Databricks-Certified-Data-Engineer-Professional exam dumps

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  • Exam Code: Databricks-Certified-Data-Engineer-Professional
  • Exam Name: Databricks Certified Data Engineer Professional Exam
  • No. of Questions: 250 Questions and Answers
  • Updated: Oct 28, 2026

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Databricks Databricks-Certified-Data-Engineer-Professional Exam Syllabus Topics:

SectionObjectives
Production Pipelines and Orchestration- Job scheduling and monitoring
- Databricks Workflows
- Error handling and recovery strategies
Delta Lake and Data Management- Delta Lake transactions and ACID properties
- Time travel and versioning
- Schema evolution and enforcement
Databricks Lakehouse Platform Architecture- Medallion architecture (Bronze, Silver, Gold)
- Data governance concepts (Unity Catalog basics)
- Workspace and cluster architecture
Data Ingestion and Processing- Structured Streaming fundamentals
- ETL pipeline design patterns
- Batch and streaming ingestion with Auto Loader
Data Modeling and Transformation- Spark SQL transformations
- Performance optimization techniques
- Dimensional modeling concepts

Databricks Certified Data Engineer Professional Sample Questions:

An organization processes customer data from web and mobile applications. Data includes names, emails, phone numbers, and location history. Data arrives both as batch files (from SFTP daily) and streaming JSON events (from Kafka in real-time).
To comply with data privacy policies, the following requirements must be met:
- Personally Identifiable Information (PII) such as email, phone
number, and IP address must be masked or anonymized before storage.
- Both batch and streaming pipelines must apply consistent PII
handling.
- Masking logic must be auditable and reproducible.
- The masked data must remain usable for downstream analytics.
How should the data engineer design a compliant data pipeline on Databricks that supports both batch and streaming modes, applies data masking to PII, and maintains traceability for audits?

  • A. Load batch data with notebooks and ingest streaming data with SQL Warehouses; use Unity Catalog column masks on Silver tables to redact fields after storage.
  • B. Allow PII to be stored unmasked in Bronze for lineage tracking, then apply masking logic in Gold tables used for reporting.
  • C. Use Lakeflow Declarative Pipelines for batch and streaming ingestion, define a PII masking function, and apply it during Bronze ingestion before writing to Delta Lake.
  • D. Ingest both batch and streaming data using Lakeflow Declarative Pipelines, and apply masking via Unity Catalog column masks at read time to avoid modifying the data during ingestion.
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Explanation: Only visible for ExamcollectionPass members. You can sign-up / login (it's free).

A data engineer is attempting to execute the following PySpark code:
df = spark.read.table("sales")
result = df.groupBy("region").agg(sum("revenue"))
However, upon inspecting the execution plan and profiling the Spark job, they observe excessive data shuffling during the aggregation phase.
Which technique should be applied to reduce shuffling during the groupBy aggregation operation?

  • A. Use coalesce() after the aggregation.
  • B. Use broadcast join.
  • C. Repartition by region before aggregation.
  • D. Caching the DataFrame df.
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Explanation: Only visible for ExamcollectionPass members. You can sign-up / login (it's free).

Which of the following is true of Delta Lake and the Lakehouse?

  • A. Views in the Lakehouse maintain a valid cache of the most recent versions of source tables at all times.
  • B. Z-order can only be applied to numeric values stored in Delta Lake tables
  • C. Primary and foreign key constraints can be leveraged to ensure duplicate values are never entered into a dimension table.
  • D. Because Parquet compresses data row by row. strings will only be compressed when a character is repeated multiple times.
  • E. Delta Lake automatically collects statistics on the first 32 columns of each table which are leveraged in data skipping based on query filters.
Reveal Solution  Discussion  0

Correct Answer: E  🗳️

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A new data engineer notices that a critical field was omitted from an application that writes its Kafka source to Delta Lake. This happened even though the critical field was in the Kafka source.
That field was further missing from data written to dependent, long-term storage. The retention threshold on the Kafka service is seven days. The pipeline has been in production for three months.
Which describes how Delta Lake can help to avoid data loss of this nature in the future?

  • A. Delta Lake automatically checks that all fields present in the source data are included in the ingestion layer.
  • B. Data can never be permanently dropped or deleted from Delta Lake, so data loss is not possible under any circumstance.
  • C. Delta Lake schema evolution can retroactively calculate the correct value for newly added fields, as long as the data was in the original source.
  • D. The Delta log and Structured Streaming checkpoints record the full history of the Kafka producer.
  • E. Ingestine all raw data and metadata from Kafka to a bronze Delta table creates a permanent, replayable history of the data state.
Reveal Solution  Discussion  0

Correct Answer: E  🗳️

Explanation: Only visible for ExamcollectionPass members. You can sign-up / login (it's free).

Assuming that the Databricks CLI has been installed and configured correctly, which Databricks CLI command can be used to upload a custom Python Wheel to object storage mounted with the DBFS for use with a production job?

  • A. fs
  • B. jobs
  • C. configure
  • D. libraries
  • E. workspace
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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