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?

282

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?

293

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

684

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?

633

Un-Answered Questions { Hadoop }

What is spark in python?

290

What is apache spark written in?

273

What are accumulators in spark?

311

What is a block?

Types of Data Flow in Flume?

111

What is a combiner in hadoop?

510

What is a bloom filter and how does it help in searching rows?

175

How can Spark be connected to Apache Mesos?

327

What is spark used for?

268

How do I know if flume agent is running?

116

Use of create-hive-table command in hadoop sqoop?

What is the difference between DAG and Lineage?

1620

What are the different types of tombstone markers in HBase for deletion?

866

What is the difference between Apache Pig and Hive?

607

What are the core methods of a Reducer?

511

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