Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Hadoop Interview Questions

Questions Answers Views Company eMail

Write the command to copy a file from linux to hdfs?

How to copy file from HDFS to local?

How much Metadata will be created on NameNode in Hadoop?

What do you mean by metadata in Hadoop?

How to Delete directory and files recursively from HDFS?

How does HDFS Index Data blocks? Explain.

How to access HDFS?

Explain the process that overwrites the replication factors in HDFS?

Difference Between Hadoop and HDFS?

How would you import data from MYSQL into HDFS ?

Define HDFS and talk about their respective components?

What is the module in HDFS?

Tell me two most commonly used commands in HDFS?

What is a block in HDFS? what is the default size in Hadoop 1 and Hadoop 2? Can we change the block size?

HDFS is used for applications with large data sets, not why Many small files?

Un-Answered Questions { Hadoop }

How do you run the pig scripts in local mode?

526

How does lazy evaluation work in spark?

287

What file systems does spark support?

1787

Why do we need Hadoop Archives? How is it created?

563

What is data pipeline in spark?

297

Explain what happens in text format?

573

What are the different Data Types available in Hive?

699

Define compaction in HBase?

168

Which command do we use to show the version?

160

What kind of hardware is best for hadoop?

418

What is Streaming / Log Data?

What is hinted handoff?

What do you understand by the super column in cassandra?

What are the primary phases of a Reducer?

824

Can you explain worker node?

403

For More Un-Answered { Hadoop } Questions Click Here