Question 1

Which command is used to invalidate metadata in Impala when changes are made to underlying data files in Cloudera?

Options :

A : REFRESH

B : LOAD DATA INPATH

C : ALTER TABLE

D : INVALIDATE METADATA

Answer: D

Question 2

What role does the NameNode play in HDFS?

Options :

A : Stores actual data blocks

B : Directly manages data block storage

C : Stores data replication information

D : Manages metadata about files and directories

Answer: D

Question 3

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 4

How does Cloudera’s Data Catalog Service improve data lineage tracking?

Options :

A : By providing real-time data replication

B : By enhancing user access controls

C : By optimizing storage efficiency

D : By maintaining detailed metadata records

Answer: D

Question 5

In Apache Atlas, how can you trace the impact of a schema change on downstream data processing?

Options :

A : By using data snapshots

B : By reviewing lineage relationships and impact analysis

C : By querying data directly

D : By analyzing log files

Answer: B