Question 1

How does HDFS ensure data reliability and fault tolerance?

Options :

A : By using data replication

B : By using a single storage node

C : By using data encryption

D : By using periodic backups

Answer: A

Question 2

How do you format a date to 'YYYY-MM-DD' in Impala?

Options :

A : TO_DATE

B : DATE_FORMAT

C : FORMAT_DATE

D : CONVERT_DATE

Answer: B

Question 3

How does Apache Ranger’s audit functionality contribute to data security?

Options :

A : By encrypting data

B : By managing user roles

C : By optimizing query performance

D : By tracking access and policy changes

Answer: D

Question 4

What is the purpose of using mapjoin in Hive queries?

Options :

A : To perform joins in parallel

B : To sort the data before joining

C : To improve data compression during joins

D : To optimize joins by loading small tables into memory

Answer: D

Question 5

How do you share a completed dashboard with others in Cloudera Data Visualization?

Options :

A : Exporting as a PDF

B : Sharing via cloud storage

C : Emailing the raw data files

D : Providing a direct URL link

Answer: D