Thompson Rivers University

Question 1

Lab 2 Polymorphism - SM 2025

If the class Utensil is declared as abstract, with Fork, Knife, and Spoon as its child classes, are the following declarations legal? Why or why not?

1. Utensil myFork;
2. Utensil mySpoon = new Utensil();
3. Knife myKnife = new Utensil();
4. Spoon mySpork = new Fork();

You're told that Utensil is an abstract class, and that Fork, Knife, and Spoon are classes that extend Utensil.

Members only

Keep reading this lesson

You've reached the end of the free preview. Unlock the rest of this lesson plus 54 more lessons in Thompson Rivers University.

Unlimited coding questions
Unlimited access to all classroom material
Weekly live call for questions and guidance
3,000 AI tutor tokens / month
Personal SQL database (3 MB)
Progress tracking

Unlock everything — $29/month Already a member? Sign in

Cancel any time.