Advanced WPD Exam

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

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

function start() {

move();

dance();

move();

move();

turnLeft();

dance();

dance();

}

function dance() {

turnLeft();

move();

turnLeft(); t

urnLeft();

move();

turnLeft();

}

• 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 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?

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

A store has 20 apples in its inventory. How can you store this information in a JavaScript variable?

• var numApples == 20;

• 20 = numApples;

• var numApples = 20;

• var num apples = 20;

You want to read input from the user to know how many apples they would like to buy. Which statement should you use to read in a number from the user?

• var applesToBuy = readLine("How many apples would you like? ");

• var applesToBuy = println("How many apples would you like? ");

• var applesToBuy = readInt("How many apples would you like? ");

• var applesToBuy = nextInt("How many apples would you like? ");

If you were given the following variables:

var distance = 2;

var time = 30;

What line of code would print the speed in km/hr if the distance is given in km and the time is given in minutes? (Speed = distance/time)

• println(distance/(time/60));

• println(distance/time);

• println(distance*(time*60));

• println(distance*time);