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?

1172

What is the Job interface in MapReduce framework?

909

What is the problem with HDFS and streaming data like logs

1022

What is the Use of SSH in Hadoop ?

959

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

1006

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

1076

What is Schema on Read and Schema on Write?

916

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

MRO,

1092

Write a Pig UDF Example ?

772

What is the difference between traditional RDBMS and Hadoop?

1173

What is the main purpose of HDFS fsck command?

1792

What is safe mode in Hadoop?

961

Detail description of the Reducer phases?

852

What is MapFile?

966

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

1233

Un-Answered Questions { Hadoop }

Write a quert to import a file in sqoop?

Explain totuple function?

603

What kind of music is flume?

What is difference between secondary namenode, checkpoint namenode & backupnod secondary namenode, a poorly named component of hadoop?

722

What is worker node in Apache Spark cluster?

300

Which serialization libraries are supported in spark?

332

What is the difference between apache mahout and prediction.io ?

How to create and manage a view in HCatalog?

Who developed Apache Avro?

What are the parameters used to create a keyspace?

112

Is it possible to run Apache Spark without Hadoop?

277

Explain the difference between nas and hdfs?

How do we create rdds in spark?

558

What do you understand by snitches?

What is driver memory and executor memory in spark?

326

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