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

Does hdfs enable a customer to peruse a record, which is already opened for writing?

What is the throughput?

How does hdfs give great throughput?

Will various customers write into an hdfs record simultaneously?

Clarify the difference between nas and hdfs.

What do you mean by meta information in hdfs?

Can we change the document present in hdfs?

Explain what is heartbeat in hdfs?

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

Explain how indexing in hdfs is done?

Mention what is the best way to copy files between hdfs clusters?

Mention what is the difference between hdfs and nas?

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

What is the difference between input split and hdfs block?

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

How to Delete directory and files recursively from HDFS?

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

Explain the process that overwrites the replication factors in HDFS?

What does heartbeat in hdfs means?

What is active and passive NameNode in HDFS?

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How HDFS helps NameNode in scaling in Hadoop?

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?

What are file permissions in HDFS and how HDFS check permissions for files or directory?

How to read file in HDFS?

Write command to copy a file from HDFS to linux(local).

What do you mean by meta information in hdfs?

How NameNode tackle Datanode failures in HDFS?

Can multiple clients write into an HDFS file concurrently?

Why is block size large in Hadoop?

Explain the difference between nas and hdfs?

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