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Cloudera CDP-3002 Exam Syllabus Topics:

Cloudera CDP Data Engineer - Certification Sample Questions:

1. When analyzing an Explain Plan, what does the presence of a large number of "Nested Loop Joins" indicate about a query's potential performance?

A) It implies that the data is perfectly partitioned for the query
B) It guarantees optimal performance for all dataset sizes
C) It suggests that the query is fully optimized for distributed execution
D) It may indicate potential performance issues for large datasets due to the high computational cost

2. In the context of Airflow, what is the purpose of the "XCom" feature?

A) To execute commands across different operating systems.
B) To enable communication between different tasks within the same DAG.
C) To trigger external systems when a DAG reaches a specific state.
D) To manage dependencies and package installations across tasks.

3. In Apache Airflow, what is the purpose of setting max_active_runs in a DAG's configuration?

A) To determine the maximum number of DAG files that can be parsed at any given time.
B) To limit the number of task instances that can run concurrently within the DAG.
C) To control the number of retries for a failed task.
D) To specify the maximum number of DAG runs that can be executed in parallel.

4. How can "Explain Plan" help in optimizing query performance regarding data partitioning?

A) By showing the number of partitions created on the fly
B) By revealing the encryption method used for partitioned data
C) By displaying the total size of all partitions
D) By indicating whether the query is able to take advantage of partition pruning

5. Why are partitioned tables beneficial in Hive for large datasets?

A) They automatically encrypt data based on the partition key.
B) They allow for faster query processing by scanning only relevant partitions.
C) They decrease the security of the data.
D) They ensure that all data is stored in a single file, simplifying access.

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