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?

406

Mention what does the text input format do?

381

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

441

Explain what is namenode in hadoop?

401

Explain what is a sequence file in hadoop?

424

Mention how many inputsplits is made by a hadoop framework?

533

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

369

Explain is it possible to search for files using wildcards?

428

Explain what is hadoop?

402

Explain what is sequencefileinputformat?

410

Mention how hadoop is different from other data processing tools?

374

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

411

Mention what is rack awareness?

356

Mention what is the difference between an rdbms and hadoop?

386

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

388

Un-Answered Questions { Big Data }

What happen if number of reducer is set to 0 in Hadoop?

464

How to optimize Hive Performance?

659

Can Hadoop be compared to NOSQL database like Cassandra?

853

Define cell in HBase?

159

Mention some machine learning algorithms exposed by mahout?

What is CQL?

What is Hadoop serialization?

636

What happen if a datanode loses network connection for a few minutes?

551

What is a yaml file in cassandra?

What is the advantage of using –password-file rather than -P option while preventing the display of password in the sqoop import statement?

Is the keyword ‘DEFINE’ as a function name?

519

What is difference between spark and mapreduce?

255

How can we see only top 15 records from the student.txt out of100 records in the HDFS directory?

543

Can we submit the mapreduce job from slave node?

1050

Can you explain how you can use Apache Spark along with Hadoop?

289

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