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 are the port numbers of namenode, job tracker and task tracker?

663

Is fs.mapr.working.dir a single directory?

640

How can we look for the namenode in the browser?

670

What do slaves consist of?

614

How can we check whether namenode is working or not?

614

What happens to job tracker when namenode is down?

628

How can I restart namenode?

661

What do masters consist of?

645

What if a namenode has no data?

623

Which are the three main hdfs-site.xml properties?

611

What is formatting of the dfs?

770

In cloudera there is already a cluster, but if I want to form a cluster on ubuntu can we do it?

675

Does this lead to security issues?

696

How to change from su to cloudera?

667

Why password is needed in ssh localhost?

729

Un-Answered Questions { Big Data }

What is sqoop and flume?

What is javardd?

280

What are the core methods of a Reducer?

466

Where are rdd stored?

271

What is the importance of — the split-by clause in running parallel import tasks in sqoop?

Can you explain the core methods of a reducer?

450

What do you understand by Executor Memory in a Spark application?

452

What are the basic commands in Apache Sqoop and its uses?

Explain Working of MapReduce?

918

what factors the block size takes before creation?

958

What is Text Input Format?

624

What is meant by in-memory processing in Spark?

284

Can multiple clients write into an HDFS file concurrently in hadoop?

What are mapreduce new and old apis while writing map reduce program?. Explain how it works

579

What is worker node in Apache Spark cluster?

280

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