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?

997

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

935

What is HDFS High Availability?

919

What are different types of filesystem?

1091

how can we change Replication Factor?

978

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

845

What are the core components of Apache Hadoop?

712

What is the difference between Apache Hadoop and RDBMS?

736

How is security achieved in Apache Hadoop?

833

What is Apache Hadoop?

800

What is a “Distributed Cache” in Apache Hadoop?

723

What is the problem with small files in Apache Hadoop?

725

What is Rack Awareness in Apache Hadoop?

745

Explain Erasure Coding in Apache Hadoop?

692

What is Disk Balancer in Apache Hadoop?

798

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Un-Answered Questions { Apache Hadoop }

Can Apache Kafka be used without Zookeeper?

970

How to use Apache Zookeeper command line interface?

1060

What does the command mapred.job.tracker do?

717

What is your favourite tool in the hadoop ecosystem?

918

What is the main purpose of HDFS fsck command?

1717

What are the two main parts of the hadoop framework?

603

What are the characteristics of hadoop framework?

616

Define tasktracker.

600

What is the use of combiners in the hadoop framework?

578

what should be the ideal replication factor in hadoop?

611

Data Engineer Given a list of followers in the format:123, 345234, 678345, 123â€¦Where column one is the ID of the follower and column two is the ID of the followee. Find all mutual following pairs (the pair 123, 345 in the example above). How would you use Map/Reduce to solve the problem when the list does not fit in memory?

704

what is the default replication factor in HDFS?

974

What is cloudera and why it is used?

755

What is salary of hadoop developer?

632

What is Input Split in hadoop?

918

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