Question 1

Which method allows you to debug a DAG in Apache Airflow?

Options :

A : By using the Airflow CLI

B : By restarting the Airflow server

C : By checking the Airflow Web UI logs

D : By editing the DAG file directly

Answer: C

Question 2

What is the best approach to implement incremental extraction in Apache Airflow?

Options :

A : Use a hash column in source table

B : Use a last_modified column in source table

C : Use a start_date parameter in DAG

D : Use a unique key in source table

Answer: B

Question 3

In Cloudera, which method is most effective for caching data that is used across multiple joins in a single query?

Options :

A : Temporary tables

B : Query results cache

C : Subqueries

D : Materialized views

Answer: D

Question 4

What configuration is essential for optimizing Spark performance on Kubernetes?

Options :

A : Kubernetes resource limits

B : Spark shuffle partitions

C : Spark application log levels

D : Kubernetes networking settings

Answer: A

Question 5

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

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