B CompE Bachelor of Computer Engineering Bachelor of Computer Engineering Object Oriented Programming 3

Question 1

What problem does the 'diamond problem' describe in OOP?

Accepted Answer

Ambiguity when a class inherits from two classes that share a common ancestor

Answer

The diamond problem arises in multiple inheritance when two parent classes derive from the same base, creating ambiguity about which version of a member to inherit.

Question 2

Which access modifier in Java makes a member accessible only within its own package and by subclasses?

Accepted Answer

protected

Answer

The 'protected' modifier allows access within the same package and by subclasses in any package, making it broader than private but narrower than public.

Question 3

What is method overloading?

Accepted Answer

Defining multiple methods in the same class with the same name but different parameter lists

Answer

Overloading is compile-time polymorphism where the compiler selects the correct method based on the number or types of arguments provided.

Question 4

In the context of design patterns, what category does the Singleton pattern belong to?

Accepted Answer

Creational

Answer

Singleton is a Creational pattern because it controls the creation process, ensuring only one instance of a class exists.

Question 5

What does 'composition over inheritance' mean as a design guideline?

Accepted Answer

Prefer building complex behavior by combining objects rather than extending class hierarchies

Answer

Composition over inheritance advocates assembling behavior from loosely coupled components, yielding greater flexibility and avoiding brittle class hierarchies.

B CompE Bachelor of Computer Engineering Practice Test

B CompE Bachelor of Computer Engineering Practice Test

B CompE Bachelor of Computer Engineering Bachelor of Computer Engineering Object Oriented Programming 3