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Databricks Certified Data Engineer Professional Exam Questions & Answers

Practice 12 free Databricks Certified Data Engineer Professional exam questions with answers and community-discussed explanations. Each question has its own page where you can reveal the correct answer and debate it in the comments.

All 12 questions

  1. Q1 The data engineering team maintains the following join logic between three Delta tables:df_students = spark.table("students")df_courses = spark.table("courses")df_enrollments = spark.table("enrollments") df_join_1 = (df_students.join(df_enrollments, df_students.student_id…
  2. Q2 A junior data engineer is using the following code to de-duplicate raw streaming data and insert them in a target Delta tablespark.readStream…
  3. Q3 A data engineer has a MLFlow model logged in a given “model_url”. They have registered the model as a Spark UDF using…
  4. Q4 Which of the following describes the minimal permissions a data engineer needs to start and terminate an existing cluster ?
  5. Q5 A data engineer has a Delta Lake table named ‘orders_archive’ created using the following command:CREATE TABLE orders_archiveDEEP CLONE ordersThey want to sync…
  6. Q6 The data engineering team has a pipeline that ingest Kafka source data into a Multiplex bronze table. This Delta table is partitioned…
  7. Q7 A data engineer is using the following spark configurations in a pipeline to enable Optimized Writes and Auto Compaction:spark.conf.set("spark.databricks.delta.optimizeWrite.enabled", True)spark.conf.set("spark.databricks.delta.autoCompact.enabled", True)They also…
  8. Q8 The data engineering team has the following query for processing customers’ requests to be forgotten:DELETE FROM customersWHERE customer_id IN(SELECT customer_id FROM delete_requests)Which…
  9. Q9 A data engineer has added a CHECK constraint to the sales table using the following command:ALTER TABLE sales ADD CONSTRAINT valid_date CHECK…
  10. Q10 Which of the following statements correctly describes End-to-End Testing ?
  11. Q11 A data engineer uses the following SQL query:GRANT USAGE ON DATABASE sales_db TO finance_teamWhich of the following is the benefit of the…
  12. Q12 Which of the following statements correctly describes Unit Testing ?

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