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Cloudera CDP-3002 Exam Syllabus Topics:

Cloudera CDP Data Engineer - Certification Sample Questions:

Question 1

In an Airflow DAG, you have tasks A, B, C, and D. Task A must complete before B and C can start, but B and C can run in parallel. Task D should only run once both B and C have completed. How do you set up these dependencies?

A. A]] B, C]] D
B. A.set_downstream([B, C]) and set_upstream([B, C])
C. A]] B ]] C]] D
D. [A ]] B, A]] C] and [B, C] ]] D

Question 2

You need to filter a Spark DataFrame based on multiple conditions. How can you achieve this efficiently and concisely?

A. Implement custom filtering logic using loops and conditional statements
B. Leverage chained filter() calls with logical operators like AND and OR
C. Use Spark SQL's WHERE clause with a complex expression
D. Use multiple filter() calls with individual conditions

Question 3

Your Spark application encounters frequent failures during the execution of a specific stage. How can you utilize Spark's persistence mechanisms to improve the application's fault tolerance?

A. Implement custom retry logic within the failing stage
B. Leverage Spark's checkpointing functionality to save application state periodically
C. Increase the number of Spark executors to handle potential resource limitations
D. Persist the RDDs used in the failing stage with MEMORY_ONLY storage level

Question 4

Your Spark application on Kubernetes requires a secure connection to a database. You've stored the database password in Kubernetes Secrets. How would you typically access this secret in your PySpark application?

A. By querying the Kubernetes API
B. By using a ConfigMap
C. Through an external secrets manager
D. By reading the secret file from a volume mount

Question 5

Your Airflow DAG involves sending notifications upon successful or failed task executions. How can you implement this functionality?

A. Configure the Airflow web Ul to send alerts based on task execution status.
B. Implement custom logic within each task to send notifications using external libraries.
C. Use the EmailOperator to send email notifications with details about the task status.
D. Utilize Airflow variables to store notification details and access them within tasks.

Solutions: