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

Apache HDFS Hadoop Distributed File System Interview Questions

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What is hdfs block size?

How hdfs is different from traditional file systems?

How is hdfs block size different from traditional file system block size?

How data or a file is written into hdfs?

What is a namenode in hadoop?

What is secondary namenode?

What do you mean by meta data in hdfs? List the files associated with metadata.

Explain the hdfs architecture and list the various hdfs daemons in hdfs cluster?

Can you modify the file present in hdfs?

Define data integrity?

What do you mean by the high availability of a namenode? How is it achieved?

Hdfs stores data using commodity hardware which has higher chances of failures. So, how hdfs ensures the fault tolerance capability of the system?

Define hadoop archives?

What is secondary namenode? Is it a substitute or back up node for the namenode?

What is the command for archiving a group of files in hdfs.

Un-Answered Questions { Apache HDFS Hadoop Distributed File System }

What are file permissions in HDFS and how HDFS check permissions for files or directory?

What do you mean by metadata in HDFS?

List the files associated with metadata in hdfs?

What is hdfs in big data?

How data or file is read in HDFS?

What is the difference between nas (network attached storage) and hdfs?

What is NameNode and DataNode in HDFS?

How data or file is written into Hadoop HDFS?

Tell me two most commonly used commands in HDFS?

Why do we need hdfs?

What is active and passive NameNode in HDFS?

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Mention what is the difference between hdfs and nas?

What are the main properties of hdfs-site.xml file?

Why is block size large in Hadoop?

How to read file in HDFS?

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