Question:- Define standalone mode in HBase?
Answer:- It is a default mode of HBase. In standalone mode, HBase does not use HDFS—it uses the local filesystem instead—and it runs all HBase daemons and a local ZooKeeper in the same JVM process.
Question:- What is decorating Filters?
Answer:- It is useful to modify, or extend, the behavior of a filter to gain additional control over the returned data.
Question:- What is the full form of YCSB?
Answer:- YCSB stands for Yahoo! Cloud Serving Benchmark.
Question:- What is the use of YCSB?
Answer:- It can be used to run comparable workloads against different storage systems.
Question:- Which operating system is supported by HBase?
Answer:- HBase supports those OS which supports java like windows, Linux.
Question:- What is the most common file system of HBase?
Answer:- The most common file system of HBase is HDFS i.e. Hadoop Distributed File System.
Question:- Define Pseudodistributed mode?
Answer:- A pseudodistributed mode is simply a distributed mode that is run on a single host.
Question:- What is regionserver?
Answer:- It is a file which lists the known region server names.
Question:- Define MapReduce.
Answer:- MapReduce as a process was designed to solve the problem of processing in excess of terabytes of data in a scalable way.
Question:- What are the operational commands of HBase?
Answer:- Operational commands of HBase are Get, Delete, Put, Increment, and Scan.
Question:- Which code is used to open the connection in Hbase?
Answer:- Following code is used to open a connection: Configuration myConf = HBaseConfiguration.create(); HTableInterface usersTable = new HTable(myConf, “users”);
Question:- Which command is used to show the version?
Answer:- Version command is used to show the version of HBase. Syntax – hbase> version
Question:- What is use of tools command?
Answer:- This command is used to list the HBase surgery tools.
Question:- What is the use of shutdown command?
Answer:- It is used to shut down the cluster.