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

Explain the difference between nas and hdfs?

What is a job tracker?

What is the difference betwaeen mapreduce engine and hdfs cluster?

What is the difference between namenode, backup node and checkpoint namenode?

Is namenode also a commodity?

What does hbase consists of?

186

What are the three types of tombstone markers in hbase?

159

How many operational command in hbase?

185

Explain deletion in hbase?

157

What is the maximum recommended cell size?

178

How to open a connection in hbase?

157

What are the different compaction types in hbase?

183

What is compaction in hbase?

173

What is hotspotting in hbase?

179

What is ttl (time to live) in hbase?

192

Un-Answered Questions { Hadoop }

In hadoop_pid_dir, what does pid stands for?

580

Explain the shuffle?

959

Can you explain sequence file in hadoop?

453

Name three data source available in SparkSQL

319

What is HDFS High Availability?

1019

What are the machine learning algorithms supports in apache mahout?

115

What are the relational operators available related to loading and storing in pig language?

665

What are the functions of "Spark Core"?

310

What are problems with small files and hdfs?

List few benefits of spark over map reduce?

316

what is NameNode in Hadoop?

945

What is accumulators and broadcast variables in spark?

339

Explain the master class and the output class do?

691

Explain the RDD properties?

333

Give some points of hive for hadoop ?

771

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