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?

185

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

146

How to read file in HDFS?

When NameNode enter in Safe Mode?

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

How to restart NameNode or all the daemons in Hadoop HDFS?

What is the throughput?

While processing data from hdfs, does it execute code near data?

What is the throughput? How does hdfs give great throughput?

How to format the HDFS? How frequently it will be done?

Why do we need hdfs?

Why does hive not store metadata information in hdfs?

What are the main features of hdfssite.xml?

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

146

How is indexing done in Hadoop HDFS?

How does hdfs get a good throughput?

Explain what is difference between an input split and hdfs block?

What is the procedure to create users in HDFS and how to allocate Quota to them?

How does a client read/write data in HDFS?

What is a block in Hadoop HDFS? What should be the block size to get optimum performance from the Hadoop cluster?

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