Unit 2 Knowledge Test Make Up

Which of the following is the correct way to define a turnRight function in Karel?

• 
• 
• 
• 

In this code, how many times is the dance function called and how many times is it defined?

• Called 3 times, defined 3 times

• Called 1 time, defined 1 time

• Called 1 time, defined 3 times

• Called 3 times, defined 1 time

What is wrong with this for loop?

I. The for loop uses commas instead of semicolons

II. It should say i++ instead of i + 1

• I

• II

• I and II

• The loop is correct.

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

• {This is a comment}

• // This is a comment

• /* This is a comment

• This is a comment

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()

How can we teach Karel new commands?

• 
  

  For loop

• While loop

• The start function

• Define a new function

How can we improve the following program?

• Fix the indentation of this program

• Use a while loop to repeat the move command

• Break down this program into more functions

• Use a for loop to repeat the move command

In the following code below from the Tower Builder example, what is the purpose of the For Loop?

• To move and build a tower.

• To put a ball and move then turn around around, go down and turn left.

• To put a ball and move.

• To put a ball and move three times.

In the following code, what would be a good Postcondition to write?

• Karel ends one spot above a tennis ball facing East.

• Karel is on the same position but on top of a ball.

• Karel is on a spot with a tennis ball facing north

• Karel is facing East.

How many total times will Karel move in this program?

• 1

• 5

• 6

• 7