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?

104

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?

614

What is the inputsplit in map reduce software?

629

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

701

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

609

Is apache spark going to replace hadoop?

360

What are the advantage of spark?

292

What is the disadvantage of spark sql?

369

Un-Answered Questions { Hadoop }

What are the various configuration parameters required to run a mapreduce job?

672

How to get the single file as the output from MapReduce Job?

636

What are collection data types in Hive?

733

Explain about the different channel types in Flume.

how you can get exactly once messaging from Kafka during data production?

561

What are brokers in kafka?

509

What do you mean by the high availability of a namenode?

Is kafka part of hadoop?

515

What do you mean by taskinstance?

755

What is a table generating function on hive?

723

Are multiline comments supported in Hive?

3291

Which files are used by the startup and shutdown commands?

725

Is spark sql faster than hive?

291

What is kafka in hadoop?

526

What is salary of hadoop developer?

697

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