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Cloudera CDP Data Engineer - Certification Sample Questions:

1. When monitoring a PySpark application in Kubernetes, you notice that Executor pods are frequently restarting. What is the most likely cause of this issue?

A) Dynamic resource allocation is disabled.
B) Too many tasks assigned to each Executor.
C) Insufficient memory allocation for Executor pods.
D) Executor pods are not configured to restart upon failure.

2. How do bucketed tables in Hive improve query performance?

A) By compressing data automatically to reduce storage space
B) By organizing data into fixed-size segments, or buckets, based on a hash function of a column
C) By encrypting data to reduce 1/0 operations
D) By replicating data across multiple nodes to improve access speed

3. What is the role of an Operator in an Apache Airflow DAG?
A To schedule DAG runs based on time or external triggers

A) To represent a single task or a step within a DAG
B) To store metadata and logs for tasks and DAGs
C) To monitor the execution of DAGs and provide notifications

4. Which of the following is TRUE about using Explain Plans for performance tuning?

A) They are only useful for queries that involve joins
B) They provide detailed network latency information
C) They can help identify operations that may become performance bottlenecks
D) Explain Plans always show the actual runtime of a query

5. Your team is deploying a Spark application on a Kubernetes cluster. To ensure high availability, you need to decide how many executor instances to configure. Which of the following configurations in your PySpark application would correctly set the number of executor instances?

A)

B)

C)

D)

Solutions: