SQL Roadmap from Zero to Advance

This hadoop interview questions​ test helps evaluate your knowledge of HDFS, MapReduce, and distributed data handling.

Hadoop Online Practice Test for Data Engineers 

In Hadoop, which component manages cluster resources and job scheduling?

What is the default replication factor in Hadoop?

What is the role of the Combiner in MapReduce?

What happens if a DataNode storing a replica fails?

What role does the Reducer play in a MapReduce job?

Why does Hadoop divide files into blocks?

What are the two main components of YARN architecture?

What does Hadoop prioritize to improve processing speed in relation to data locality?

Which of the following components is responsible for storing large data sets in the Hadoop ecosystem?

By running jobs on the same node as the data

How does Hadoop’s data locality feature reduce network bottlenecks?

How does Hadoop ensure fault tolerance when both NameNode and DataNode fail simultaneously?

How does YARN enable better resource utilization compared to the older MapReduce model?

In fraud detection systems, how is Hadoop utilized?

How does Facebook use Hadoop in their data pipeline?