Apache HDFS Hadoop Distributed File System Interview Questions
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What is HDFS?

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Why HDFS?

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How to Delete file from HDFS?

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How to keep files in HDFS?

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How is NFS different from HDFS?

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Why is block size large in Hadoop?

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Distinguish HDFS Block and Input Unit?

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

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

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Does the HDFS go wrong? If so, how?

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

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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?

1

How to read file in HDFS?

1

When NameNode enter in Safe Mode?

1


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

What is the difference between NAS and HDFS?

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

1


What do you mean by metadata in HDFS?

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What are the main hdfs-site.xml properties?

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What does hdfs mean?

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How would you import data from MYSQL into HDFS ?

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What is the difference betwaeen mapreduce engine and hdfs cluster?

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What is the module in HDFS?

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What do you mean by the high availability of a namenode?

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

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How to read file in HDFS?

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Explain NameNode and DataNode in HDFS?

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Why is Reading done in parallel and writing is not in HDFS?

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Distinguish HDFS Block and Input Unit?

1