1. In C#, a class can

inherit from multiple classes.

only have one subclass.

implement multiple interfaces.

only implement one interface.

2. Which of the following is NOT the major feature in OOP (Objected-Oriented Programming)?

Encapsulation

Inheritance

Polymorphism

Generic

3. Which keyword is used to prevent a class from being inherited?

abstract

sealed

virtual

new

4. Which of the following is TRUE in C#?

In subclass, user can add new fields as well as deleting fields from superclass.

Methods declared as abstract don't have method body

Classes defined sealed can be inherited.

A superclass cannot have a superclass.

A base class can only be inherited once.

5. Which of the following is TRUE for an abstract class?

All methods in an abstract class must define as abstract

All methods in an abstract class cannot be implemented.

Static method cannot be defined as abstract.

Sealed keyword can be used for an abstract method.