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Cloudera CDP Data Engineer - Certification Sample Questions:

1. You need to create a new Hive table from a Spark DataFrame. What are the different approaches you can consider?

A) Use the DataFrame.write.saveAsTable("table_name") method with appropriate options
B) All of the above
C) Directly write the DataFrame to a directory in HDFS and define a corresponding Hive table schema
D) Convert the DataFrame to a temporary table and then use HiveQL commands to create a permanent table

2. When deploying a Spark application in Kubernetes, what is the purpose of specifying the '-conf spark.kubernetes.driver.pod.name=spark-driver-pod' in the 'spark-submit' command?

A) To specify the name of the Spark Driver pod.
B) To define the Docker image for the Driver pod.
C) To assign a specific node for the Driver pod.
D) To name the Executor pods.

3. For improving join performance, why is it recommended to filter data before joining tables in Apache Spark?

A) To enforce strict data typing across joined datasets
B) To reduce the volume of data processed during the join
C) To prepare data for broadcast joins irrespective of size
D) To increase the amount of data being shuffled

4. In a PySpark application running on Kubernetes, you want to enable dynamic allocation of Executors. Which configuration setting is essential to turn on this feature?

A) 'spark.dynamicAllocation.enabled'
B) 'spark.executor.instances'
C) 'spark.kubernetes.executor.dynamicAllocation'
D) 'spark.kubernetes.dynamicAllocation.enabled'

5. Your Airflow DAG involves tasks that require access to specific resources like databases or external services. How can you ensure these resources are available and properly configured for the DAG execution?

A) Grant everyone access to all resources to avoid potential configuration issues.
B) Implement custom logic within each task to dynamically discover and connect to resources.
C) Hardcode connection details (credentials, URLs) directly within the DAG code.
D) Utilize Airflow connections to store and manage resource details securely.

Solutions: