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

Can you define sqoop in hadoop?

How do you do a file system check in hdfs?

What is the difference between an input split and hdfs block?

103

What are problems with small files and hdfs?

Can you explain heartbeat in hdfs?

Can you define a block and block scanner in hdfs?

Can you explain about the indexing process in hdfs?

Can you explain apache kafka?

520

Which are the elements of kafka?

613

What is the inputsplit in map reduce software?

628

Map reduce jobs take too long. What can be done to improve the performance of the cluster?

700

Map reduce jobs are failing on a cluster that was just restarted. They worked before restart. What could be wrong?

605

Is apache spark going to replace hadoop?

357

What are the advantage of spark?

292

What is the disadvantage of spark sql?

369

Un-Answered Questions { Hadoop }

What is a mapreduce algorithm?

647

What is dataframe in spark?

289

Explain how input and output data format of the hadoop framework?

721

Use of version command in hadoop sqoop?

What is sqoop in Hadoop ?

700

Define a daemon?

675

What do you understand by mem-table in cassandra?

What is the utility of using Writable Comparable Custom Class in Map Reduce code?

997

What is Importance of Java in Apache Kafka?

554

Explain Sort Order in brief?

164

What is the history of apache mahout? Once did it start?

What is pyarrow?

417

How to enable trash/recycle bin in hadoop?

745

List various commonly used machine learning algorithm?

373

Is it possible to change the default location of a managed table?

737

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