Programming with Karel Quiz

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 Row 1 and Column 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)

move();

turnLeft();

putBall();

turnLeft();

turnLeft();

turnLeft();

move();

turnLeft();

• Row 3, Column 1, Facing North

• Row 1, Column 4, Facing North

• Row 1, Column 3, Facing South

• Row 1, Column 3, Facing North

Karel starts at Row 1 and Column 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)

function stairStep() {

move();

turnLeft();

move();

turnRight();

}

• Row 2, Column 2, Facing North

• Row 3, Column 3, Facing East

• Row 3, Column 3, Facing West

• Row 4, Column 4, Facing East

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

function main() {

move();

dance();

move();

move();

turnLeft();

dance();

dance();

}

function dance() {

turnLeft();

move();

turnLeft();

turnLeft();

move();

turnLeft(); }

main();

• 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?

function main() {

move();

go();

go(); }

function go() {

move();

move();

}

function go() {

move();

move();

}

main();

• 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?

function main() {

move();

for (let i = 0; i < 5; i++) {

move();

putBall(); }

}

main();

• 1

• 5

• 6

• 7

What does the mystery function do?

function mystery() {

while (noBallsPresent()) {

move();

}

}

• 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