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

Big Data Interview Questions

Questions Answers Views Company eMail

What is the job tracker role in hadoop?

426

Explain how do you overwrite replication factor?

433

Explain how can we check whether namenode is working or not?

570

Define a udf?

416

Define a sequence file in hadoop?

539

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

437

Explain in which directory hadoop is installed?

469

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

437

Explain the difference between an inputsplit and a block?

427

What is the use of cloudera?

448

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?

Un-Answered Questions { Big Data }

Can free form SQL queries be used with Sqoop import command?

What is Apache Kafka?

547

What are channel selectors?

1029

What is presto verifier?

Explian the Limitations of HBase?

187

Explain the common input formats in hadoop?

466

Explain how you can get exactly once messaging from kafka during data production?

522

What is the functionality of Query Processor in Apached Hive ?

708

Is spark and hadoop same?

266

How is a keyspace created in cassandra? & What are the parameters used?

Why we are using flume?

What is sparkconf spark?

281

Which serialization libraries are supported in spark?

332

Explain the commit log?

What are the identity mapper and reducer in MapReduce?

781

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