Cloudera Cloudera Certification CDP-3002

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Cloudera CDP Data Engineer - Certification Sample Questions:

1. You're working with a large dataset that needs to be partitioned and processed in chunks to improve efficiency. How can you achieve this using Airflow operators?

A) Configure the source system to provide the data pre-partitioned for efficient processing.
B) Leverage the File transform operator to partition the data based on specific criteria within the operator itself.
C) Use the Split Operator to divide the data into smaller subsets and chain them with downstream processing tasks.
D) Implement a custom Python script to handle partitioning and then use the BashOperator to execute the script within the DAG.

2. You are developing a PySpark application that processes a large dataset. Your application involves a transformation that requires shuffling data across the Executors. Which of the following responsibilities of the Spark Driver is most directly involved in this process?

A) Managing the lifecycle of Executor pods in Kubernetes.
B) Interpreting the user application and creating an execution plan.
C) Managing the shuffling and aggregation of data across Executors.
D) Monitoring the progress and status of tasks on the Executors.

3. In the context of packaging a PySpark application, what is the purpose of the 'requirements.txt' file?

A) To list all the third-party dependencies required by the application.
B) To list the environment variables needed for the application.
C) To define the Spark version compatible with the application.
D) To specify the Python version required for the application.

4. In the context of Spark SQL, what does the Catalyst optimizer use to optimize queries?

A) Machine learning algorithms to predict the fastest query execution plan
B) A rule-based optimization model that applies predefined rules to simplify queries
C) A cost-based optimization model that considers the size of intermediate data

5. What information does an "Explain Plan" typically provide in the context of SQL query optimization?

A) The cost of the query in monetary terms
B) The names of users who have executed the query
C) The expected time of query completion
D) The sequence of operations the database will perform to execute the query

Solutions: