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.’

283

Define the roles of the file system in any framework?

306

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

435

List commonly used machine learning algorithm?

292

Explain the filter transformation?

311

what do you mean by the worker node?

312

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

310

Explain about trformations and actions in the context of rdds?

308

What is the key difference between textfile and wholetextfile method?

266

What do you understand by the parquet file?

280

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

304

Explain partitions?

278

Explain api create or replace tempview()?

339

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

317

Explain mappartitions() and mappartitionswithindex()?

424

Un-Answered Questions { Big Data }

Explain the concept of cassandra data model?

114

What is the problem in having lots of small files in hdfs?

What are the various libraries available on top of Apache Spark?

309

what are the languages supported by apache spark for developing big data applications?

545

What is accumulator in spark?

489

Who are Intended Audience to learn Avro?

Can hadoop replace relational database?

423

What is Combiner in Hadoop?

534

How does spark rdd work?

317

What is the key difference between NameNode and DataNode in Hadoop?

492

Mention what is the difference between Hbase and Hive?

693

what is Memtable in Cassandra?

109

What are the functionalities of jobtracer?

410

What is SuperColumn in Cassandra?

109

What will you do when NameNode is down?

1008

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