Comp Sci 2 9wks exam Review

What’s wrong with this code?

• The go function is called twice

• The go function has a syntax error

• The go function has been defined twice

• go is not a command that Karel understands

How many total times will Karel move in this program?

• 1

• 5

• 6

• 7

What is wrong with this for loop?

• A

• B

• A and B

• The for loop is correct

What is the proper format for a single line comment in Karel?

• # This is a comment

• // This is a comment

• /* This is a comment

• This is a comment

What does the mystery function do?

• Karel moves until it is on a ball

• Karel moves once if there is no ball present

• Karel moves until it puts down a ball

• Karel checks if there is no ball on the current spot and then moves once

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

• balls_present()

• front_is_clear()

• left_is_blocked()

• turn_left()

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?

• no_balls_present()

• balls_present()

• front_is_clear()

• take_ball()

Why does a programmer indent their code?

• Helps show the structure of the code.

• Easier for other people to understand.

• In Python, it is used to help determine what parts of a code are included in a code block, such as an if statement or for loop.

• All of the above

How can we teach Karel new commands?

• For loop

• While loop

• Define a new function

• The main function