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 NameNode? How NameNode tackle Datanode failures in Hadoop?

511

How often DataNode send heartbeat to NameNode in Hadoop?

595

What is Mapper? How can we compress Mapper output in Hadoop?

572

What is Rack Awareness? What is its need in Hadoop?

584

What is Erasure Coding in Hadoop?

559

Why do we need Hadoop Archives? How is it created?

616

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

564

What is CAP Theorem? What aspects does Hadoop support from this theorem?

535

Why do we need Hadoop?

577

What are the core components of Hadoop?

574

What are the Features of Hadoop?

579

Compare Hadoop and RDBMS?

468

What are the modes in which Hadoop run?

565

What are the features of Standalone (local) mode?

656

What are the features of Pseudo mode?

560

Un-Answered Questions { Big Data }

What is accumulator in spark?

513

Explain Spark saveAsTextFile() operation?

363

What is Secondary NameNode in Hadoop HDFS?

Explain the data model of hbase.

178

Does HDFS allow a client to read a file which is already opened for writing?

What is document store db? Explain with an example.

What type of data we should put in distributed cache? When to put the data in dc? How much volume we should put in?

492

Name different elements of JConsole?

Can You Use Apache Spark To Analyze and Access Data Stored In Cassandra Databases?

316

What are the different ways of executing Pig script?

853

In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?

703

What is the use of InputFormat in MapReduce process?

714

What is Sqoop Validation?

While processing data from hdfs, does it execute code near data?

What is the spark driver?

345

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