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?

712

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

683

How can we look for the namenode in the browser?

717

What do slaves consist of?

667

How can we check whether namenode is working or not?

659

What happens to job tracker when namenode is down?

668

How can I restart namenode?

720

What do masters consist of?

694

What if a namenode has no data?

667

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

665

What is formatting of the dfs?

828

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

737

Does this lead to security issues?

740

How to change from su to cloudera?

719

Why password is needed in ssh localhost?

801

Un-Answered Questions { Big Data }

can you run Apache Spark On Apache Mesos?

310

Clarify how hive de-serialize and serialize the information?

643

How will you design or modify schema in hbase programmatically?

157

What does it indicate if replica stays out of ISR for a long time?

707

What is Hadoop Map Reduce ?

805

What is yarn in hadoop?

676

What is the FlatMap Transformation in Apache Spark RDD?

293

what are the key components of hbase?

173

What is the default input type in MapReduce?

661

Is hive suitable to be used for oltp systems? Why?

795

What is Safemode in Apache Hadoop?

735

How does reducebykey work in spark?

255

Is it necessary to install spark on all the nodes of a YARN cluster while running Apache Spark on YARN ?

344

Tunable consistency is supported by Cassandra. Explain.

Wherever (Different Directory) I run the hive query, it creates new metastore_db, please explain the reason for it?

747

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