Databricks Certified-Data-Engineer-Professional : Databricks Certified Data Engineer Professional

  • Exam Code: Certified-Data-Engineer-Professional
  • Exam Name: Databricks Certified Data Engineer Professional
  • Updated: Oct 09, 2026
  • Q & A: 250 Questions and Answers

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

SectionObjectives
Topic 1: Data Sharing and Federation- Lakehouse Federation
  • 1. Configure Lakehouse Federation with appropriate governance
    - Delta Sharing
    • 1. Configure Databricks-to-Databricks Sharing
      • 2. Share live Lakehouse data with external computing platforms
        • 3. Configure sharing with external platforms using the open sharing protocol
          Topic 2: Developing Code for Data Processing using Python and SQL- Using Python and Tools for Development
          • 1. Develop User-Defined Functions using Pandas/Python UDFs
            • 2. Manage and troubleshoot third-party library installations and dependencies
              • 3. Design and implement scalable Python project structures optimized for Databricks Asset Bundles
                - Building and Testing ETL Pipelines
                • 1. Develop unit and integration tests for data processing code
                  • 2. Compare Spark Structured Streaming and Lakeflow Spark Declarative Pipelines
                    • 3. Create and automate ETL workloads using Jobs through UI, APIs, and CLI
                      • 4. Use APPLY CHANGES APIs for change data capture
                        • 5. Compare streaming tables and materialized views
                          • 6. Build production-ready batch and streaming pipelines using Lakeflow Spark Declarative Pipelines and Auto Loader
                            • 7. Configure environments, dependencies, memory, and retry behavior
                              • 8. Use control flow operators in pipeline components
                                Topic 3: Debugging and Deploying- Deploying CI/CD
                                • 1. Build and deploy Databricks resources using Databricks Asset Bundles
                                  • 2. Integrate Git-based CI/CD workflows using Databricks Git Folders
                                    - Debugging and Troubleshooting
                                    • 1. Analyze errors and remediate failed job runs
                                      • 2. Use Lakeflow Spark Declarative Pipelines event logs and Spark UI for debugging
                                        • 3. Use Spark UI, cluster logs, system tables, and query profiles for diagnostics
                                          Topic 4: Ensuring Data Security and Compliance- Compliance
                                          • 1. Develop data purging solutions according to data retention policies
                                            • 2. Implement pipelines that detect and mask personally identifiable information
                                              - Data Security
                                              • 1. Apply anonymization and pseudonymization techniques
                                                • 2. Use row filters and column masks for sensitive data
                                                  • 3. Use ACLs to secure workspace objects and enforce least privilege
                                                    Topic 5: Cost & Performance Optimisation- Cost Optimization
                                                    • 1. Understand how Unity Catalog managed tables reduce operational overhead
                                                      - Delta Optimization
                                                      • 1. Apply data skipping and file pruning techniques
                                                        • 2. Use Change Data Feed to address streaming table limitations and improve latency
                                                          • 3. Understand deletion vectors and liquid clustering
                                                            - Query Performance
                                                            • 1. Use Query Profile to identify performance bottlenecks
                                                              • 2. Identify inefficient joins and excessive data shuffling
                                                                Topic 6: Data Modelling- Scalable Data Models
                                                                • 1. Design and implement scalable data models using Delta Lake
                                                                  • 2. Understand Liquid Clustering versus partitioning and Z-Ordering
                                                                    • 3. Optimize data layout using Liquid Clustering
                                                                      - Dimensional Modelling
                                                                      • 1. Design dimensional models for analytical workloads
                                                                        Topic 7: Monitoring and Alerting- Monitoring
                                                                        • 1. Use system tables for resource, cost, audit, and workload monitoring
                                                                          • 2. Use Query Profiler and Spark UI to monitor workloads
                                                                            • 3. Use Lakeflow Spark Declarative Pipelines event logs for monitoring
                                                                              • 4. Use Databricks REST APIs and CLI for monitoring jobs and pipelines
                                                                                - Alerting
                                                                                • 1. Use SQL Alerts for data quality monitoring
                                                                                  • 2. Configure Lakeflow Jobs notifications for job status and performance issues
                                                                                    Topic 8: Data Governance- Unity Catalog Permissions
                                                                                    • 1. Understand the Unity Catalog permission inheritance model
                                                                                      - Metadata and Discoverability
                                                                                      • 1. Create and maintain descriptions and metadata for enterprise data
                                                                                        Topic 9: Data Transformation, Cleansing, and Quality- Data Quality
                                                                                        • 1. Develop data quarantining processes for invalid data
                                                                                          • 2. Apply data quality controls using Lakeflow Spark Declarative Pipelines or Auto Loader
                                                                                            - Advanced Data Transformation
                                                                                            • 1. Write efficient Spark SQL and PySpark transformations
                                                                                              • 2. Apply window functions, joins, and aggregations to large datasets
                                                                                                Topic 10: Data Ingestion & Acquisition- Design and implement data ingestion pipelines
                                                                                                • 1. Ingest Delta Lake, Parquet, ORC, Avro, JSON, CSV, XML, Text, and Binary data
                                                                                                  • 2. Build append-only pipelines for batch and streaming data using Delta
                                                                                                    • 3. Ingest data from message buses and cloud storage

                                                                                                      Databricks Certified Data Engineer Professional Sample Questions:

                                                                                                      Question #1

                                                                                                      A data engineer wants to ingest a large collection of image files (JPEG and PNG) from cloud object storage into a Unity Catalog-managed table for analysis and visualization. Which two configurations and practices are recommended to incrementally ingest these images into the table? (Choose two.)

                                                                                                      • A. Use Auto Loader and set cloudFiles.format to "IMAGE".
                                                                                                      • B. Use Auto Loader and set cloudFiles.format to "BINARYFILE".
                                                                                                      • C. Use Auto Loader and set cloudFiles.format to "TEXT".
                                                                                                      • D. Use the pathGlobFilter option to select only image files (e.g., "*.jpg,*.png").
                                                                                                      • E. Move files to a volume and read with SQL editor.
                                                                                                      Reveal Solution  Discussion  0

                                                                                                      Correct Answer: B,D  🗳️

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                                                                                                      Question #2

                                                                                                      An upstream system has been configured to pass the date for a given batch of data to the Databricks Jobs API as a parameter. The notebook to be scheduled will use this parameter to load data with the following code:
                                                                                                      df = spark.read.format("parquet").load(f"/mnt/source/(date)")
                                                                                                      Which code block should be used to create the date Python variable used in the above code block?

                                                                                                      • A. import sys
                                                                                                        date = sys.argv[1]
                                                                                                      • B. date = spark.conf.get("date")
                                                                                                      • C. dbutils.widgets.text("date", "null")
                                                                                                        date = dbutils.widgets.get("date")
                                                                                                      • D. date = dbutils.notebooks.getParam("date")
                                                                                                      • E. input_dict = input()
                                                                                                        date= input_dict["date"]
                                                                                                      Reveal Solution  Discussion  0

                                                                                                      Correct Answer: C  🗳️

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                                                                                                      Question #3

                                                                                                      A data engineer is analyzing a large, partitioned retail dataset in Databricks, where each row represents a sale made by a salesperson. The dataset contains millions of records with the following schema:
                                                                                                      sales_df: [salesperson_id: string, region: string, sale_amount: double, sale_date: date] The data engineer needs to generate a DataFrame that ranks salespeople within each region based on their total cumulative sales, with the highest seller ranked as 1. If multiple salespeople have the same total sales, they should share the same rank.
                                                                                                      The data engineer wants to implement this logic using a PySpark window function and the dense_rank () function.
                                                                                                      Which code snippet will perform this ranking?

                                                                                                      • A.
                                                                                                      • B.
                                                                                                      • C.
                                                                                                      • D.
                                                                                                      Reveal Solution  Discussion  0

                                                                                                      Correct Answer: D  🗳️

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                                                                                                      Question #4

                                                                                                      The Databricks workspace administrator has configured interactive clusters for each of the data engineering groups. To control costs, clusters are set to terminate after 30 minutes of inactivity.
                                                                                                      Each user should be able to execute workloads against their assigned clusters at any time of the day.
                                                                                                      Assuming users have been added to a workspace but not granted any permissions, which of the following describes the minimal permissions a user would need to start and attach to an already configured cluster.

                                                                                                      • A. Cluster creation allowed. "Can Attach To" privileges on the required cluster
                                                                                                      • B. Cluster creation allowed. "Can Restart" privileges on the required cluster
                                                                                                      • C. "Can Restart" privileges on the required cluster
                                                                                                      • D. Workspace Admin privileges, cluster creation allowed. "Can Attach To" privileges on the required cluster
                                                                                                      • E. "Can Manage" privileges on the required cluster
                                                                                                      Reveal Solution  Discussion  0

                                                                                                      Correct Answer: C  🗳️

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                                                                                                      Question #5

                                                                                                      A data architect is designing a Databricks solution to efficiently process data for different business requirements. In which scenario should a data engineer use a materialized view compared to a streaming table?

                                                                                                      • A. Implementing a CDC (Change Data Capture) pipeline that needs to detect and respond to database changes within seconds.
                                                                                                      • B. Processing high-volume, continuous clickstream data from a website to monitor user behavior in real-time.
                                                                                                      • C. Ingesting data from Apache Kafka topics with sub-second processing requirements for immediate alerting.
                                                                                                      • D. Precomputing complex aggregations and joins from multiple large tables to accelerate BI dashboard performance.
                                                                                                      Reveal Solution  Discussion  0

                                                                                                      Correct Answer: D  🗳️

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