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Certified Data Engineer Associate Practice Test 13

Question 120

A bank requires retaining unrecognized fields in an otherwise valid JSON event while forbidding unreviewed new columns in the destination table.

Which acceptance result most directly demonstrates that the intended solution works?

  1. A new field follows the configured explicit-schema handling rather than unexpectedly altering the registered schema.
  2. The pipeline resumes without replay after a processing restart, and the root cause is observable in run metrics.
  3. New source properties appear in rescued JSON without changing the curated column contract.
  4. An authorized support user resolves a target record to its source path without receiving broad bucket credentials.

Explanation

Correct Answer

C:

A rescue strategy keeps schema stable and preserves unknown attributes for downstream review.

Incorrect Answers

A:

A new field follows the configured explicit-schema handling rather than unexpectedly altering the registered schema. That finding does not establish that new source properties appear in rescued JSON without changing the curated column contract.

B:

The pipeline resumes without replay after a processing restart, and the root cause is observable in run metrics. That finding does not establish that new source properties appear in rescued JSON without changing the curated column contract.

D:

An authorized support user resolves a target record to its source path without receiving broad bucket credentials. That finding does not establish that new source properties appear in rescued JSON without changing the curated column contract.

Question 121

An Auto Loader job receives an explicit fixed schema and a developer assumes its default evolution mode will still add columns automatically.

Which implementation decision best addresses this requirement?

  1. Choose an intentional compatible evolution mode or schema hints rather than assuming addNewColumns works with an explicit schema.
  2. Assign each distinct Auto Loader stream its own durable checkpoint directory.
  3. Configure initial backfill behavior and subsequent discovery for the chosen Auto Loader mode.
  4. Use a separate MERGE-based transformation after file ingestion when keyed upsert semantics are required.

Explanation

Correct Answer

A:

The default evolution behavior differs when an explicit schema is supplied, and automatic additions require compatible configuration. The selected implementation is the one directly aligned with the constraints in the scenario.

Incorrect Answers

B:

Checkpoint state belongs to one logical streaming query and must not be shared across independent sources.

C:

Initial existing-file ingestion and ongoing file discovery are separate phases that need deliberate configuration.

D:

COPY INTO ingests source files idempotently; it does not automatically reconcile business-key updates and deletes into a curated table.

Question 122

An Auto Loader job receives an explicit fixed schema and a developer assumes its default evolution mode will still add columns automatically.

Which acceptance result most directly demonstrates that the intended solution works?

  1. Each stream restarts independently without mixing offsets or processed-file histories with its neighbors.
  2. Both the initial backlog and a later newly uploaded file appear once in the target.
  3. A new field follows the configured explicit-schema handling rather than unexpectedly altering the registered schema.
  4. A changed customer record updates the existing curated key rather than creating a second current customer.

Explanation

Correct Answer

C:

The default evolution behavior differs when an explicit schema is supplied, and automatic additions require compatible configuration.

Incorrect Answers

A:

Each stream restarts independently without mixing offsets or processed-file histories with its neighbors. That finding does not establish that a new field follows the configured explicit-schema handling rather than unexpectedly altering the registered schema.

B:

Both the initial backlog and a later newly uploaded file appear once in the target. That finding does not establish that a new field follows the configured explicit-schema handling rather than unexpectedly altering the registered schema.

D:

A changed customer record updates the existing curated key rather than creating a second current customer. That finding does not establish that a new field follows the configured explicit-schema handling rather than unexpectedly altering the registered schema.

Question 123

A shared container has three independent Auto Loader pipelines reading different input prefixes, but their checkpoints have been configured to the same directory.

Which implementation decision best addresses this requirement?

  1. Preserve the existing checkpoint and diagnose the slowdown without resetting stream identity.
  2. Assign each distinct Auto Loader stream its own durable checkpoint directory.
  3. Plan an appropriate backfill of preexisting objects when switching discovery methods.
  4. Apply change processing that interprets source delete operations rather than simply appending every CDC envelope.

Explanation

Correct Answer

B:

Checkpoint state belongs to one logical streaming query and must not be shared across independent sources. The selected implementation is the one directly aligned with the constraints in the scenario.

Incorrect Answers

A:

Clearing progress state can cause reprocessing and is not a safe generic performance fix.

C:

An event feed begins at a defined point, so older objects may need an intentional discovery process.

D:

Change-data capture carries operation semantics, and deleting a business key differs from inserting a new event row.

Question 124

A shared container has three independent Auto Loader pipelines reading different input prefixes, but their checkpoints have been configured to the same directory.

Which acceptance result most directly demonstrates that the intended solution works?

  1. The pipeline resumes without replay after a processing restart, and the root cause is observable in run metrics.
  2. Previously present files and new notifications are both represented in the bronze table without duplicates.
  3. A delete event removes or tombstones the current-state record according to the specified business policy.
  4. Each stream restarts independently without mixing offsets or processed-file histories with its neighbors.

Explanation

Correct Answer

D:

Checkpoint state belongs to one logical streaming query and must not be shared across independent sources.

Incorrect Answers

A:

The pipeline resumes without replay after a processing restart, and the root cause is observable in run metrics. That finding does not establish that each stream restarts independently without mixing offsets or processed-file histories with its neighbors.

B:

Previously present files and new notifications are both represented in the bronze table without duplicates. That finding does not establish that each stream restarts independently without mixing offsets or processed-file histories with its neighbors.

C:

A delete event removes or tombstones the current-state record according to the specified business policy. That finding does not establish that each stream restarts independently without mixing offsets or processed-file histories with its neighbors.

Question 125

A source ingestion is moved from one workflow to another, and an operator wants to erase the checkpoint to troubleshoot slow processing.

Which implementation decision best addresses this requirement?

  1. Configure initial backfill behavior and subsequent discovery for the chosen Auto Loader mode.
  2. Preserve the existing checkpoint and diagnose the slowdown without resetting stream identity.
  3. Store source metadata and lineage in an access-controlled bronze dataset.
  4. Use the managed connector's incremental ingestion and monitored pipeline configuration where supported.

Explanation

Correct Answer

B:

Clearing progress state can cause reprocessing and is not a safe generic performance fix. The selected implementation is the one directly aligned with the constraints in the scenario.

Incorrect Answers

A:

Initial existing-file ingestion and ongoing file discovery are separate phases that need deliberate configuration.

C:

Bronze provenance lets support teams trace ingestion while Unity Catalog controls who may query source details.

D:

Source-specific managed ingestion tracks progress and retries through the connector's supported mechanisms.

Question 126

A source ingestion is moved from one workflow to another, and an operator wants to erase the checkpoint to troubleshoot slow processing.

Which acceptance result most directly demonstrates that the intended solution works?

  1. The pipeline resumes without replay after a processing restart, and the root cause is observable in run metrics.
  2. Both the initial backlog and a later newly uploaded file appear once in the target.
  3. An authorized support user resolves a target record to its source path without receiving broad bucket credentials.
  4. A restart resumes ingestion without a manual full-source extract or duplicate current-state records.

Explanation

Correct Answer

A:

Clearing progress state can cause reprocessing and is not a safe generic performance fix.

Incorrect Answers

B:

Both the initial backlog and a later newly uploaded file appear once in the target. That finding does not establish that the pipeline resumes without replay after a processing restart, and the root cause is observable in run metrics.

C:

An authorized support user resolves a target record to its source path without receiving broad bucket credentials. That finding does not establish that the pipeline resumes without replay after a processing restart, and the root cause is observable in run metrics.

D:

A restart resumes ingestion without a manual full-source extract or duplicate current-state records. That finding does not establish that the pipeline resumes without replay after a processing restart, and the root cause is observable in run metrics.

Question 127

A new incremental ingestion process should first process the files already present in storage, then watch for subsequent arrivals.

Which implementation decision best addresses this requirement?

  1. Plan an appropriate backfill of preexisting objects when switching discovery methods.
  2. Use a separate MERGE-based transformation after file ingestion when keyed upsert semantics are required.
  3. Configure initial backfill behavior and subsequent discovery for the chosen Auto Loader mode.
  4. Repair the source external-location or storage-credential access for the executing principal.

Explanation

Correct Answer

C:

Initial existing-file ingestion and ongoing file discovery are separate phases that need deliberate configuration. The selected implementation is the one directly aligned with the constraints in the scenario.

Incorrect Answers

A:

An event feed begins at a defined point, so older objects may need an intentional discovery process.

B:

COPY INTO ingests source files idempotently; it does not automatically reconcile business-key updates and deletes into a curated table.

D:

Access to the upstream storage location is distinct from SELECT privilege on destination catalog data.

Question 128

A new incremental ingestion process should first process the files already present in storage, then watch for subsequent arrivals.

Which acceptance result most directly demonstrates that the intended solution works?

  1. Both the initial backlog and a later newly uploaded file appear once in the target.
  2. Previously present files and new notifications are both represented in the bronze table without duplicates.
  3. A changed customer record updates the existing curated key rather than creating a second current customer.
  4. The principal can read only the approved source path after the proper location permission is assigned.

Explanation

Correct Answer

A:

Initial existing-file ingestion and ongoing file discovery are separate phases that need deliberate configuration.

Incorrect Answers

B:

Previously present files and new notifications are both represented in the bronze table without duplicates. That finding does not establish that both the initial backlog and a later newly uploaded file appear once in the target.

C:

A changed customer record updates the existing curated key rather than creating a second current customer. That finding does not establish that both the initial backlog and a later newly uploaded file appear once in the target.

D:

The principal can read only the approved source path after the proper location permission is assigned. That finding does not establish that both the initial backlog and a later newly uploaded file appear once in the target.

Question 129

An engineer migrates from directory listing to managed file events and assumes objects created before event delivery was enabled cannot be considered.

Which implementation decision best addresses this requirement?

  1. Store source metadata and lineage in an access-controlled bronze dataset.
  2. Apply change processing that interprets source delete operations rather than simply appending every CDC envelope.
  3. Land files in a governed volume or compatible raw-file ingest process and extract attributes separately.
  4. Plan an appropriate backfill of preexisting objects when switching discovery methods.

Explanation

Correct Answer

D:

An event feed begins at a defined point, so older objects may need an intentional discovery process. The selected implementation is the one directly aligned with the constraints in the scenario.

Incorrect Answers

A:

Bronze provenance lets support teams trace ingestion while Unity Catalog controls who may query source details.

B:

Change-data capture carries operation semantics, and deleting a business key differs from inserting a new event row.

C:

Volume storage represents file-oriented assets, while relational tables hold structured records derived from them.

Question 130

An engineer migrates from directory listing to managed file events and assumes objects created before event delivery was enabled cannot be considered.

Which acceptance result most directly demonstrates that the intended solution works?

  1. An authorized support user resolves a target record to its source path without receiving broad bucket credentials.
  2. Previously present files and new notifications are both represented in the bronze table without duplicates.
  3. A delete event removes or tombstones the current-state record according to the specified business policy.
  4. Source files retain their original bytes, and extracted metadata appears in a separately governed Delta table.

Explanation

Correct Answer

B:

An event feed begins at a defined point, so older objects may need an intentional discovery process.

Incorrect Answers

A:

An authorized support user resolves a target record to its source path without receiving broad bucket credentials. That finding does not establish that previously present files and new notifications are both represented in the bronze table without duplicates.

C:

A delete event removes or tombstones the current-state record according to the specified business policy. That finding does not establish that previously present files and new notifications are both represented in the bronze table without duplicates.

D:

Source files retain their original bytes, and extracted metadata appears in a separately governed Delta table. That finding does not establish that previously present files and new notifications are both represented in the bronze table without duplicates.

Certified Data Engineer Associate Practice Tests

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