Back to Questions
Want to know:
An exclusive or (XOR) constraint states that§ an attribute cannot have null values.§ an attribute must either be null or can only have one of two values.§ instances of the same class cannot be related to each other.§ instances of only one of two classes can be related to instances of another class.§ 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
- Migration Toolkits available that can help analyze and accelerate migration for many workloads moving to Containers
- The purpose of data flow testing is to ensure the correctness of valuesA. stored by a program into a database.B. that move into and out of a database.C. that pass through a user interface.D. of program variables.E. output by a program.
- Which of the following is a benefit of having a software development process?§ It is not necessary to train the developers.§ We have to gather fewer requirements from users.§ It is easier to divide up the work among development team members.§ It is not necessary to maintain the system.§ There is less need for the development team to communicate with the users.