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 configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?

830

What is HDFS block size and what did you chose in your project?

728

What is HDFS High Availability?

808

What are different types of filesystem?

911

how can we change Replication Factor?

763

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

665

What are the core components of Apache Hadoop?

511

What is the difference between Apache Hadoop and RDBMS?

532

How is security achieved in Apache Hadoop?

574

What is Apache Hadoop?

623

What is a “Distributed Cache” in Apache Hadoop?

522

What is the problem with small files in Apache Hadoop?

538

What is Rack Awareness in Apache Hadoop?

542

Explain Erasure Coding in Apache Hadoop?

507

What is Disk Balancer in Apache Hadoop?

566

Post New Apache Hadoop Questions

Un-Answered Questions { Apache Hadoop }

What is difference between split and block in hadoop?

1185

What is IdentityMapper?

763

Explain what is the purpose of RecordReader in Hadoop?

558

What is the sequencefileinputformat in hadoop?

526

Is hadoop required for data science?

498

Define fault tolerance?

484

What is Hadoop Custom partitioner ?

832

Explain use cases where SequenceFile class can be a good fit?

773

How to come out of the insert mode?

518

Explain the hadoop configuration files at present?

462

How will you make changes to the default configuration files?

665

What is the difference between hadoop and other data processing tools?

496

What is partioner in hadoop? Where does it run,mapper or reducer?

509

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

832

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

603

For More Un-Answered { Apache Hadoop } Questions Click Here