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

Big Data Interview Questions

Questions Answers Views Company eMail

Define the term ‘sparse vector.’

297

Define the roles of the file system in any framework?

318

What happens to rdd when one of the nodes on which it is distributed goes down?

444

List commonly used machine learning algorithm?

302

Explain the filter transformation?

339

what do you mean by the worker node?

330

What is rdd lineage graph? How is it useful in achieving fault tolerance?

322

Explain about trformations and actions in the context of rdds?

326

What is the key difference between textfile and wholetextfile method?

292

What do you understand by the parquet file?

294

If there is certain data that we want to use again and again in different transformations, what should improve the performance?

322

Explain partitions?

296

Explain api create or replace tempview()?

351

Define parquet file format? How to convert data to parquet format?

343

Explain mappartitions() and mappartitionswithindex()?

440

Un-Answered Questions { Big Data }

What is the difference between piglatin and hiveql?

713

What is the difference between external table and managed table?

1025

What is the difference between cassandra's schema and rdbms schema?

What do you understand by standalone (or local) mode?

480

How apache spark works?

314

Mention what are the data components used by Hadoop?

701

What are the configuration parameters in the 'MapReduce' program?

729

Define big data?

623

What are Prerequisites to learn Avro?

How hbase uses zookeeper?

What are keywords?

What is the difference between map and flatmap?

326

How to call impala built-in functions?

What is Secondary NameNode in Hadoop HDFS?

what happens when namenode goes down during file read operation in hadoop?

650

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