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 }

In which scenario Pig is better fit than MapReduce?

835

What ensures load balancing of the server in Kafka?

658

What is the maximum recommended cell size?

174

How do you list all databases whose name starts with p?

692

What is Sqoop Validation?

Can you explain spark core?

264

Is it legal to set the number of reducer task to zero? Where the output will be stored in this case?

662

Define the management tools in Cassandra?

What is cloudera and why it is used?

797

What are the three types of tombstone markers in hbase?

152

What file systems does spark support?

1787

Explain reduceByKey() Spark operation?

300

What is illustrate used for in apache pig?

594

Which scala library is used for functional programming?

461

Explain the hdfs architecture?

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