AP AP Computer Science & Technology 2

Question 1

In AP Computer Science, what is the purpose of a constructor in object-oriented programming?

Accepted Answer

To initialize a new object's state

Answer

A constructor is a special method called when an object is created, used to initialize its attributes.

Question 2

Which sorting algorithm repeatedly swaps adjacent elements that are in the wrong order?

Accepted Answer

Bubble Sort

Answer

Bubble sort compares and swaps adjacent elements repeatedly, causing larger values to 'bubble' to the end.

Question 3

What does the term 'inheritance' mean in object-oriented programming?

Accepted Answer

A class receives properties and methods from a parent class

Answer

Inheritance allows a subclass to acquire the attributes and methods of a superclass, promoting code reuse.

Question 4

In a binary number system, what is the decimal equivalent of 1010?

Accepted Answer

10

Answer

Binary 1010 equals 1×8 + 0×4 + 1×2 + 0×1 = 10 in decimal.

Question 5

What is the primary purpose of an array in programming?

Accepted Answer

To store multiple values of the same type under one name

Answer

An array stores a collection of elements of the same data type, accessible via index positions.

AP - Advanced Placement Test Practice Test