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 catalyst query optimizer in apache spark?

293

What are the various types of shared variable in apache spark?

293

Define the common faults of the developer while using apache spark?

289

What is the use of spark driver, where it gets executed on the cluster?

370

What is speculative execution in spark?

322

Explain write ahead log(journaling) in spark?

269

Explain values() operation in apache spark?

498

Define the level of parallelism and its need in spark streaming?

391

Define sparksession in apache spark? Why is it needed?

275

Describe different transformations in dstream in apache spark streaming?

305

In hadoop_pid_dir, what does pid stands for?

524

What are the network requirements for hadoop?

474

What does hadoop-env.sh do?

449

Which are the three modes in which hadoop can be run?

478

Where is hadoop-env.sh file present?

484

Un-Answered Questions { Big Data }

How often do you need to reformat the namenode?

512

Explain in brief what is the architecture of Spark?

312

Main Components of Hadoop?

769

what should be the ideal replication factor in hadoop?

653

What are the different Primitive Data Types available in Hive?

694

Differentiate between GROUP and COGROUP operators?

630

How will you merge the contents of two or more relations and divide a single relation into two or more relations?

938

On which all platform can Apache Spark run?

269

Explain plucktuple?

582

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

595

Can you explain spark graphx?

295

Data node block size in HDFS, why 64MB?

What are the key differences between cassandra and traditional rdbms?

How are joins performed in impala?

103

Establish the difference between a node, cluster & data centres in Cassandra.

143

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