Question 1

What is the role of TaskInstance in Apache Airflow when working with DAGs?

Options :

A : It represents a single run of a task

B : It defines task dependencies

C : It manages the DAG-s overall execution

D : It schedules the execution of tasks

Answer: A

Question 2

What is the role of spark.sql.parquet.columnar in schema management?

Options :

A : It sets the maximum size of Parquet files

B : It controls the use of columnar storage for Parquet files

C : It specifies the schema format for Parquet files

D : It defines the number of partitions for Parquet files

Answer: B

Question 3

What role does data partitioning play in improving join performance in Cloudera?

Options :

A : Increases data redundancy

B : Ensures data is evenly distributed

C : Decreases query complexity

D : Reduces network latency

Answer: B

Question 4

What is the role of spark.sql.parquet.columnar in schema management?

Options :

A : It sets the maximum size of Parquet files

B : It controls the use of columnar storage for Parquet files

C : It specifies the schema format for Parquet files

D : It defines the number of partitions for Parquet files

Answer: B

Question 5

Which tool in Cloudera is used for scheduling and managing data pipelines?

Options :

A : Cloudera Navigator

B : Apache Airflow

C : Cloudera Data Science Workbench

D : Apache Impala

Answer: B

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