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

What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?

1122

What is the Job interface in MapReduce framework?

861

What is the problem with HDFS and streaming data like logs

967

What is the Use of SSH in Hadoop ?

919

What infrastructure do we need to process 100 TB data using Hadoop?

955

What is the difference between a Hadoop and Relational Database and Nosql?

1025

What is Schema on Read and Schema on Write?

862

How to overwrite an existing output file during execution of mapreduce jobs?

MRO,

1047

Write a Pig UDF Example ?

721

What is the difference between traditional RDBMS and Hadoop?

1126

What is the main purpose of HDFS fsck command?

1717

What is safe mode in Hadoop?

900

Detail description of the Reducer phases?

809

What is MapFile?

925

What do you understand from Node redundancy and is it exist in hadoop cluster?

1182

Un-Answered Questions { Hadoop }

What are the 2 types of table in hive?

623

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

How Hadoop is cost-effective?

379

Compare Hadoop and Spark?

304

What is salting in spark?

395

Explain Creating an Index?

What is the function of Cluster.Builder class in Cassandra?

135

List out the different stream grouping in apache storm?

347

What is the abstraction of Spark Streaming?

249

Is it possible to run Spark and Mesos along with Hadoop?

263

What does jps command do in Hadoop?

592

Does Hoe Spark handle monitoring and logging in Standalone mode?

261

hbase support syntax structure like sql. Yes or no?

190

What are the different functions available in pig latin language?

527

What does hadoop-metrics.properties file do?

488

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