Unit 3A - Programming

A variable is to be used to represent a person's first name. Which of the following is the most appropriate data type for this variable?

• Boolean

• String

• Number

• List

A variable is to be used to represent the state of a switch. The switch can be in one of two states: on or off. Which of the following is the most appropriate data type for this variable?

• Boolean

• String

• Number

• List

A variable is to be used to represent a person's height in inches. Which of the following is the most appropriate data type for this variable?

• Boolean

• String

• Number

• List

Consider the following code segment.

x ← 8

y ← 9

z ← 7

x ← y

z ← x

DISPLAY (z)

What is displayed as a result of executing the program?

Consider the following code segment.

bob ← 12

jane ← 8

jane ← bob

bob ← 10

DISPLAY (bob)

DISPLAY (jane)

What is displayed as a result of executing the program?

• 10 10

• 10 12

• 12 8

• 10 8

Which of the following are benefits of using descriptive variable names?

• The code will compile faster.

• The variables will use less memory

• The program will be easier to read and understand

• The program will be easier to debug and maintain

Which of the following values would be best represented as a Boolean value?

• The roll of a die

• The flip of a coin

• A card drawn from a deck

• A player's score

Consider the this code segment. Which of these could replace <missing code> so that the program displays "x" when executed?

• 
• 
• 
• 

Which of the following are benefits of using data abstractions?

• Data abstractions manage complexity in programs.

• Data abstractions make programs easier to develop and maintain.

• Data abstractions make data more secure.

• Data abstractions use less memory.

Consider the following list.

[12, 15, 8, 7, 2, 9]

The variable num is assigned the element with an index of 3. What is the value of num?