What advanced technique can be used in Hive to optimize queries on bucketed tables by skipping unnecessary data?

• A.Data encryption at the bucket level
• B.Bucket pruning based on query predicates
• C.Increasing the replication factor of bucketed data
• D.Manually specifying the buckets to scan during query execution

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In the context of Cloudera's SQL engines, what does the presence of a "Broadcast Hash Join" in an Explain Plan suggest about query performance?

• A.It indicates an optimal use of network resources
• B.It suggests that the join operation might be a performance bottleneck for large datasets
• C.It means that the query will execute faster than with any other join method
• D.It implies that no indexing is used in the join operation

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

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

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How can you implement a data quality check in Apache Airflow that verifies the row count of a table does not decrease from the previous DAG run?

• A.Utilize the PreviousDagRunSensor with a custom Python function for comparison.
• B.Store the row count from the previous run in Airflow Variables and compare it using a Pythonoperator.
• C.Use the BranchPythonOperator to branch the workflow based on the row count comparison logic.
• D.Implement a custom SqlSensor that checks the row count against a stored value in XComs.

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Your Airflow DAG involves sending notifications upon successful completion of the entire pipeline. How can you achieve this functionality?

• A.Implement a custom notification script within the final task of the DAG.
• B.Use the Email Operator to send an email notification upon successful DAG run completion.
• C.Configure the Airflow web UI to send alerts based on DAG run status.
• D.Utilize Airflow variables to store notification details and access them within the final task.

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