There are three different types of constraints typically captured in object-oriented design: preconditions, postconditions, and _____________.
A) regular conditions
B) guard conditions
C) exception handling
D) invariants
E) contracts

Question

Quizplus · Accepted Answer

The missing type of constraint is invariants. Invariants are conditions that should always hold true for an object throughout its lifetime, regardless of any actions or changes made to it. Preconditions are conditions that must be met before an action can be performed, while postconditions are conditions that must be true after an action has been performed. Guard conditions are used to check if an object's state or input parameters meet certain criteria before performing an action. Exception handling refers to the process of catching and handling errors or exceptions that may occur during the execution of a program. Contracts are a broader concept that encompasses all types of constraints and expectations placed on an object or function.

There Are Three Different Types of Constraints Typically Captured in Object-Oriented