Apache Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop Interview Questions

Questions Answers Views Company eMail

What is a speculative execution in Apache Hadoop MapReduce?

549

What are the modes in which Apache Hadoop run?

550

What is Safemode in Apache Hadoop?

497

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

517

Why is Apache Spark faster than Apache Hadoop?

552

What does ‘jps’ command do?

519

Mention what is the use of Context Object?

534

What is commodity hardware?

493

Explain what is sqoop in Hadoop ?

534

Explain how do ‘map’ and ‘reduce’ works?

554

Explain what is the purpose of RecordReader in Hadoop?

564

How to restart Namenode?

570

Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?

609

Mention what are the data components used by Hadoop?

483

What does /etc /init.d do?

525

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Un-Answered Questions { Apache Hadoop }

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1065

Which is the best hadoop certification?

492

How to exit the vi editor?

517

What alternate way does HDFS provides to recover data in case a Namenode

778

What stored in HDFS?

731

Explain the hadoop configuration files at present?

473

Is hadoop the future?

468

What is the function of ApplicationMaster?

783

What infrastructure do we need to process 100 TB data using Hadoop?

834

What is inputsplit in hadoop? Explain.

559

Explain the difference between NameNode

749

Is map like a pointer?

765

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

532

Define a datanode?

481

Have you ever used Counters in Hadoop. Give us an example scenario?

840

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