HBase DATA-SCIENCE-OPTIMIZE Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which of the following is a key characteristic of HBase as a NoSQL database?

   • AIt is optimized for online transaction processing (OLTP) with ACID transactions across multiple rows.
   • BIt is a key-value store that only supports simple get and put operations without any advanced features.
   • CIt is a column-oriented database that stores data in column families, allowing flexible and sparse rows.
   • DIt stores data in a fixed schema with rows and columns defined by a strict relational model.
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2. 22application · medium

   A data engineering team wants to run SQL-like queries on data stored in HBase without moving the data to another system. They are already using Hive for other batch processing. Which approach is the most straightforward?

   • ACreate an external Hive table that maps to the HBase table using the HBase storage handler
   • BUse MapReduce to convert HBase data to Parquet and then query with Hive
   • CExport the HBase table to HDFS as a text file and create a Hive table over it
   • DUse HBase shell to run SQL queries
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4. 23foundation · easy

   Which HBase shell command is used to create a new table?

   • Aput 'table_name', 'row_key', 'column', 'value'
   • Balter 'table_name', 'column_family'
   • Ccreate 'table_name', 'column_family'
   • Dadd 'table_name', 'column_family'
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5. 24foundation · easy

   Which component in HBase architecture is responsible for serving read and write requests for data?

   • ARegionServer
   • BHDFS NameNode
   • CHMaster
   • DZooKeeper
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6. 25foundation · easy

   What is the function of the MemStore in HBase?

   • AIt caches frequently read data to speed up read operations.
   • BIt stores table metadata for the HMaster.
   • CIt logs all write operations for recovery purposes.
   • DIt stores data in memory before being flushed to HFiles on disk.
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