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 the problem in having lots of small files in hdfs?

Why rack awareness algorithm is used in hadoop?

Can you change the block size of hdfs files?

Explain about the indexing process in hdfs?

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

Replication causes data redundancy then why is pursued in hdfs?

Since the data is replicated thrice in hdfs, does it mean that any calculation done on one node will also be replicated on the other two?

If a particular file is 50 mb, will the hdfs block still consume 64 mb as the default size?

What is the difference between an hdfs block and input split?

Explain hdfs?

Explain the key features of hdfs?

How does hdfs get a good throughput?

Explain how indexing is done in hdfs?

Explain the difference between mapreduce engine and hdfs cluster?

Explain the difference between an hdfs block and input split?

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

What happens if the block in HDFS is corrupted?

What is the difference between Input Split and an HDFS Block?

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

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What is a task tracker?

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

Why is block size set to 128 MB in Hadoop HDFS?

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

Is namenode also a commodity?

What are file permissions in HDFS? how does HDFS check permissions for files/directory?

Can multiple clients write into a Hadoop HDFS file concurrently?

Clarify the difference between nas and hdfs.

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

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

What do you mean by meta information in hdfs? List the documents related to metadata.

Explain the difference between nas and hdfs?

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