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?

Why HDFS?

How to Delete file from HDFS?

How to keep files in HDFS?

How is NFS different from HDFS?

Why is block size large in Hadoop?

Distinguish HDFS Block and Input Unit?

What are the difference between of the “HDFS Block” and “Input Split”?

What happens when two users try to access to the same file in HDFS?

Does the HDFS go wrong? If so, how?

Why is HDFS only suitable for large data sets and not the correct tool to use for many small files?

What happens when two clients try to access the same file on HDFS?

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What are the different file permissions in the HDFS for files or directory levels?

How to read file in HDFS?

When NameNode enter in Safe Mode?

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

How does a client read/write data in HDFS?

Explain how are file systems checked in hdfs?

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

Which classes are used by the hive to read and write hdfs files?

What is Hadoop Distributed File System- HDFS?

How will you perform the inter cluster data copying work in hdfs?

Why ‘Reading‘ is done in parallel and ‘Writing‘ is not in HDFS?

Compare hbase vs hdfs?

Characterize data integrity? How does hdfs ensure information integrity of data blocks squares kept in hdfs?

How to copy file from HDFS to local?

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

How does hdfs provides good throughput?

Explain how HDFS communicates with Linux native file system?

When NameNode enter in Safe Mode?

What do you mean by metadata in HDFS? Where is it stored in Hadoop?

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