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

Big Data Interview Questions

Questions Answers Views Company eMail

Mention what is the data storage component used by hadoop?

490

Mention what does the text input format do?

458

Mention what daemons run on a master node and slave nodes?

516

Explain what is namenode in hadoop?

486

Explain what is a sequence file in hadoop?

528

Mention how many inputsplits is made by a hadoop framework?

620

Explain what is jobtracker in hadoop? What are the actions followed by hadoop?

458

Explain is it possible to search for files using wildcards?

534

Explain what is hadoop?

473

Explain what is sequencefileinputformat?

499

Mention how hadoop is different from other data processing tools?

455

Mention what are the most common input formats defined in hadoop?

486

Mention what is rack awareness?

429

Mention what is the difference between an rdbms and hadoop?

474

Mention what are the three modes in which hadoop can be run?

468

Un-Answered Questions { Big Data }

Why Apache Spark?

335

What are consumers or users?

656

What is a bag in apache pig?

577

Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?

491

What are the three types of tombstone markers in hbase?

159

Why are spark transformations lazy?

310

What do you understand by Pair RDD?

404

Explain JobConf in MapReduce.

857

How many Reducers run for a MapReduce job in Hadoop?

632

Name different elements of JConsole?

Define a datanode?

694

How can you execute a free-form SQL query in Sqoop to import the rows in a sequential manner?

Define the run-time architecture of Spark?

295

How does hadoop achieve fault tolerance?

458

What is SparkSession in Apache Spark?

307

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