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 is the advantage of using INSERT OVERWRITE DIRECTORY over INSERT INTO in Hive?

Options :

A : It appends results to the existing data.

B : It overwrites existing data in the specified directory.

C : It creates a backup of the query results.

D : It creates a new table for results.

Answer: B

Question 3

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 4

Which function is used to cast a column to a different data type in Impala?

Options :

A : TRANSFORM

B : CHANGE

C : CAST

D : CONVERT

Answer: C

Question 5

When should you consider using ORC format over Parquet in Cloudera?

Options :

A : When simplicity of schema is a priority

B : When data is primarily text-based

C : When working with large-scale, complex data processing workloads

D : When backward compatibility is required

Answer: C

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