AP Comp Std 2 Review

Which keyword is used to declare a variable in JavaScript?

• variable

• var

• int

• x

Which function is commonly used to display output on the screen in most programming languages?

• post

• PRINT

• println

• write

Examine the following JavaScript function. Which of the following values cannot be an output when the function is executed?

function start(){

var mysteryNum = 10 * Randomizer.nextInt(2,10);

console.log(mysteryNum);

}

• 20

• 30

• 10

• 90

Which function should you use to prompt the user to input text in a program?

• readln

• readLine

• text

• println

Consider the following JavaScript function:

function start(){

var loggedIn = false;

console.log("User logged in?: " + !loggedIn);

}

What will be the output when this function is executed?

• User logged in?: true

• User logged in?: false

• There is a syntax error in the code

• User logged in?: + loggedIn

Which symbol is used for multiplication in JavaScript programming?

• x

• X

• *

• #

Consider the following JavaScript program:

var result = 0;

var max = 5;

for(var i = 0; i < max; i++){

result += i;}

console.log(result);

What will be the output when this code is executed?

• 15

• 10

• 0

• 12345

Which function should you invoke to retrieve the current width of the display screen?

• width()

• getWidth()

• screenWidth()

• getScreenWidth()

Imagine you have a function named drawCircle that should be executed every time a mouse click event occurs. What is the correct way to achieve this?

• mouseClickMethod(drawCircle(e));

• if(mouseClickMethod){ drawCircle(); }

• mouseClickMethod(drawCircle);

• mouseClickMethod(drawCircle());

Consider the following JavaScript code snippet:

var number = 5;

var greater_than_zero = number > 0;

if (greater_than_zero){

console.log(number);

}

What will be the output when this code is executed?

• 0

• 5

• True

• No output will be produced