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

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

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 master node in spark?

286

Explain cogroup() operation in Spark?

269

Why is the spark so fast?

294

Why do we need sparkcontext?

282

What are the tools that are we needed or helps to build ambari?

Define a metadata?

611

What is mlib?

283

How do users interact with HDFS in Apache Pig ?

719

Why hbase is a schema-less database?

173

What is keyvaluetextinputformat?

696

What is difference between cache and persist in spark?

263

List out Hadoop's three configuration files?

564

What are the ways to run spark over hadoop?

293

What are the different compaction types in hbase?

169

Is Apache Kafka is a distributed streaming platform? if yes, what you can do with it?

594

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