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 }

What is identity mapper and reducer? In which cases can we use them?

1044

What is an Agent?

Explain what is a difference between an input split and hdfs block?

What is hadoop sqoop?

Define "PageRank".

305

What are the different UDF’s in Pig?

690

What are the primary phases of the reducer?

488

What are the identity mapper and reducer in MapReduce?

839

List out the commands that are used to start, check the progress and stop the ambari server?

Is apache spark in demand?

281

What are the basic commands in Apache Sqoop and its uses?

How does spark program work?

284

What do you understand by Filters in HBase?

147

Who is a 'user' in HDFS?

941

what is the default replication factor in HDFS?

1053

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