What does Liskov Substitution Principle ensure?

Super and subclass interchangeability

What is the difference between interfaces and abstract classes?

Interfaces have no implementation

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Object-Oriented Programming

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Test your knowledge on the principles and concepts of Object-Oriented Programming

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Questions 16

Answers

1
What does the Single Responsibility Principle state?
One reason to change
Multiple reasons to change
Only one method
No reasons to change
2
What does Liskov Substitution Principle ensure?
No class dependencies
Data encapsulation
Super and subclass interchangeability
Method overloading
3
What does encapsulation prevent?
Method overloading
Code execution
Object creation
Data modification
4
What does an interface define?
A method contract
A data structure
A class blueprint
An object instance
5
What is the purpose of garbage collection?
Reclaim unused memory
Increase memory usage
Modify existing objects
Create new objects
6
What is composition in OOP?
Is-a relationship
Has-a relationship
Method overriding
Data hiding
7
What is an abstract class?
Cannot be instantiated
Can be instantiated
Is a concrete class
Has no methods
8
What is dynamic binding?
Linking at runtime
Linking at compile time
Object destruction
Static method binding
9
What is the difference between interfaces and abstract classes?
Interfaces can be instantiated
Abstract classes are concrete
Interfaces have no implementation
Abstract classes have no methods
10
How familiar are you with OOP?
Not at all
A little
Somewhat
Very familiar!
11
What is the Open/Closed Principle?
Closed for extension
Open for extension
Closed for modification
Open for modification
12
What do design patterns provide?
Unique problems
Standard solutions
Random solutions
Complex designs
13
What is a constructor?
Defines classes
Overloads methods
Initializes objects
a type of snake
14
What does polymorphism allow?
Classes to be abstract
Data to be encapsulated
Objects to be static
Methods to act differently
15
What is the purpose of inheritance?
Hide implementation details
Promote code reusability
Create new classes only
Restrict access to data
16
How does abstraction simplify interfaces?
By reducing classes
By adding complexity
By increasing methods
By hiding details

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