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

How do I download apache mahout?

What is the maximum size of a message that can be received by the kafka?

553

What are the features of kafka?

544

What are the role of kafka producer api plays?

504

What are the benefits of apache kafka over the traditional technique?

998

When does queuefullexception occur?

655

What is the main difference between kafka and fume?

594

How to start kafka server?

587

What is partitioning key?

562

What is kafka?

556

What are the different components that are available in kafka?

511

How to start zookeeper server?

What is the role of the zookeeper?

Difference between cassandra and mongodb?

What we need to be taken care while adding a column?

100

Un-Answered Questions { Hadoop }

Where is hadoop-env.sh file present?

485

What is Spark DataFrames?

276

Can you define sqoop in hadoop?

If there is certain data that we want to use again and again in different transformations, what should improve the performance?

306

How does hdfs provides good throughput?

What is the difference between Hadoop and RDBMS?

637

What is the purpose of JConsole?

Can you explain apache spark?

322

Explain how can apache spark be used alongside hadoop?

258

If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?

716

Explain how indexing is done in hdfs?

What is fluming?

161

What are problems with small files and hdfs?

what are views in Hive?

767

What is the use of flatmap in spark?

285

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