CMPS 280 Exam 2

Question 1

Describe the Tail Recursion type.

Answer 1

There is no code after the recursion call

Question 2

Describe the Non-Tail Recursion type.

Answer 2

There is code after the recursion call.

Question 3

Describe the Indirect Recursion type.

Answer 3

Method calls another method, which eventually calls original method again.

Question 4

What is the toString() method?

Answer 4

Returns a string representation of the object.

Automatically gets called when you print out the reference to the object.

Question 5

What is polymorphism?

Answer 5

Poly, meaning many, and Morphism meaning change.

A reference of a parent can refer to ANY of it’s children, grandchildren, etc.

Question 6

What is encapsulation?

Answer 6

allow controlled access to private attributes via public methods.

Question 7

A class in Java can inherit from (extend)…

Answer 7

Exactly one parent class

Question 8

What is an Object?

Answer 8

(in java) is at java’s hierarchy top and so it can refer to anything.