Take this free Hadoop online test to evaluate your knowledge of Hadoop architecture, including HDFS, MapReduce, YARN, and essential Hadoop ecosystem tools.

Hadoop Online Test – Practice Questions on HDFS, MapReduce & YARN

Which of the following is NOT a component of Hadoop ecosystem?

In Hadoop, which file keeps track of DataNodes and block locations?

Reduces storage overhead compared to replication

Eliminates the need for a Secondary NameNode

What is the primary benefit of using erasure coding in Hadoop 3.x?

What is the primary difference between Hadoop 2.x and Hadoop 3.x?

Which of the following is NOT a valid input format in Hadoop?

Which component of Hadoop is responsible for parallel execution of large-scale data processing?

What does the Secondary NameNode do in Hadoop?

 In Hadoop, what is the default block size in HDFS for Hadoop 3.x?

Manages job scheduling and resource allocation

What is the role of the ResourceManager in YARN?

 In HDFS, what happens if a NameNode crashes?

By placing data on the same node where computation runs

By replicating data across clusters randomly

NameNode removes it and re-replicates data

What happens when a DataNode fails in Hadoop?

Running duplicate tasks to handle slow nodes

What is speculative execution in Hadoop MapReduce?

Which command is used to list files in HDFS?

Which scheduler in Hadoop allows multiple users to share cluster resources fairly?