In the following code:

var MAX_NUMBER = 10;

function sum(x, y){
    var result = x + y;

    //Point A

    return result;
}

function start(){
    var num1 = Randomizer.nextInt(0, MAX_NUMBER);
    var num2 = Randomizer.nextInt(0, MAX_NUMBER);
    println( sum(num1, num2) );
}
Which variables exist at point A? In other words, which variables are in scope at point A? Which variables could you type at point A and the program would still work?

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)

move();
turnLeft();
putBall();
turnLeft();
turnLeft();
turnLeft();
move();
turnLeft();

Why does a programmer indent their code?

In the following code, we create a circle and add it to the screen. What is the meaning of the x variable?

var x = 20;
var circle = new Circle(x);
add(circle);

What is printed by the following program?

var isRaining = false;
var isCloudy = false;
var isSunny = !isRaining && !isCloudy;

var isSummer = false;
var isWarm = isSunny || isSummer;

println("Is it warm: " + isWarm);

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?

for (var i = 0; i < 3; i++) {
    if (ballsPresent()) {
        takeBall();
    } else {
        putBall();
        putBall();
    }
}

The following program should draw a circle on the screen

1    function start(){
2        var circle = new Circle(40);
3        circle.setPosition(getWidth() / 2, getHeight() / 2);
4        circle.setColor(Color.blue);
5    }
But when we run this code, we don’t see the circle. What is missing from our start function?

How can we determine if ball’s left edge is hitting a different shape on our canvas named box?

You are splitting up all of your apples equally between 3 people. Which statement below will calculate how many apples will be left over?

We want to simulate constantly flipping a coin until we get 3 heads in a row. What kind of loop should we use?

What is printed by the following program?

var numApples = 10;
var numOranges = 5;

if(numApples < 20 || numOranges == numApples){
    println("Hello, we are open!");
} else {
    println("Sorry, we are closed!");
}

println("Sincerely, the grocery store");

The following code continually asks the user for a password until they guess the correct password, then ends. But there is one problem.

1    var SECRET_PASSWORD = "karel";
2
3    function start(){
4        while(true){
5            var password = readLine("Enter your password: ");
6            if(password == SECRET_PASSWORD){
7                println("You got it!");
8            }
9            println("Incorrect password, please try again.");
10       }
11    }
Which of the following will fix this program?

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?

Which of the following describes a task effectively broken into smaller parts?
I. Making a list of your favorite colors
II. Throwing a dinner party by making a guest list, buying ingredients, and cooking food
III. Comparing the syntax of Python and JavaScript

How many circles of radius 10 will fit vertically stacked in a window that has height 100? The circles should not overlap, the bottom of one circle should touch the top of the next circle.

How many times will the following program print "hello"?

var i = 0;
while(i < 10){
    println("hello");
}

In the following code:

var size = 20;
var x = 100;
var y = 200;
var ball = new Circle(size);
ball.setPosition(x, y);
What is the meaning of the x variable?

Consider the following program code, where hours is an input from the user.

if(hours <= 12){
    println("Good morning!");
} else if(hours < 16){
    println("Good afternoon!");
} else {
    println("Hello!");
}
Of the following choices, select the value for hour that would cause this program to print “Good Afternoon!”

Which of the following statements will call the function paint every time the mouse is moved?

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)

function stairStep() {
    move();
    turnLeft();
    move();
    turnRight();
}

What is printed by the following program?

function printNumbers(two, one, zero){
    println(two);
    println(one);
    println(zero);
}

function start(){
    var zero = 0;
    var one = 1;
    var two = 2;
    printNumbers(zero, one, two);
}

Say you want to write a program to have Karel put down 300 tennis balls. Which control structure would you use?

What is the value of the boolean variable canVote at the end of this program?

var age = 17;
var isCitizen = true;
var canVote = age >= 18 && isCitizen;

What is the last thing printed by the following program?

var start = 30;
var stop = 10;
for(var i = start; i >= stop; i-=5){
    if(i % 2 == 0){
        println(i * 2);
    } else {
        println(i);
    }
}

The following program animates a ball by setting a timer to move the ball across the screen. We want the animation to stop whenever the user clicks the mouse:

var ball;

function start(){
    ball = new Circle(40);
    add(ball);
    setTimer(draw, 20);
    mouseClickMethod(stopAnimation);
}

function draw(){
    ball.move(2, 2);
}

function stopAnimation(e){
    //your code here
    ...
}
Which statement would stop the animation in this program?

Why do we use functions in Karel programs?

Which of the following successfully switches the values of the variables x and y? The var temp may be used as a temporary variable if necessary.

“It’s a bird! It’s a plane! No, it’s Superman!”
We want to write a function isSuperman that takes in two parameters isBird and isPlane and returns true if it is in fact Superman, and false otherwise.
If it’s not a bird and it’s not a plane, it must be Superman.
Which of the following functions is the correct implementation of isSuperman?

We want to position a Circle circle on our canvas to be at a random position, but we want to keep the entire shape on the screen. Which of the following will accomplish this?

What makes the following command an invalid Karel command?
turnleft();

In a graphics canvas, what are the coordinates of the bottom right corner of the window?

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

What is the total number of times Karel moves when the code below is run?

function moveForward() {
    for(var i = 1; i < 5; i++) {
        move();
    }
}

moveForward();
moveForward();

In the following function printThreeTimes:

function printThreeTimes(word){
    println(word);
    println(word);
    println(word);
}
What is the parameter of the function?

What does this program do?

var ball;

function start(){
    ball = new Circle(40);
    add(ball);
    setTimer(draw, 20);
}

function draw(){
    ball.move(2, 2);
}

What is the output of the following program?

function start(){
    var x = 5;
    sumTo(x);
    println(x);
}

function sumTo(num){
    var sum = 0;
    for(var i = 0; i <= num; i++){
        sum += i;
    }
    println(sum);
}

In the following code snippet:

function addTen(x){
    var ten = 10;
    var result = x + ten;
    return result
}

function double(x){
    var result = 2*x;
    return result;
}
What are the local variables of the function double?

How many total times will Karel move in this program?

function start() {
    move();
    for (var i = 0; i < 5; i++) {
        move();
        putBall();
    }
}

The following program adds several shapes to the screen.

function addShapes(){
    //code that fills the screen with shapes
    //don't worry about how it's implemented
    ...
}

function start(){
    addShapes();
    mouseClickMethod(removeShape);
}
We want to write a function that will remove any shape the user clicks on. Which of the following is the best implementation of the function removeShape?

What is the output of the following program?
var result = 0;
var max = 5;
for(var i = 0; i < max; i++){
    result += i;
}
println(result);

Karel the Dog is instructed to move forward two spaces. Then, if Karel is standing on a ball, Karel will turn left and move forward two spaces. Otherwise, Karel will turn around and move forward two spaces. Given the starting point below, where will Karel end up?
Starting Point:

What will be the output of the following program?

var circle = new Circle(100);
circle.setPosition(getWidth()/2, 0);
circle.setColor(Color.blue);
add(circle);

How many parameters go into the function sum, and how many return values come out of the function sum?

function sum(first, second, third){
    var result = first + second + third;
    println(first);
    println(second);
    println(third);
    return result;
}

The difference between local variables and global variables is:

Karel starts at Street 1, Avenue 1, facing East in a 5x5 world. What will happen after this code runs?

move();
putball();
move();
move();
move();
move();
move();

What will the following program do when run?

var number = readLine("Enter a number: ");
println("Number is: " + number);

In the following code:

function start(){
    mouseUpMethod(paint);
}

function paint(e){
    //code to paint something on the canvas
    ...
}
What is the meaning of e?

What does the mystery function do?

function mystery() {
    while (noBallsPresent()) {
        move();
    }
}

In a graphics canvas, what are the coordinates of the center of the window?

Choose the correct logical operator to fill in the blank in the if statement. You may assume that the variable ‘age’ has already been initialized.