Grade 12

Question 1

Member functions are:

Answer 1

used to add additional functions to a class

Question 2

What are Static members?

Answer 2

Defines unchanging values In objects

Question 3

Instance Variables are:

Answer 3

a variable defined for an instance in a class.

Question 4

What is an object?

Answer 4

Object: an instance of a class that manipulates methods

Question 5

What is a parameter?

Answer 5

Parameter: a variable used to add inputed data to the function

Question 6

What methods can’t be overridden?

Answer 6

-privet methods
-static methods
-final methods

Question 7

Abstract classes are?

Answer 7

Classes that cannot create objects but only inherit them, they can have abstract/non abstract methods.

Question 8

Dynamic binding is?

Answer 8

Dynamic binding: creates the objects of a base class but creates it with different derived classes. You cannot instantiate concret objects.

Question 9

Keyword to override compilers rules

Answer 9

.super()

Question 10

Can Static methods be overridden (T or F)

Answer 10

False

Question 11

Redifining methods that a subclass would inherit is called

Answer 11

Overriding

Question 12

What is interface?

Answer 12

Interface: is similar to a class, but all methods must be abstract and all objects must be static or final variables

Question 13

4 rules for abstract classes?

Answer 13

• it cannot be instantiated
• used be the keyword “abstract”
• can have constructors, static and final methods
• can have abstract or non abstract methods

Question 14

What is exception handling?

Answer 14

Exception handling: is the ability of the program to catch errors and handle them while continuing to run

Question 15

What is reoccursion?

Answer 15

Recursion: a method that makes the function call itself. Used for breaking down complicated problems down into simple problems

Question 16

What is polymorphism?

Answer 16

Polymorphism refers to classes, in which base and derived classes can have the same functions with the same names

Question 17

What is a class modifier?

Answer 17

Class modifier: is the visibility given to a function of the class
Protected
Private
Public

Question 18

What handles I/O exceptions?

Answer 18

IO Exception

Question 19

What does “Contains()” do?

Answer 19

Checks for the existence of another string

Question 20

What does “replace()” do?

Answer 20

Replaces a character in the original string