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 different UDF’s in Pig?

654

What is Apache Hadoop? Why is Hadoop essential for every Big Data application?

907

What are the core components of Apache Hadoop?

784

What is the difference between Apache Hadoop and RDBMS?

807

How is security achieved in Apache Hadoop?

909

What is Apache Hadoop?

855

What is a “Distributed Cache” in Apache Hadoop?

777

What is the problem with small files in Apache Hadoop?

783

What is Rack Awareness in Apache Hadoop?

811

Explain Erasure Coding in Apache Hadoop?

754

What is Disk Balancer in Apache Hadoop?

889

What is a speculative execution in Apache Hadoop MapReduce?

793

What are the modes in which Apache Hadoop run?

800

What is Safemode in Apache Hadoop?

735

What are the different methods to run Spark over Apache Hadoop?

718

Un-Answered Questions { Big Data }

How to keep files in HDFS?

Elaborate on Identifiers?

121

What do you think about the speculative execution?

437

Explain a scenario where you will be using spark streaming.

1458

How many daemon processes run on a hadoop cluster?

457

Can you define a udf?

556

What is Directed Acyclic Graph(DAG)?

309

What is spark code?

315

Explain the RDD properties?

311

Is it possible to change the default location of Managed Tables in Hive, if so how?

719

What is spark used for?

268

What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

528

What are the relational operators available related to Grouping and joining in Pig language?

482

Explain first() operation in Spark?

348

What do you mean by cassandra-cqlsh?

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