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 combiners are and when you should use a combiner in a mapreduce job?

551

Explain what is “map” and what is "reducer" in hadoop?

595

Explain what does the conf.setmapper class do?

570

Explain what are the basic parameters of a mapper?

753

Mention what is the next step after mapper or maptask?

592

Explain what is shuffling in mapreduce?

575

Explain what is distributed cache in mapreduce framework?

581

Mention what are the main configuration parameters that user need to specify to run mapreduce job?

687

Explain what is the function of mapreduce partitioner?

599

Explain what is heartbeat in hdfs?

Explain what is a difference between an input split and hdfs block?

Explain how indexing in hdfs is done?

Mention what is the best way to copy files between hdfs clusters?

Mention what is the difference between hdfs and nas?

What is a difference between an input split and hdfs block?

Un-Answered Questions { Big Data }

How to debug Hadoop code?

476

What is SparkContext in Apache Spark?

292

How many types of Transformation are there?

300

What is NoSQL?

872

Mention what is the number of default partitioner in Hadoop?

632

Define Nodetool Utility?

What are the features of apache mahout?

What is a column family in Cassandra?

Whenever we run hive query, new metastore_db is created. Why?

649

What is Identity reducer?

473

What are the operating systems supported by Apache Ambari?

Why HDFS?

what Hive is composed of ?

628

How do we create rdds in spark?

539

Which classes are used by the hive to read and write hdfs files?

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