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 explain about the cluster manager of apache spark?

241

If map reduce is inferior to spark then is there any benefit of learning it?

256

How can we create rdds in apache spark?

287

What are accumulators in spark?

287

Can you mention some features of spark?

305

What do you understand by the partitions in spark?

294

What is a hive on spark?

271

Mention what is the hadoop mapreduce apis contract for a key and value class?

636

Explain what combiners are and when you should use a combiner in a mapreduce job?

570

What is the function of mapreduce partitioner?

587

What combiners are and when you should use a combiner in a mapreduce job?

551

Explain what is “map” and what is "reducer" in hadoop?

594

Explain what does the conf.setmapper class do?

569

Explain what are the basic parameters of a mapper?

753

Mention what is the next step after mapper or maptask?

591

Un-Answered Questions { Hadoop }

Describe impala shell (impala-shell command)?

Is hadoop obsolete?

586

What do you mean by Schema Resolution?

After increasing the replication level, I still see that data is under replicated. What could be wrong?

422

How many instances of a jobtracker run on hadoop cluster?

590

Replication causes data redundancy then why is pursued in hdfs?

What is javardd?

280

Name types of Cluster Managers in Spark.

286

what is WebDAV in Hadoop?

676

What is the use of MasterServer?

167

What is safe mode in Hadoop?

898

what is pig?

792

What are the port numbers of namenode, job tracker and task tracker?

662

What are the important features of hadoop?

405

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

588

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