This document discusses question banks, which are collections of questions prepared for a given subject. It defines a question bank as a planned library of test items designed to fulfill certain purposes. The document outlines the characteristics, purposes, principles, and uses of question banks. It also discusses the need for question banks and how they can improve the teaching and evaluation processes by providing teachers and examiners with a pool of quality questions to assess students. Finally, it briefly touches on e-trends in question banks and the role of e-teachers in an increasingly digital educational environment.