Answer / Rukhsar Khatoon

HBase is a NoSQL database built on top of HDFS, providing real-time read/write access to large datasets. While both store data in HDFS, HBase offers column-oriented storage, row-level locking, and automatic sharding, which are not natively supported by HDFS.n

Replication causes data redundancy and consume a lot of space, then why is it pursued in hdfs?

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

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Why HDFS stores data using commodity hardware despite the higher chance of failures?

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How can one copy a file into HDFS with a different block size to that of existing block size configuration?

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How data or file is read in HDFS?

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Can multiple clients write into a Hadoop HDFS file concurrently?

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What is active and passive NameNode in HDFS?

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Why do we need hdfs?

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Explain how are file systems checked in hdfs?

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Why rack awareness algorithm is used in hadoop?

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

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how does hdfs ensure data integrity of data blocks stored in hadoop hdfs?

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