JavaScript Functions Test

In the following function printThreeTimes:

function printThreeTimes(word){

println(word);

println(word);

println(word);

}

What is the parameter of the function?

• printThreeTimes

• function

• word

• println

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);

}

• 5

  15

• 15

  5

• 5

• 15

What is printed by the following program?

function product(x, y){

return x * y;

}

function difference(x, y){

return x - y;

}

function start(){

var x = 2;

var y = 5;

var value1 = product(x, y);

var value2 = difference(y, x);

var result = difference(value1, value2);

println(result);

}

• -7

• 7

• 13

• -13

Which of the following type of variable is visible everywhere in your code?

• global

• local

• integer

• string

Consider the following code snippet. What is returned and printed for the value of a?

function start(){

var a = mystery(10, 14);

var b = mystery(82, 28);

println(a);

println(b);

}

function mystery(x, y) {

if (x < y){

return x;

}else{

return y;

}

}

• 10

• 14

• 28

• 82

What does the mystery function do in the code snippet below?

function start(){

var a = mystery(10, 14);

var b = mystery(82, 28);

println(a);

println(b);

}

function mystery(x, y) {

if (x < y){

return x;

}else{

return y;

}

}

• mystery does nothing because there is a syntax error

• returns the larger of the two values passed to it

• returns the smaller of two values passed to it

• mystery does nothing because there is a logical error

Consider the following code snippet:

function mystery1(x){

var result = x + 1;

return result;

}

function mystery2(x, y){

var result = x + y;

return result;

}

function mystery3(x){

x = mystery1(x);

var result = x * x;

return result;

}

What would the following print?

var y = mystery3(11);

println(y);

• 13

• 121

• 144

• This would not print anything

Consider the code snippet:

function start(){

printNumbers(12, 17, 65);

printNumbers(1, 2, 3);

printNumbers(3, 3, 20);

}

function printNumbers(first, second, third){

println(first);

println(second);

println(third);

}

What are the parameters of the printNumbers function?

• 12, 17, 65

• 1, 2, 3

• 3, 3, 20

• first, second, third

Which of the following is the correct way to create a function in JavaScript?

• myFunction()

• function = myFunction()

• function:myFunction()

• function myFunction()

Which of the following functions will correctly return true if it is passed an odd integer value for x?

I.

function IsOdd (x) {

return (x % 2 == 1);

}

II.

functionl IsOdd (x) {

return (x / 2 == 1);

}

III.

function IsOdd (x) {

if (x % 2 == 1)

return true;

else

return false;

}

• I, II, and III

• II only

• I and II only

• I and III only