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?

181

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

140

How to read file in HDFS?

When NameNode enter in Safe Mode?

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

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

What is NameNode and DataNode in HDFS?

What is a block in HDFS? what is the default size in Hadoop 1 and Hadoop 2? Can we change the block size?

Why HDFS performs replication, although it results in data redundancy?

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

How data or file is read in HDFS?

Explain the hdfs architecture?

What is secondary namenode?

What is active and passive NameNode in HDFS?

226

How data or file is written into Hadoop HDFS?

What do you mean by meta information in hdfs?

Compare hbase vs hdfs?

Explain hdfs?

How would you import data from MYSQL into HDFS ?

Why is block size set to 128 MB in HDFS?

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