HBase DATA-SCIENCE-OPTIMIZE Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   An HBase cluster is experiencing uneven load distribution, with some RegionServers handling many more requests than others. The team suspects that the row key design is causing hot-spotting. Which change is most likely to improve load distribution?

   • AAdd a salt prefix to the row key
   • BIncrease the number of column families
   • CIncrease the MemStore flush size
   • DEnable BlockCache for the table
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   Which HBase shell command retrieves a specific cell value?

   • Ascan 'table_name'
   • Bselect 'table_name', 'row_key'
   • Cfetch 'table_name', 'row_key'
   • Dget 'table_name', 'row_key'
   Reveal Solution Discussion Select an answer first
4. 13application · medium

   An HBase cluster is being set up for a production workload. The team wants to ensure high availability and automatic failover. Which set of components is essential for this setup?

   • AMultiple HMaster nodes and a ZooKeeper ensemble
   • BHDFS NameNode and DataNodes only
   • CMultiple RegionServers and a single ZooKeeper node
   • DA single HMaster and multiple RegionServers
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   What is a key consideration when configuring column families in HBase?

   • ADefine column families after inserting data to adapt to changing needs.
   • BStore all columns in a single column family regardless of access patterns.
   • CUse as many column families as possible to maximize flexibility.
   • DKeep the number of column families small, typically one or two, to optimize performance.
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   What is the primary function of the HMaster in HBase architecture?

   • AManaging and coordinating RegionServers, including region assignment and failover.
   • BMaintaining the ZooKeeper ensemble for cluster coordination.
   • CServing read and write requests directly to client applications.
   • DStoring the actual data files (HFiles) on HDFS.
   Reveal Solution Discussion Select an answer first