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

Big Data Interview Questions

Questions Answers Views Company eMail

Why is Transformation lazy in Spark?

364

Does Hoe Spark handle monitoring and logging in Standalone mode?

291

Explain foreach() operation in apache spark?

319

What are the various functions of Spark Core?

348

What is the job of blend () and repartition () in Map Reduce?

696

Explain the flatMap() transformation in Apache Spark?

324

What is RDD lineage graph? How does it enable fault-tolerance in Spark?

331

What is PageRank in Spark?

291

What are the drawbacks of Apache Spark?

338

Explain textFile Vs wholeTextFile in Spark?

444

Explain benefits of lazy evaluation in RDD in Apache Spark?

332

Explain first() operation in Apache Spark?

315

Explain Spark map() transformation?

380

What are the types of transformation in RDD in Apache Spark?

338

Why is transformation lazy operation in Apache Spark RDD? How is it useful?

302

Un-Answered Questions { Big Data }

What is graphx spark?

303

What are the features of apache cassandra?

How will you convert the string ’51.2’ to a float value in the price column?

931

How does impala achieve its performance improvements?

What is SequenceFileInputFormat in Hadoop MapReduce?

678

How to start hbase services?

216

What is throughput in Hadoop?

587

What are the key differences between cassandra and traditional rdbms?

What is the next step after Mapper or MapTask?

706

Is it possible to add or delete column families in a working group?

Can the balancer be run while Hadoop is in use?

1024

Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?

664

Explain avrostorage function?

669

Clarify about the smb join in hive?

718

Does HDFS allow a client to read a file which is already opened for writing?

For More Un-Answered { Big Data } Questions Click Here