Consider the statement: "A student is either a postgraduate student or an undergraduate student." Assuming that student and postgraduate student and undergraduate student to be classes, what can be said about the relationship between student and undergraduate student?

if a project is already delayed , then adding manpower to complete it at the earliest would be :

In the design of a certain system, suppose all error handling functions have been put in a module, then the module will have which one of the following types of cohesion?

In a Safety-Critical Software System, requirements R1–R5 are mapped to test cases T1–T4 as follows:

A library automation software is to be designed. Before a book can be issued, it needs to be checked whether the book has been reserved by any user. Which one of the following mechanisms is most appropriate to factor this use case into issue book and check reservation use cases?