Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Hadoop Interview Questions

Questions Answers Views Company eMail

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

443

Explain in which directory hadoop is installed?

479

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

447

Explain the difference between an inputsplit and a block?

434

What is the use of cloudera?

455

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 is Shuffling and Sorting in a MapReduce?

672

What are the data formats supported by apache tajo?

Explain various Apache Spark ecosystem components. In which scenarios can we use these components?

385

What is session in Cassandra?

161

what is the typical block size of an HDFS block?

926

What is HDFS block size and what did you chose in your project?

984

Explain HDFS “Write once Read many” pattern?

What are the relational operators available related to combining and splitting in pig language?

719

What is jmx connector?

What do you understand by Data Replication in Cassandra?

What is rack-aware replica placement policy?

1039

What do you mean by logging in cassandra?

Why HDFS performs replication, although it results in data redundancy in Hadoop?

Define commit log?

Are results returned as they become available, or all at once when a query completes?

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