CodeHS Programming Review

Which of the following commands is a valid Karel command?

• move

• move;

• move();

• move()

Why is the following command an invalid Karel command?

turnleft();

• It should end in a colon rather than a semicolon

• The l should be a capital L

• It should start with a capital T

• This command is correct

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

• function turnRight() { turnLeft();

  turnLeft();

  turnLeft(); }

• function turnRight() { turnRight();

  turnRight();

  turnRight(); }

• function turnRight { turnLeft();

  turnLeft();

  turnLeft(); }

• turnRight function() { turnLeft();

  turnLeft();

  turnLeft(); }

Why do we use functions in Karel programs?

• Break down our program into smaller parts

• Avoid repeating code

• Make our program more readable

• All of the above

If Karel starts at Street 1 and Avenue 1, facing East, where will Karel be, and what direction will Karel be facing after running the following code? (Assume the world is 10x10 in size)

• Street 3, Avenue 1, Facing North

• Street 1, Avenue 4, Facing North

• Street 1, Avenue 3, Facing South

• Street 1, Avenue 3, Facing North

Karel starts at Street 1 and Avenue 1, facing East. After calling the stairStep function twice, where will Karel be and what direction will Karel be facing? (assume this is a SuperKarel program and the world is 10x10 in size)

• Street 2, Avenue 2, Facing North

• Street 3, Avenue 3, Facing East

• Street 3, Avenue 3, Facing West

• Street 4, Avenue 4, Facing East

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

• Called 1 time, defined 1 time

• Called 1 time, defined 3 times

• Called 3 times, defined 1 time

• Called 3 times, defined 3 times

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?

for (var i = 0, i < 10, i + 1) { move(); }

I. The for loop uses commas instead of semicolons

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

• I

• II

• I and II

• The for loop is correct.