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Databricks Databricks-Certified-Data-Engineer-Professional - Databricks Certified Data Engineer Professional Exam

Updated: Nov 09, 2026

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  • Exam Code: Databricks-Certified-Data-Engineer-Professional
  • Exam Name: Databricks Certified Data Engineer Professional Exam

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

SectionWeightObjectives
Topic 1: Data Ingestion & Acquisition7%- Handle incremental and batch data loads
- Ingest data from diverse sources
- Use Auto Loader and structured streaming
Topic 2: Debugging and Deploying10%- Implement CI/CD and DevOps practices
- Troubleshoot and debug pipelines
- Deploy using Asset Bundles, CLI, and APIs
Topic 3: Developing Code for Data Processing using Python and SQL22%- Implement complex data processing logic
- Write efficient and maintainable code
- Use Databricks-specific libraries and APIs
Topic 4: Data Modelling6%- Design Medallion Architecture
- Optimize table design and partitioning
- Implement dimensional and relational models
Topic 5: Monitoring and Alerting10%- Monitor pipeline performance and health
- Track data lineage and metrics
- Set up alerts and notifications
Topic 6: Data Sharing and Federation5%- Implement Lakehouse Federation
- Use Delta Sharing for secure data sharing
- Manage cross-platform data access
Topic 7: Data Transformation, Cleansing, and Quality10%- Implement schema evolution and management
- Apply data cleansing and validation rules
- Enforce data quality standards
Topic 8: Cost & Performance Optimisation13%- Apply cost management best practices
- Optimize compute and storage resources
- Improve query and pipeline performance
Topic 9: Ensuring Data Security and Compliance10%- Secure data at rest and in transit
- Ensure data privacy and compliance
- Implement access control and permissions
Topic 10: Data Governance7%- Enforce data policies and standards
- Use Unity Catalog for governance
- Manage data assets and metadata

Databricks Certified Data Engineer Professional Sample Questions:

Question #1

A data engineering team needs to create a SQL Alert that monitors data quality across multiple columns in their customer table. They want to trigger an alert when both the percentage of customers with missing email addresses exceeds 15% AND the percentage of customers with invalid phone number formats exceeds 10%. Which SQL query pattern is appropriate for implementing this multi-column alert condition?

  • A. SELECT COUNT (*) FROM customers WHERE email IS NULL OR phone_format_invalid = true
  • B. SELECT email_null_pct, phone_invalid_pct FROM (SELECT (COUNT(CASE WHEN email IS NULL THEN 1 END) *
    100.0/COUNT (*)) as email_null_pct, (COUNT(CASE WHEN phone NOT RLIKE ''[0-9-+()\\s]+$' THEN 1 END)*
    100.0/COUNT (*)) as phone_invalid_pct FROM customers)
  • C. SELECT email, phone FROM customers WHERE email IS NULL AND phone NOT RLIKE ''[0-9-
    +()\\s]+$'
  • D. SELECT CASE WHEN email_null_pct >15 AND phone_invalid_pct> 10 THEN 1 ELSE 0 END FROM (SELECT (COUNT (CASE WHEN email IS NULL THEN 1 END) * 100.0 / COUNT (*)) as phone_invalid_pct FROM customers) metrics
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

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Question #2

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. Workspace Admin privileges, cluster creation allowed. "Can Attach To" privileges on the required cluster
  • C. "Can Restart" privileges on the required cluster
  • D. Cluster creation allowed. "Can Restart" 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 #3

A data engineer is testing a collection of mathematical functions, one of which calculates the area under a curve as described by another function.
assert(myIntegrate(lambda x: x*x, 0, 3) [0] == 9)
Which kind of the test does the above line exemplify?

  • A. Integration
  • B. functional
  • C. Manual
  • D. Unit
  • E. End-to-end
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

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Question #4

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 #5

Which statement describes Delta Lake Auto Compaction?

  • A. An asynchronous job runs after the write completes to detect if files could be further compacted; if yes, an optimize job is executed toward a default of 1 GB.
  • B. Data is queued in a messaging bus instead of committing data directly to memory; all data is committed from the messaging bus in one batch once the job is complete.
  • C. An asynchronous job runs after the write completes to detect if files could be further compacted; if yes, an optimize job is executed toward a default of 128 MB.
  • D. Before a Jobs cluster terminates, optimize is executed on all tables modified during the most recent job.
  • E. Optimized writes use logical partitions instead of directory partitions; because partition boundaries are only represented in metadata, fewer small files are written.
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

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