Want to know:
An exclusive or (XOR) constraint states thatA. an attribute cannot have null values.B. an attribute must either be null or can only have one of two values.C. instances of only one of two classes can be related to instances of another class.D. two classes cannot be related by an association class.
Get a detailed, AI-powered explanation for this question and thousands more on StudyFetch.
Get the Answer for FreeHow StudyFetch Helps You Master This Topic
AI-Powered Answers
Get instant, detailed explanations powered by AI that understands your course material.
Deep Understanding
Go beyond surface-level answers with step-by-step breakdowns and examples.
Personalized Learning
Spark.E adapts to your learning style and helps you connect ideas.
Practice & Test
Turn any question into flashcards, quizzes, and practice tests to solidify your knowledge.
Explore More Questions
- In the Model-View-Controller (MVC) architectural pattern, the Model represents§ the objects used to render data in the user interface.§ the process control mechanism used by the system.§ the controls with which the user interacts.§ the data viewed and manipulated by the user.§ the business logic of the application.
- Risk analysis is introduced in which software development process?§ Waterfall§ Prototyping§ Agile§ Phased-release§ Spiral
- What are two options to migrate enterprise-local data to a cloud data center?