I. Introduction
Node Classification is a basic task in graph-structure data. A graph-structure data comprises nodes (vertices) and links (edges). A simple undirected graph ‘G’ is described by , in which represents the set of nodes, and ‘E’ is the set of relationships or links between the nodes. Many real-world data are naturally represented in a graph, such as, in a recommender system, products and customers can be considered nodes or vertices. The relationships between the purchased product and the customer are the edges or links. By using a graph, we can draw the spending habits of customers. Furthermore, a node of a graph can have attributes of features. For example, a customer has features like gender and age and product features like size and price. Other system like Social Networks [1], Physical Network [2], Traffic [3], Natural Language Processing [4], and so on are also represented as huge graphs.