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 JobTracker in Hadoop? What are the actions followed by Hadoop?

769

Is it possible to split 100 lines of input as a single split in MapReduce?

964

What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?

885

Is it possible to rename the output file?

791

how JobTracker schedules a task ?

850

what is NameNode in Hadoop?

878

what does the conf.setMapper Class do ?

815

how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?

784

What is SequenceFileInputFormat?

823

What is a "map" in Hadoop?

795

What is a "reducer" in Hadoop?

873

what is Speculative Execution?

832

Explain JobConf in MapReduce.

810

What is OutputCommitter?

811

How is reporting controlled in hadoop?

782

Un-Answered Questions { Big Data }

Explain the level of parallelism in spark streaming?

289

Is spark and hadoop same?

266

What is the latest version of spark?

267

What is the next step after Mapper or MapTask?

645

What are channel selectors?

1029

Why HDFS stores data using commodity hardware despite the higher chance of failures in hadoop?

Which command do we use to run HBase Shell?

197

Name some features of Apache Cassandra?

List various commonly used machine learning algorithm?

373

Explain various level of persistence in Apache Spark?

302

Can I do transforms or add new functionality?

How to stop a partition form being queried?

1159

how can we access the sub directories recursively?

792

Why is spark fast?

295

Can you define udf?

424

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