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Databricks Certified Data Engineer Associate Practice Test 33

Question 320

A data engineer at Renewable energy operator is responsible for turbine sensor messages. The library dependency conflict issue is that turbine_sensor_messages_coastal job fails after a Python library upgrade despite unchanged notebook code. The supporting evidence is that driver logs show incompatible package versions imported at startup. The engineer must ensure that dependency versions must be reproducible across production runs. The first acceptance run passed. The current task is to detect future regressions and changes over time. What repeatable measure detects this failure after go-live?

  1. Pin compatible library versions with supported compute/runtime environment
  2. Monitor library drift and import failures for turbine_sensor_messages_coastal
  3. Install random latest packages on shared production compute at Renewable energy operator
  4. Verify the failing import and transformation work in clean compute

Explanation

Correct Answer

B:

Monitor library drift and import failures for turbine_sensor_messages_coastal creates recurring visibility into the failure mode (turbine_sensor_messages_coastal job fails after a Python library upgrade despite unchanged notebook code). Unlike a single successful test, the measure can reveal drift, lag, or new failures after later source and deployment changes while dependency versions must be reproducible across production runs.

Incorrect Answers

A:

Pin compatible library versions with supported compute/runtime environment is a plausible lasting design once chosen, but it does not perform continuing operational detection at this stage. In the turbine_sensor_messages_coastal scenario, the observed evidence is that driver logs show incompatible package versions imported at startup; the requirement remains: dependency versions must be reproducible across production runs.

C:

Uncontrolled upgrades can introduce new incompatibilities. The proposed action (Install random latest packages on shared production compute at Renewable energy operator) does not meet the requirement that dependency versions must be reproducible across production runs, nor does it constitute continuing operational detection.

D:

Verify the failing import and transformation work in clean compute is a one-time acceptance check. It does not supply continuing operational detection for turbine_sensor_messages_coastal; a passing test cannot substitute for the specific task now required.

Question 321

At Community energy cooperative, the secret handling in bundle config workflow handles smart meter readings. The problem is that smart_meter_readings_central automation configuration contains an API password committed to Git. Evidence: repository scan detects a plaintext production secret in bundle variables. Constraint: configuration must remain reproducible without exposing secrets. The team has not selected a remedy. It first needs evidence that distinguishes the actual dependency or data fault. Which investigation is the strongest first step?

  1. Identify secret locations, references and exposed Git history for smart_meter_readings_central
  2. Revoke exposed credentials and replace config with secure references
  3. Reference approved secret storage or injected CI variables rather than plaintext passwords
  4. Hide the password by renaming its variable key at Community energy cooperative

Explanation

Correct Answer

A:

Identify secret locations, references and exposed Git history for smart_meter_readings_central directly investigates the evidence (repository scan detects a plaintext production secret in bundle variables) and distinguishes possible causes of smart_meter_readings_central automation configuration contains an API password committed to Git. It establishes what must be corrected without assuming a fix before verifying the stated business requirement: configuration must remain reproducible without exposing secrets.

Incorrect Answers

B:

Revoke exposed credentials and replace config with secure references may introduce a correction, but the question does not ask for installation or migration. A rollout alone cannot replace the required pre-change investigation, especially given the evidence that repository scan detects a plaintext production secret in bundle variables. Here, the relevant situation is: the secret handling in bundle config workflow handles smart meter readings. The problem is that….

C:

Reference approved secret storage or injected CI variables rather than plaintext passwords is a plausible lasting design once chosen, but it does not perform the required pre-change investigation at this stage. In the smart_meter_readings_central scenario, the observed evidence is that repository scan detects a plaintext production secret in bundle variables; the requirement remains: configuration must remain reproducible without exposing secrets.

D:

Renaming a plaintext secret does not protect it. The proposed action (Hide the password by renaming its variable key at Community energy cooperative) does not meet the requirement that configuration must remain reproducible without exposing secrets, nor does it constitute the required pre-change investigation.

Question 322

At Independent cinema group, the pipeline task invocation workflow handles ticket transactions. The problem is that ticket_transactions_highland Spark Declarative Pipeline is managed separately and not part of the daily job. Evidence: analytics runs before the pipeline produces its updated streaming table. Constraint: job orchestration must wait for pipeline update completion. The first acceptance run passed. The current task is to detect future regressions and changes over time. Which monitoring approach will detect newly emerging defects?

  1. Monitor pipeline update failures and downstream task skips for ticket_transactions_highland
  2. Assume the pipeline auto-refreshes before every dashboard query at Independent cinema group
  3. Use a Lakeflow pipeline task with success dependency before analytics tasks
  4. Trigger a full job and verify pipeline completion precedes analytics

Explanation

Correct Answer

A:

Monitor pipeline update failures and downstream task skips for ticket_transactions_highland creates recurring visibility into the failure mode (ticket_transactions_highland Spark Declarative Pipeline is managed separately and not part of the daily job). Unlike a single successful test, the measure can reveal drift, lag, or new failures after later source and deployment changes while job orchestration must wait for pipeline update completion.

Incorrect Answers

B:

Uncontrolled refresh timing does not guarantee dependency order. The proposed action (Assume the pipeline auto-refreshes before every dashboard query at Independent cinema group) does not meet the requirement that job orchestration must wait for pipeline update completion, nor does it constitute continuing operational detection.

C:

Use a Lakeflow pipeline task with success dependency before analytics tasks is a plausible lasting design once chosen, but it does not perform continuing operational detection at this stage. In the ticket_transactions_highland scenario, the observed evidence is that analytics runs before the pipeline produces its updated streaming table; the requirement remains: job orchestration must wait for pipeline update completion.

D:

Trigger a full job and verify pipeline completion precedes analytics is a one-time acceptance check. It does not supply continuing operational detection for ticket_transactions_highland; a passing test cannot substitute for the specific task now required.

Question 323

At Renewable energy operator, the table update trigger workflow handles turbine sensor messages. The problem is that turbine_sensor_messages_south downstream transformation needs to run after its governed source table changes. Evidence: the source updates irregularly while cron polling starts empty jobs. Constraint: data freshness should follow actual table changes rather than wall-clock guesses. The new approach is deployed. The current task is to prove correct output and authorized behavior, not just successful installation. Which test should pass before the new flow is accepted?

  1. Enable the data-driven trigger and run a controlled upstream update
  2. Verify that source table and trigger are supported for turbine_sensor_messages_south
  3. Modify source and confirm downstream task runs only after detectable update
  4. Schedule a blind daily task when source updates require immediate processing at Renewable energy operator

Explanation

Correct Answer

C:

Modify source and confirm downstream task runs only after detectable update directly tests the behavior that should change after the correction. With the observed evidence (the source updates irregularly while cron polling starts empty jobs), the acceptance result must demonstrate actual data or permission correctness, while retaining the requirement that data freshness should follow actual table changes rather than wall-clock guesses.

Incorrect Answers

A:

Enable the data-driven trigger and run a controlled upstream update may introduce a correction, but the question does not ask for installation or migration. A rollout alone cannot replace the post-change acceptance test, especially given the evidence that the source updates irregularly while cron polling starts empty jobs.

B:

Verify that source table and trigger are supported for turbine_sensor_messages_south could clarify the original fault, but the available evidence already establishes its scope; it is not the post-change acceptance test now requested. The turbine_sensor_messages_south workflow still requires that data freshness should follow actual table changes rather than wall-clock guesses.

D:

Coarse polling cannot consistently meet data-driven freshness. The proposed action (Schedule a blind daily task when source updates require immediate processing at Renewable energy operator) does not meet the requirement that data freshness should follow actual table changes rather than wall-clock guesses, nor does it constitute the post-change acceptance test.

Question 324

At Municipal waste service, the collection telemetry workflow depends on collection_telemetry_south. Engineers report that collection_telemetry_south ledger export is legally due at 06:00 even when no new records arrive; the evidence is that operators propose a file trigger that may not run on quiet days. They require that an empty but valid daily export must still be delivered. The first acceptance run passed. The current task is to detect future regressions and changes over time. Which ongoing alert or metric is most relevant?

  1. Monitor deadline misses and incomplete empty-day acknowledgments for collection_telemetry_south
  2. Simulate a day without files and verify on-time report generation
  3. Use a time-based schedule for mandatory daily reporting independent of arrivals
  4. Use only file-arrival triggers for a mandatory daily report at Municipal waste service

Explanation

Correct Answer

A:

Monitor deadline misses and incomplete empty-day acknowledgments for collection_telemetry_south creates recurring visibility into the failure mode (collection_telemetry_south ledger export is legally due at 06:00 even when no new records arrive). Unlike a single successful test, the measure can reveal drift, lag, or new failures after later source and deployment changes while an empty but valid daily export must still be delivered.

Incorrect Answers

B:

Simulate a day without files and verify on-time report generation is a one-time acceptance check. It does not supply continuing operational detection for collection_telemetry_south; a passing test cannot substitute for the specific task now required.

C:

Use a time-based schedule for mandatory daily reporting independent of arrivals is a plausible lasting design once chosen, but it does not perform continuing operational detection at this stage. In the collection_telemetry_south scenario, the observed evidence is that operators propose a file trigger that may not run on quiet days; the requirement remains: an empty but valid daily export must still be delivered.

D:

Quiet source days would skip the required calendar delivery. The proposed action (Use only file-arrival triggers for a mandatory daily report at Municipal waste service) does not meet the requirement that an empty but valid daily export must still be delivered, nor does it constitute continuing operational detection.

Question 325

The class_enrollment_data_north pipeline at International language school has this failure: class_enrollment_data_north gold consumers need fresh incremental data from an append-only event feed. The team observed that the source produces new events continuously while downstream reports lag by hours. Business requirement: materialized output must incorporate new events with recoverable processing state. The failure and requirements have been diagnosed; the team must select the lasting pipeline or governance approach. What lasting solution should be selected for the verified conditions?

  1. Measure source update shape, processing latency and offset semantics for class_enrollment_data_north
  2. Build a governed streaming table for continuous or triggered incremental append processing
  3. Truncate and fully rebuild the target after every incoming event at International language school
  4. Monitor stream backlog, checkpoint errors and data freshness for class_enrollment_data_north

Explanation

Correct Answer

B:

Build a governed streaming table for continuous or triggered incremental append processing is the intended durable approach for class_enrollment_data_north: it addresses the verified problem (class_enrollment_data_north gold consumers need fresh incremental data from an append-only event feed) while preserving the required behavior (materialized output must incorporate new events with recoverable processing state). A diagnostic or monitoring step alone would not create this target-state behavior.

Incorrect Answers

A:

Measure source update shape, processing latency and offset semantics for class_enrollment_data_north could clarify the original fault, but the available evidence already establishes its scope; it is not the target approach now requested. The class_enrollment_data_north workflow still requires that materialized output must incorporate new events with recoverable processing state.

C:

Full rebuilds are expensive and defeat incremental freshness goals. The proposed action (Truncate and fully rebuild the target after every incoming event at International language school) does not meet the requirement that materialized output must incorporate new events with recoverable processing state, nor does it constitute the target approach.

D:

Monitor stream backlog, checkpoint errors and data freshness for class_enrollment_data_north would help detect future recurrence, but metrics alone do not deliver the target approach. The class_enrollment_data_north requirement is that materialized output must incorporate new events with recoverable processing state.

Question 326

At National farm supplier, the harvest purchase orders workflow depends on harvest_purchase_orders_metro. Engineers report that harvest_purchase_orders_metro rows have statuses requiring a three-way risk category; the evidence is that a simple boolean expression sends null status to a high-risk category. They require that business rules distinguish active, cancelled and unknown statuses. The first acceptance run passed. The current task is to detect future regressions and changes over time. Which ongoing alert or metric is most relevant?

  1. Use when/otherwise with explicit conditions and an unknown default
  2. Treat null as an active subscription without evidence at National farm supplier
  3. Test all named states plus null and an unrecognized state
  4. Monitor unmapped statuses and rule-version changes for harvest_purchase_orders_metro

Explanation

Correct Answer

D:

Monitor unmapped statuses and rule-version changes for harvest_purchase_orders_metro creates recurring visibility into the failure mode (harvest_purchase_orders_metro rows have statuses requiring a three-way risk category). Unlike a single successful test, the measure can reveal drift, lag, or new failures after later source and deployment changes while business rules distinguish active, cancelled and unknown statuses.

Incorrect Answers

A:

Use when/otherwise with explicit conditions and an unknown default is a plausible lasting design once chosen, but it does not perform continuing operational detection at this stage. In the harvest_purchase_orders_metro scenario, the observed evidence is that a simple boolean expression sends null status to a high-risk category; the requirement remains: business rules distinguish active, cancelled and unknown statuses.

B:

Missing status cannot be assumed to mean active. The proposed action (Treat null as an active subscription without evidence at National farm supplier) does not meet the requirement that business rules distinguish active, cancelled and unknown statuses, nor does it constitute continuing operational detection.

C:

Test all named states plus null and an unrecognized state is a one-time acceptance check. It does not supply continuing operational detection for harvest_purchase_orders_metro; a passing test cannot substitute for the specific task now required.

Question 327

At Veterinary clinic association, the row deduplication keys workflow handles treatment billing events. The problem is that treatment_billing_events_west contains duplicate message IDs after file retries. Evidence: two rows share event_id but have different ingestion timestamps. Constraint: silver needs one deterministic event per business event identifier. The new approach is deployed. The current task is to prove correct output and authorized behavior, not just successful installation. Which test should pass before the new flow is accepted?

  1. Verify duplicate business keys and ordering fields within treatment_billing_events_west
  2. Pilot a dedup transform while retaining originals in bronze for audit
  3. Feed repeated IDs in different order and verify the selected canonical record
  4. DropDuplicates on every column when duplicates differ only by ingest timestamp at Veterinary clinic association

Explanation

Correct Answer

C:

Feed repeated IDs in different order and verify the selected canonical record directly tests the behavior that should change following the correction. With the observed evidence (two rows share event_id but have different ingestion timestamps), the acceptance result must demonstrate actual data or permission correctness, while retaining the requirement that silver needs one deterministic event per business event identifier.

Incorrect Answers

A:

Verify duplicate business keys and ordering fields within treatment_billing_events_west could clarify the original fault, but the available evidence already establishes its scope; it is not the post-change acceptance test now requested. The treatment_billing_events_west workflow still requires that silver needs one deterministic event per business event identifier.

B:

Pilot a dedup transform while retaining originals in bronze for audit may introduce a correction, but the question does not ask for installation or migration. A rollout alone cannot replace the post-change acceptance test, especially given the evidence that two rows share event_id but have different ingestion timestamps. Here, the relevant situation is: the row deduplication keys workflow handles treatment billing events. The problem is that….

D:

All-column comparison misses business-key duplicates. The proposed action (DropDuplicates on every column when duplicates differ only by ingest timestamp at Veterinary clinic association) does not meet the requirement that silver needs one deterministic event per business event identifier, nor does it constitute the post-change acceptance test.

Question 328

At Public water district, the Unity Catalog audit event workflow handles pipeline flow metrics. The problem is that pipeline_flow_metrics_west ownership team cannot explain who changed a sensitive table grant. Evidence: investigation lacks a query of account audit events around the change. Constraint: privilege changes require attributable evidence and retention. The failure and requirements have been diagnosed; the team must select the lasting pipeline or governance approach. What governed target implementation should the engineer design?

  1. Monitor privileged changes, log delivery and unexplained event gaps for pipeline_flow_metrics_west
  2. Use available UC audit logging and governed retention for administrative events
  3. Disable audit logs because granting privileges already requires admin at Public water district
  4. Identify relevant audit event source, principal, timestamp and target object for pipeline_flow_metrics_west

Explanation

Correct Answer

B:

Use available UC audit logging and governed retention for administrative events is the intended durable approach for pipeline_flow_metrics_west: it addresses the verified problem (pipeline_flow_metrics_west ownership team cannot explain who changed a sensitive table grant) while preserving the required behavior (privilege changes require attributable evidence and retention). A diagnostic or monitoring step alone would not create this target-state behavior.

Incorrect Answers

A:

Monitor privileged changes, log delivery and unexplained event gaps for pipeline_flow_metrics_west would help detect future recurrence, but metrics alone do not deliver the target approach. The pipeline_flow_metrics_west requirement is that privilege changes require attributable evidence and retention.

C:

Administrative permissions do not replace audit evidence. The proposed action (Disable audit logs because granting privileges already requires admin at Public water district) does not meet the requirement that privilege changes require attributable evidence and retention, nor does it constitute the target approach.

D:

Identify relevant audit event source, principal, timestamp and target object for pipeline_flow_metrics_west could clarify the original fault, but the available evidence already establishes its scope; it is not the target approach now requested. The pipeline_flow_metrics_west workflow still requires that privilege changes require attributable evidence and retention.

Question 329

At Online bicycle retailer, the product sales transactions workflow depends on product_sales_transactions_rural. Engineers report that product_sales_transactions_rural team schedules a SQL aggregation by opening a dashboard manually; the evidence is that history shows a query can run on SQL warehouse but has no job task. They require that the query must run automatically before downstream export. The target approach is approved. The current task is to introduce it safely with bounded scope and rollback. Which controlled implementation step is appropriate now?

  1. Trigger the job and verify SQL query result is available before export
  2. Use a Lakeflow SQL query task configured with suitable warehouse and dependencies
  3. Ask analysts to click Run on the query each morning at Online bicycle retailer
  4. Create the scheduled SQL task and bind it to the downstream export

Explanation

Correct Answer

D:

Create the scheduled SQL task and bind it to the downstream export provides a bounded way to introduce the approved solution into product_sales_transactions_rural and detect an early mismatch. The existing signal is history shows a query can run on SQL warehouse but has no job task; a staged change protects the service requirement (the query must run automatically before downstream export) and makes rollback practical.

Incorrect Answers

A:

Trigger the job and verify SQL query result is available before export is a one-time acceptance check. It does not supply the controlled implementation step for product_sales_transactions_rural; a passing test cannot substitute for the specific task now required.

B:

Use a Lakeflow SQL query task configured with suitable warehouse and dependencies is a plausible lasting design once chosen, but it does not perform the controlled implementation step at this stage. In the product_sales_transactions_rural scenario, the observed evidence is that history shows a query can run on SQL warehouse but has no job task; the requirement remains: the query must run automatically before downstream export.

C:

Manual invocation does not provide reliable orchestration. The proposed action (Ask analysts to click Run on the query each morning at Online bicycle retailer) does not meet the requirement that the query must run automatically before downstream export, nor does it constitute the controlled implementation step.

Question 330

At Food delivery franchise, the dispatch and delivery status workflow depends on dispatch_and_delivery_status_rural. Engineers report that a nightly load of dispatch_and_delivery_status_rural repeats files from yesterday and developers fear duplicate inserts; the evidence is that the same object-storage folder is scanned on each scheduled run. They require that only new source files should be appended without reprocessing prior paths. The target approach is approved. The current task is to introduce it safely with bounded scope and rollback. Which controlled implementation step is appropriate now?

  1. Schedule COPY INTO for dispatch_and_delivery_status_rural and test a retry after successful ingestion
  2. Run unconditional INSERT SELECT over the complete folder on every retry at Food delivery franchise
  3. Use incremental idempotent COPY INTO against the governed Delta target
  4. Rerun the command with unchanged files and verify row counts do not double

Explanation

Correct Answer

A:

Schedule COPY INTO for dispatch_and_delivery_status_rural and test a retry after successful ingestion provides a bounded way to introduce the approved solution into dispatch_and_delivery_status_rural and detect an early mismatch. The existing signal is the same object-storage folder is scanned on each scheduled run; a staged change protects the service requirement (only new source files should be appended without reprocessing prior paths) and makes rollback practical.

Incorrect Answers

B:

A blind append can duplicate previously processed records. The proposed action (Run unconditional INSERT SELECT over the complete folder on every retry at Food delivery franchise) does not meet the requirement that only new source files should be appended without reprocessing prior paths, nor does it constitute the controlled implementation step.

C:

Use incremental idempotent COPY INTO against the governed Delta target is a plausible lasting design once chosen, but it does not perform the controlled implementation step at this stage. In the dispatch_and_delivery_status_rural scenario, the observed evidence is that the same object-storage folder is scanned on each scheduled run; the requirement remains: only new source files should be appended without reprocessing prior paths.

D:

Rerun the command with unchanged files and verify row counts do not double is a one-time acceptance check. It does not supply the controlled implementation step for dispatch_and_delivery_status_rural; a passing test cannot substitute for the specific task now required.

Certified Data Engineer Associate Practice Tests