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 the command to change the replication factor ?

501

What is JobTracker?

435

How many datanodes can run on a single Hadoop cluster?

452

What are some typical functions of Job Tracker?

428

What is TaskTracker?

484

Give a brief overview of Hadoop history?

418

How Big is ‘Big Data’?

427

How can you set an arbitrary number of mappers to be created for a job in Hadoop?

461

How many job tracker processes can run on a single Hadoop cluster?

474

What are some of the characteristics of Hadoop framework?

438

Where are Hadoop’s configuration files located?

508

Can you give a detailed overview about the Big Data being generated by Facebook?

432

How to remove safemode of namenode forcefully in HDFS?

Who divides the file into Block while storing inside hdfs in hadoop?

What are file permissions in HDFS? how does HDFS check permissions for files/directory?

Un-Answered Questions { Big Data }

What is SSTable?

State the difference between persist() and cache() functions.

319

What are the ways to create RDDs in Apache Spark? Explain.

306

Define sparkcontext in apache spark?

313

How to create and manage a view in HCatalog?

How to setup the local repository manually?

How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?

728

What is a topic in kafka?

480

Can we have different replication factor of the existing files in hdfs?

What is scala and spark?

271

What is Rack Awareness in Apache Hadoop?

811

Why Do We Need Apache Pig?

644

Explain the features of pseudo mode?

703

Explain the default level of parallelism in Apache Spark

314

Define a commodity hardware? Does commodity hardware include ram?

747

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