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?

260

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

281

How can we create rdds in apache spark?

313

What are accumulators in spark?

311

Can you mention some features of spark?

320

What do you understand by the partitions in spark?

317

What is a hive on spark?

292

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

682

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

615

What is the function of mapreduce partitioner?

639

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

598

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

644

Explain what does the conf.setmapper class do?

611

Explain what are the basic parameters of a mapper?

804

Mention what is the next step after mapper or maptask?

632

Un-Answered Questions { Hadoop }

How does hdfs give great throughput?

What is closing out ledgers?

List some use cases where classification machine learning algorithms can be used.

463

What is the role of Connector API?

553

What are the different CQL data manipulation commands in Cassandra?

115

What is the difference between spark ml and spark mllib?

283

What is anti-entropy?

How namenode handles data node failures?

524

How can we check whether namenode is working or not?

659

Explain HCatWriter?

Explain cap theorem?

103

Explain REVERSE function in Hive with example?

767

How much space will the split occupy in Mapreduce?

672

List the diagnostic operators in pig.

588

Explain data flow in Flume?

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