Answer / Amit Kumar Harbola

ZooKeeper is a centralized service used by Apache HBase for maintaining configuration information, naming, providing distributed synchronization and shared semaphore services among other distributed applications.

What happens if you alter the block size of a column family on an already occupied database?

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Mention what are the three types of tombstone markers in hbase?

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What services run after running hbase job?

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Which command is used to show the current hbase user?

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Which technique can you use in hbase to access hfile directly without the help of hbase?

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State some applications of HBase?

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What are the main key structures of hbase?

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What are the different types of tombstone markers in HBase for deletion?

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Suppose that your data is stored in collections, for instance, some binary data, message data or metadata is all keyed on the same value. Will you use HBase for this?

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What happens when you issue a delete command in hbase?

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What is the role of zookeeper in hbase?

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What is wal and hlog in hbase?

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