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 a mapreduce algorithm?

642

What is mapreduce algorithm?

591

What is hdfs block size?

How hdfs is different from traditional file systems?

How is hdfs block size different from traditional file system block size?

When the reducers are are started in a mapreduce job?

596

Where the mapper's intermediate data will be stored?

638

Which are the methods in the mapper interface?

635

What is a namenode? How many instances of namenode run on a hadoop cluster?

643

What do you mean by taskinstance?

750

How hdfa differs with nfs?

741

How a task is scheduled by a jobtracker?

674

How many maximum jvm can run on a slave node?

687

What are the two main parts of the hadoop framework?

669

What is the use of combiners in the hadoop framework?

619

Un-Answered Questions { Hadoop }

Explain in brief what is the architecture of Spark?

312

Explain Cqlsh?

What is the replication factor?

What is the problem with HDFS and streaming data like logs

1022

What do you understand by High availability?

what if job tracker machine is down?

475

Discuss the precautions that are needed to take care while adding a column?

Is spark sql faster than hive?

287

Explain what is Cassandra-Cqlsh?

How can you debug a pig script?

596

What is sparkContext?

284

How to set property in apache tajo?

Who divides the file into Block while storing inside hdfs in hadoop?

What do you mean by inputformat?

613

Is ambari python client can be used to make good use of ambari api’s?

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