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MapReduce Interview Questions
Questions Answers Views Company eMail

In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

 383

How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

 382

What is the relation between MapReduce and Hive?

 372

What are advantages of Spark over MapReduce?

 345

What is the use of InputFormat in MapReduce process?

 381

What is Counter in MapReduce?

 352

What is the difference between a MapReduce InputSplit and HDFS block?

 411

How to compress mapper output in Hadoop?

 384

Why is Apache Spark faster than Hadoop MapReduce?

 366

Define MapReduce?

 424

Where is the output of Mapper written in Hadoop?

 380

Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?

 381

Explain the difference between a MapReduce InputSplit and HDFS block?

 394

How to create custom key and custom value in MapReduce Job?

 353

How is Spark not quite the same as MapReduce? Is Spark quicker than MapReduce?

 357

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Un-Answered Questions { MapReduce }

Compare Pig vs Hive vs Hadoop MapReduce?

367

Difference between mapreduce and spark

384

What is the data storage component used by Hadoop?

360

What is the best way to copy files between HDFS clusters?

351

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

611




how can you check whether Namenode is working beside using the jps command?

399

Detail description of the Reducer phases?

578

How to write a custom partitioner for a Hadoop MapReduce job?

370

What is Counter in MapReduce?

352

Explain InputSplit in Hadoop MapReduce?

389

What combiners is and when you should use a combiner in a MapReduce Job?

369

List the configuration parameters that have to be specified when running a MapReduce job.

362

What are the various configuration parameters required to run a mapreduce job?

366

What is a RecordReader in Hadoop MapReduce?

392

How to overwrite an existing output file/dir during execution of Hadoop MapReduce jobs?

382

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