Java Semester Test

Which of the following is not a valid condition to go in an if statement for Karel?

• ballsPresent()

• frontIsClear()

• leftIsBlocked()

• turnLeft()

Say Karel is on a location with one tennis ball. After the following code runs, how many tennis balls will there be at that location?

• 0

• 1

• 2

• 6

What condition should be used in this while loop to get Karel to pick up all the tennis balls on the current location?

• noBallsPresent()

• ballsPresent()

• frontIsClear()

• takeBall()

Why does a programmer indent their code?

• Helps show the structure of the code.

• Easier for other people to understand.

• A key part of good programming style!

• All of the above

Say you want to write a program to have Karel put down 300 tennis balls. Which control structure would you use?

• If Statement

• While Loop

• For Loop

• Nested While Loop

What is the output of the following program: (Assume the user enters ‘Florence’ then ‘Fernandez’.)

• Fernandez Florence

• Fernandez

  Florence

• FlorenceFernandez

• Florence Fernandez

Which of the following choices is a properly formed JavaScript variable name, meaning it is both legal in the JavaScript language and considered good style?

• user_age

• UserAge

• userAge

• User age

What is printed to the screen when the following program is run?

var num = 13 % 3;

println(num);

• 1

• 2

• 3

• 4

What is the meaning of the x variable?

• The x coordinate of the center of the circle

• The x coordinate of the left edge of the circle

• The radius of the circle

• The position of the circle

What will be printed from the following:

var x = 4 * 3 + 2 / 5;

println(x);

• 12

• 12.4

• 4

• 13.6