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

Name the operating system(s) which are supported for production hadoop deployment?

475

Explain in which directory hadoop is installed?

513

List of the some best tools that can be useful for data-analysis?

477

Explain the difference between an inputsplit and a block?

463

What is the use of cloudera?

485

Explain about the indexing process in hdfs?

Explain what is difference between an input split and hdfs block?

Replication causes data redundancy then why is pursued in hdfs?

Since the data is replicated thrice in hdfs, does it mean that any calculation done on one node will also be replicated on the other two?

If a particular file is 50 mb, will the hdfs block still consume 64 mb as the default size?

What is the difference between an hdfs block and input split?

Explain hdfs?

Explain the key features of hdfs?

How does hdfs get a good throughput?

Explain how indexing is done in hdfs?

Un-Answered Questions { Hadoop }

What are ‘reduces’?

772

Why do we need Pig?

868

Is a job split into maps?

1078

What are the main classes of Data Transfer API?

How to copy file from HDFS to local?

Explain HDFS “Write once Read many” pattern?

List some benefits of apache kafka?

595

How does apache spark engine work?

332

How is spark different from hadoop?

308

Can aluminum cause a spark?

330

Can you explain how to minimize data transfers while working with Spark?

548

What are the types of Apache Spark transformation?

304

What is application master in spark?

298

what is difference between int and intwritable?

1515

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

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