a) Reusing existing code

b) Binding data and methods together & hiding internal details

c) Accessing base class methods

d) Overriding methods in subclasses

a) implement

b) derive

c) extends

d) inherits

a) Defining many classes

b) Using many variables

c) One function behaving differently in different classes

d) Multiple constructors in one class

a) Polymorphism

b) Inheritance

c) Abstraction

d) Encapsulation

A. get()

B. input()

C. read()

D. scanf()