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Databricks Databricks-Certified-Data-Engineer-Professional exam dumps - Databricks Certified Data Engineer Professional Exam
- Exam Code: Databricks-Certified-Data-Engineer-Professional
- Exam Name: Databricks Certified Data Engineer Professional Exam
- Updated: Sep 12, 2026 Q & A: 250 Questions and Answers
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Databricks Databricks-Certified-Data-Engineer-Professional Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Databricks Lakehouse Platform Architecture | - Workspace and cluster architecture - Medallion architecture (Bronze, Silver, Gold) - Data governance concepts (Unity Catalog basics) |
| Production Pipelines and Orchestration | - Databricks Workflows - Job scheduling and monitoring - Error handling and recovery strategies |
| Data Modeling and Transformation | - Spark SQL transformations - Performance optimization techniques - Dimensional modeling concepts |
| Delta Lake and Data Management | - Delta Lake transactions and ACID properties - Schema evolution and enforcement - Time travel and versioning |
| Data Ingestion and Processing | - Batch and streaming ingestion with Auto Loader - ETL pipeline design patterns - Structured Streaming fundamentals |
Databricks Certified Data Engineer Professional Sample Questions:
Question #1
A query is taking too long to run. After investigating the Spark UI, the data engineer discovered a significant amount of disk spill. The compute instance being used has a core-to-memory ratio of
1:2. What are the two steps the data engineer should take to minimize spillage? (Choose two.)
- A. Reduce spark.sql.files.maxPartitionBytes.
- B. Choose a compute instance with a higher core-to-memory ratio.
- C. Increase spark.sql.files.maxPartitionBytes.
- D. Choose a compute instance with more disk space.
- E. Choose a compute instance with more network bandwidth.
Correct Answer: A,B 🗳️
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Question #2
A Delta Lake table representing metadata about content from user has the following schema:
user_id LONG, post_text STRING, post_id STRING, longitude FLOAT, latitude FLOAT, post_time TIMESTAMP, date DATE Based on the above schema, which column is a good candidate for partitioning the Delta Table?
- A. Date
- B. User_id
- C. Post_time
- D. latitude
- E. Post_id
Correct Answer: A 🗳️
Explanation: Only visible for FreeDumps members. You can sign-up / login (it's free).
Question #3
A table is registered with the following code:
Both users and orders are Delta Lake tables. Which statement describes the results of querying recent_orders?
- A. Results will be computed and cached when the table is defined; these cached results will incrementally update as new records are inserted into source tables.
- B. All logic will execute at query time and return the result of joining the valid versions of the source tables at the time the query finishes.
- C. All logic will execute at query time and return the result of joining the valid versions of the source tables at the time the query began.
- D. All logic will execute when the table is defined and store the result of joining tables to the DBFS; this stored data will be returned when the table is queried.
- E. The versions of each source table will be stored in the table transaction log; query results will be saved to DBFS with each query.
Correct Answer: D 🗳️
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Question #4
A Data Engineer is building a simple data pipeline using Lakeflow Declarative Pipelines (LDP) in Databricks to ingest customer data. The raw customer data is stored in a cloud storage location in JSON format. The task is to create Lakeflow Declarative Pipelines that read the raw JSON data and write it into a Delta table for further processing. Which code snippet will correctly ingest the raw JSON data and create a Delta table using LDP?
- A. import dlt
@dlt.table
def raw_customers():
return spark.read.json("s3://my-bucket/raw-customers/") - B. import dlt
@dlt.table
def raw_customers():
return spark.read.format("csv").load("s3://my-bucket/raw-customers/") - C. import dlt
@dlt.table
def raw_customers():
return spark.read.format("parquet").load("s3://my-bucket/raw-customers/") - D. import dlt
@dlt.view
def raw_customers():
return spark.format.json("s3://my-bucket/raw-customers/")
Correct Answer: A 🗳️
Explanation: Only visible for FreeDumps members. You can sign-up / login (it's free).
Question #5
A data engineer is designing a pipeline in Databricks that processes records from a Kafka stream where late-arriving data is common. Which approach should the data engineer use?
- A. Use batch processing and overwrite the entire output table each time to ensure late data is incorporated correctly.
- B. Use a watermark to specify the allowed lateness to accommodate records that arrive after their expected window, ensuring correct aggregation and state management.
- C. Use an Auto CDC pipeline with batch tables to simplify late data handling.
- D. Implement a custom solution using Databricks Jobs to periodically reprocess all historical data.
Correct Answer: B 🗳️
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