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Cloudera CDP Data Engineer - Certification Sample Questions:

1. What is the primary purpose of using Cloudera's API in a data engineering context?

A) To increase the time it takes to deploy applications.
B) To manually configure and start cluster services.
C) To bypass security configurations for rapid development.
D) To automate the provisioning, configuration, and scaling of clusters.

2. You're building an Airflow DAG that involves multiple data processing tasks. How can you handle task dependencies and ensure the tasks execute in the correct order?

A) Leverage XCom to share data between tasks and define dependencies based on the data availability.
B) Use the Airflow UI to visually connect the tasks with arrows, indicating their execution order.
C) Define the tasks directly within the DAG code using Python operators and set their dependencies manually.
D) All of the above

3. What is the recommended way to handle dependencies between data quality checks in Apache Airflow to ensure that checks are performed in a specific sequence?

A) Use the depends_on_past parameter in each data quality check task.
B) Explicitly set task dependencies using the set_upstream or set_downstream methods.
C) Implement each data quality check as a separate DAG.
D) Use the SequentialExecutor for the Airflow environment.

4. When configuring a Hive table with bucketing, how does the choice of the bucketing column(s) influence query performance?

A) The choice of bucketing column(s) has no impact on performance as long as the number of buckets is optimally chosen.
B) Selecting highly unique or skewed columns for bucketing can lead to uneven data distribution and potential performance bottlenecks.
C) The bucketing column(s) should be chosen randomly to ensure a uniform distribution of data across buckets.
D) Bucketing on columns that are frequently updated optimizes data modification operations and query performance.

5. In Apache Spark, which storage level is recommended for caching data that is accessed frequently but is too large to fit in memory?

A) MEMORY ONLY
B) OFF HEAP
C) MEMORY AND DISK
D) DISK ONLY

Solutions: