates without reloading the full database on each run.”

D:

Create the required source publication and replication slot with suitable privileges belongs to the separate case “The PostgreSQL replication feed is failing because source publications were never configured,” where The ingestion gateway consumes a running logical replication stream would be expected. That differs from the condition in this stem: “A PostgreSQL source must capture updates without reloading the full database on each run.”

Question 282

A regional commerce company wants incremental relational-source replication to Databricks. The team implements Configure Lakeflow Connect PostgreSQL CDC with supported logical replication. The goal was: A PostgreSQL source must capture updates without reloading the full database on each run. Which observed result best verifies success?

  1. The scheduled import completes with the expected full snapshot records
  2. The ingestion gateway consumes a running logical replication stream
  3. Source inserts, updates and deletes propagate according to connector semantics
  4. New source updates appear incrementally in the destination Delta table

Explanation

Correct Answer

D:

New source updates appear incrementally in the destination Delta table is the matching outcome for the implemented control (Configure Lakeflow Connect PostgreSQL CDC with supported logical replication) and the stated requirement “A PostgreSQL source must capture updates without reloading the full database on each run.”

Incorrect Answers

A:

That observation is a valid indicator for “A database source has no supported managed CDC connector and only occasional small snapshots are needed” when using Use a governed JDBC or supported query-based batch ingestion process. The scenario instead tests “A PostgreSQL source must capture updates without reloading the full database on each run”; the relevant result is New source updates appear incrementally in the destination Delta table.

B:

The ingestion gateway consumes a running logical replication stream pertains to a different control (Create the required source publication and replication slot with suitable privileges) and a different need (The PostgreSQL replication feed is failing because source publications were never configured). It cannot establish that Configure Lakeflow Connect PostgreSQL CDC with supported logical replication met the stated goal.

C:

Source inserts, updates and deletes propagate according to connector semantics would demonstrate the separate action Configure a supported Lakeflow Connect SQL Server CDC connector, which addresses “The source is SQL Server and the platform needs a managed incremental load.” It does not verify the requirement “A PostgreSQL source must capture updates without reloading the full database on each run” following Configure Lakeflow Connect PostgreSQL CDC with supported logical replication.

Question 283

A regional commerce company wants incremental relational-source replication to Databricks. The change request states: The PostgreSQL replication feed is failing because source publications were never configured. Which implementation best satisfies that requirement?

  1. Configure a supported Lakeflow Connect SQL Server CDC connector
  2. Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline
  3. Use a governed JDBC or supported query-based batch ingestion process
  4. Create the required source publication and replication slot with suitable privileges

Explanation

Correct Answer

D:

Create the required source publication and replication slot with suitable privileges addresses the requested condition (“The PostgreSQL replication feed is failing because source publications were never configured”) rather than an adjacent platform task. The independent success check is: The ingestion gateway consumes a running logical replication stream.

Incorrect Answers

A:

Configure a supported Lakeflow Connect SQL Server CDC connector belongs to the separate case “The source is SQL Server and the platform needs a managed incremental load,” where Source inserts, updates and deletes propagate according to connector semantics would be expected. That differs from the condition in this stem: “The PostgreSQL replication feed is failing because source publications were never configured.”

B:

Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline is appropriate when “The source is MySQL and a managed connector can consume its supported change log”; it would be verified by Source changes update the managed target without manual table extracts. It does not directly satisfy “The PostgreSQL replication feed is failing because source publications were never configured,” whose relevant acceptance evidence is The ingestion gateway consumes a running logical replication stream.

C:

Use a governed JDBC or supported query-based batch ingestion process is appropriate when “A database source has no supported managed CDC connector and only occasional small snapshots are needed”; it would be verified by The scheduled import completes with the expected full snapshot records. It does not directly satisfy “The PostgreSQL replication feed is failing because source publications were never configured,” whose relevant acceptance evidence is The ingestion gateway consumes a running logical replication stream.

Question 284

A regional commerce company wants incremental relational-source replication to Databricks. An auditor must prove the outcome of Create the required source publication and replication slot with suitable privileges for this requirement: The PostgreSQL replication feed is failing because source publications were never configured. Which test result is best?

  1. Source changes update the managed target without manual table extracts
  2. The scheduled import completes with the expected full snapshot records
  3. The ingestion gateway consumes a running logical replication stream
  4. New source updates appear incrementally in the destination Delta table

Explanation

Correct Answer

C:

The acceptance criterion for “The PostgreSQL replication feed is failing because source publications were never configured” is The ingestion gateway consumes a running logical replication stream; this is the expected evidence after Create the required source publication and replication slot with suitable privileges.

Incorrect Answers

A:

Source changes update the managed target without manual table extracts pertains to a different control (Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline) and a different need (The source is MySQL and a managed connector can consume its supported change log). It cannot establish that Create the required source publication and replication slot with suitable privileges met the stated goal.

B:

The scheduled import completes with the expected full snapshot records pertains to a different control (Use a governed JDBC or supported query-based batch ingestion process) and a different need (A database source has no supported managed CDC connector and only occasional small snapshots are needed). It cannot establish that Create the required source publication and replication slot with suitable privileges met the stated goal.

D:

New source updates appear incrementally in the destination Delta table pertains to a different control (Configure Lakeflow Connect PostgreSQL CDC with supported logical replication) and a different need (A PostgreSQL source must capture updates without reloading the full database on each run). It cannot establish that Create the required source publication and replication slot with suitable privileges met the stated goal.

Question 285

A regional commerce company wants incremental relational-source replication to Databricks. Production acceptance depends on this condition: The source is MySQL and a managed connector can consume its supported change log. What should the engineer configure?

  1. Configure Lakeflow Connect PostgreSQL CDC with supported logical replication
  2. Create the required source publication and replication slot with suitable privileges
  3. Use a governed JDBC or supported query-based batch ingestion process
  4. Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline

Explanation

Correct Answer

D:

The requirement concerns “The source is MySQL and a managed connector can consume its supported change log.” The selected operation, Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline, is the direct engineering control. Its effect can be checked by confirming: Source changes update the managed target without manual table extracts.

Incorrect Answers

A:

Configure Lakeflow Connect PostgreSQL CDC with supported logical replication is appropriate when “A PostgreSQL source must capture updates without reloading the full database on each run”; it would be verified by New source updates appear incrementally in the destination Delta table. It does not directly satisfy “The source is MySQL and a managed connector can consume its supported change log,” whose relevant acceptance evidence is Source changes update the managed target without manual table extracts.

B:

This action solves a different issue: “The PostgreSQL replication feed is failing because source publications were never configured.” Its normal signal is The ingestion gateway consumes a running logical replication stream. Here the requested behavior is “The source is MySQL and a managed connector can consume its supported change log,” so that signal is not sufficient.

C:

Use a governed JDBC or supported query-based batch ingestion process is appropriate when “A database source has no supported managed CDC connector and only occasional small snapshots are needed”; it would be verified by The scheduled import completes with the expected full snapshot records. It does not directly satisfy “The source is MySQL and a managed connector can consume its supported change log,” whose relevant acceptance evidence is Source changes update the managed target without manual table extracts.

Question 286

A regional commerce company wants incremental relational-source replication to Databricks. The change record shows Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline. The acceptance test concerns: The source is MySQL and a managed connector can consume its supported change log. Which outcome confirms it?

  1. The ingestion gateway consumes a running logical replication stream
  2. Source inserts, updates and deletes propagate according to connector semantics
  3. Source changes update the managed target without manual table extracts
  4. The scheduled import completes with the expected full snapshot records

Explanation

Correct Answer

C:

The team used Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline to fulfill “The source is MySQL and a managed connector can consume its supported change log.” Observing Source changes update the managed target without manual table extracts confirms the intended effect in the resulting workload.

Incorrect Answers

A:

The ingestion gateway consumes a running logical replication stream pertains to a different control (Create the required source publication and replication slot with suitable privileges) and a different need (The PostgreSQL replication feed is failing because source publications were never configured). It cannot establish that Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline met the stated goal.

B:

Source inserts, updates and deletes propagate according to connector semantics pertains to a different control (Configure a supported Lakeflow Connect SQL Server CDC connector) and a different need (The source is SQL Server and the platform needs a managed incremental load). It cannot establish that Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline met the stated goal.

D:

The scheduled import completes with the expected full snapshot records pertains to a different control (Use a governed JDBC or supported query-based batch ingestion process) and a different need (A database source has no supported managed CDC connector and only occasional small snapshots are needed). It cannot establish that Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline met the stated goal.

Question 287

A regional commerce company wants incremental relational-source replication to Databricks. The current design is incomplete because: The source is SQL Server and the platform needs a managed incremental load. Which change addresses it directly?

  1. Configure Lakeflow Connect PostgreSQL CDC with supported logical replication
  2. Configure a supported Lakeflow Connect SQL Server CDC connector
  3. Create the required source publication and replication slot with suitable privileges
  4. Use a governed JDBC or supported query-based batch ingestion process

Explanation

Correct Answer

B:

The requirement concerns “The source is SQL Server and the platform needs a managed incremental load.” The selected operation, Configure a supported Lakeflow Connect SQL Server CDC connector, is the direct engineering control. Its effect can be checked by confirming: Source inserts, updates and deletes propagate according to connector semantics.

Incorrect Answers

A:

Configure Lakeflow Connect PostgreSQL CDC with supported logical replication belongs to the separate case “A PostgreSQL source must capture updates without reloading the full database on each run,” where New source updates appear incrementally in the destination Delta table would be expected. That differs from the condition in this stem: “The source is SQL Server and the platform needs a managed incremental load.”

C:

Create the required source publication and replication slot with suitable privileges belongs to the separate case “The PostgreSQL replication feed is failing because source publications were never configured,” where The ingestion gateway consumes a running logical replication stream would be expected. That differs from the condition in this stem: “The source is SQL Server and the platform needs a managed incremental load.”

D:

The alternative Use a governed JDBC or supported query-based batch ingestion process has a distinct purpose—A database source has no supported managed CDC connector and only occasional small snapshots are needed. It would not establish the required outcome (The source is SQL Server and the platform needs a managed incremental load); the necessary verification concerns Source inserts, updates and deletes propagate according to connector semantics.

Question 288

A regional commerce company wants incremental relational-source replication to Databricks. Following Configure a supported Lakeflow Connect SQL Server CDC connector, the incident team needs evidence that The source is SQL Server and the platform needs a managed incremental load. Which observation supports closure?

  1. Source inserts, updates and deletes propagate according to connector semantics
  2. Source changes update the managed target without manual table extracts
  3. The scheduled import completes with the expected full snapshot records
  4. The ingestion gateway consumes a running logical replication stream

Explanation

Correct Answer

A:

Source inserts, updates and deletes propagate according to connector semantics directly measures whether Configure a supported Lakeflow Connect SQL Server CDC connector achieved the requirement “The source is SQL Server and the platform needs a managed incremental load.” It checks the operating result rather than just a configured resource name.

Incorrect Answers

B:

That observation is a valid indicator for “The source is MySQL and a managed connector can consume its supported change log” when using Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline. The scenario instead tests “The source is SQL Server and the platform needs a managed incremental load”; the relevant result is Source inserts, updates and deletes propagate according to connector semantics.

C:

This signal belongs to the adjacent case “A database source has no supported managed CDC connector and only occasional small snapshots are needed,” whose remedy is Use a governed JDBC or supported query-based batch ingestion process. The observed result for the present requirement is Source inserts, updates and deletes propagate according to connector semantics.

D:

That observation is a valid indicator for “The PostgreSQL replication feed is failing because source publications were never configured” when using Create the required source publication and replication slot with suitable privileges. The scenario instead tests “The source is SQL Server and the platform needs a managed incremental load”; the relevant result is Source inserts, updates and deletes propagate according to connector semantics.

Question 289

A regional commerce company wants incremental relational-source replication to Databricks. A design review specifies the following target: A database source has no supported managed CDC connector and only occasional small snapshots are needed. Which action is most appropriate?

  1. Create the required source publication and replication slot with suitable privileges
  2. Configure a supported Lakeflow Connect SQL Server CDC connector
  3. Configure the Lakeflow Connect MySQL CDC ingestion connection and pipeline
  4. Use a governed JDBC or supported query-based batch ingestion process

Explanation

Correct Answer

D:

The requirement concerns “A database source has no supported managed CDC connector and only occasional small snapshots are needed.” The selected operation, Use a governed JDBC or supported query-based batch ingestion process, is the direct engineering control. Its effect can be checked by confirming: The scheduled import completes with the expected full snapshot records.

Incorrect Answers

A:

The alternative Create the required source publication and replication slot with suitable privileges has a distinct purpose—The PostgreSQL replication feed is failing because source publications were never configured. It would not establish the required outcome (A database source has no supported managed CDC connector and only occasional small snapshots are needed); the necessary verification concerns The scheduled import completes with the expected full snapshot records.

B:

This action solves a different issue: “The source is SQL Server and the platform needs a managed incremental load.” Its normal signal is Source inserts, updates and deletes propagate according to connector semantics. Here the requested behavior is “A database source has no supported managed CDC connector and only occasional small snapshots are needed,” so that signal is not sufficient.

C:

This action solves a different issue: “The source is MySQL and a managed connector can consume its supported change log.” Its normal signal is Source changes update the managed target without manual table extracts. Here the requested behavior is “A database source has no supported managed CDC connector and only occasional small snapshots are needed,” so that signal is not sufficient.

Question 290

A regional commerce company wants incremental relational-source replication to Databricks. After configuring Use a governed JDBC or supported query-based batch ingestion process, the engineer must validate: A database source has no supported managed CDC connector and only occasional small snapshots are needed. What evidence is decisive?

  1. The scheduled import completes with the expected full snapshot records
  2. The ingestion gateway consumes a running logical replication stream
  3. New source updates appear incrementally in the destination Delta table
  4. Source inserts, updates and deletes propagate according to connector semantics

Explanation

Correct Answer

A:

The team used Use a governed JDBC or supported query-based batch ingestion process to fulfill “A database source has no supported managed CDC connector and only occasional small snapshots are needed.” Observing The scheduled import completes with the expected full snapshot records confirms the intended effect in the resulting workload.

Incorrect Answers

B:

This signal belongs to the adjacent case “The PostgreSQL replication feed is failing because source publications were never configured,” whose remedy is Create the required source publication and replication slot with suitable privileges. The observed result for the present requirement is The scheduled import completes with the expected full snapshot records.

C:

This signal belongs to the adjacent case “A PostgreSQL source must capture updates without reloading the full database on each run,” whose remedy is Configure Lakeflow Connect PostgreSQL CDC with supported logical replication. The observed result for the present requirement is The scheduled import completes with the expected full snapshot records.

D:

Source inserts, updates and deletes propagate according to connector semantics pertains to a different control (Configure a supported Lakeflow Connect SQL Server CDC connector) and a different need (The source is SQL Server and the platform needs a managed incremental load). It cannot establish that Use a governed JDBC or supported query-based batch ingestion process met the stated goal.