A web information system uses (1) the web browser to deliver services, (2) the web server to process requests, and (3) the Internet to communicate between clients and servers. Such a system is built on top of other software systems: …
What is a Queue? In English, a queue is a waiting line. In Computer Science, a queue is a collection where elements are added on one end (the rear) but removed from the other end (the front). Queue elements are …
Twitter’s social network is a directed graph structure, where each user follows some other users. Here we consider two tasks: Random walk: Starting from one user, find a random friend, and continue … Common friends: Find common friends of two …
What is a Stack? In English, a stack is a pile of objects. In Computer Science, a stack is a linear collection which allows adding or removing elements from the same end (the top). Stack elements are processed in a …