Question 1

What is the purpose of the retry parameter in an Apache Airflow DAG task?

Options :

A : To determine task dependencies

B : To control the number of retries after a failure

C : To manage task scheduling

D : To define the task-s execution time

Answer: B

Question 2

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 3

Which Kubernetes resource is most commonly used to deploy a Spark application in a Cloudera environment?

Options :

A : Deployment

B : Pod

C : SparkApplication

D : ConfigMap

Answer: C

Question 4

How does partition pruning enhance query performance in a Cloudera environment?

Options :

A : By compressing data partitions

B : By merging partitions

C : By limiting the number of partitions scanned

D : By creating additional partitions

Answer: C

Question 5

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