There is nothing sacred about electrons being called negative charge and protons positive charge.Itâs just a convention. You, can very well call electrons as positive charge and protons as negative charge!
Single Node or Psuedo-Distributed Cluster is the one in which all the essential daemons (like NameNode, DataNode, JobTracker and TaskTracker) run on the same machine. The default replication factor for a single node cluster is 1. A single node cluster is basically used to simulate a full cluster like environment and to test hadoop applications and unlike the Stand-alone mode, HDFS is accessible in this.
Cluster is a group of numbers that are very close together. Ex. From 3-10 is a cluster of numbers. They are all in a group next to each other x x x x x x x x x x _x___x_x_x â¦ _x_x__x_x_x__x__x__x_ 1 2 3 4 5 6 7 8 9 10 11 12 13.