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  • Javascript Quiz

    • Javascript Quiz

    The test contains 20 questions and it's not official, it's just a nice way to see how much you know, or don't know, about Javascript.

    1.

    What is the correct way to write a JavaScript array?

    var colors = 1 = ("red"), 2 = ("green"), 3 = ("blue")
    var colors = "red", "green", "blue"
    var colors = ["red", "green", "blue"]
    var colors = (1:"red", 2:"green", 3:"blue")

    2.

    How do you round the number 7.25, to the nearest integer?

    round(7.25)
    Math.rnd(7.25)
    rnd(7.25)
    Math.round(7.25)

    3.

    How to write an IF statement in JavaScript?

    if i == 5 then
    if i = 5
    if i = 5 then
    if (i == 5)

    4.

    What is the correct JavaScript syntax for opening a new window called "w2" ?

    w2 = window.open("http://www.w3schools.com");
    w2 = window.new("http://www.w3schools.com");
    w2 = window("http://www.w3schools.com");
    w2 = open("http://www.w3schools.com");

    5.

    How to write an IF statement for executing some code if "i" is NOT equal to 5?

    if (i != 5)
    if i =! 5 then
    if (i <> 5)
    if i <> 5

    6.

    How do you call a function named "myFunction"?

    call function myFunction()
    myFunction
    myFunction()
    call myFunction()

    7.

    The external JavaScript file must contain the <script> tag.

    Neither True nor False
    Sometimes
    True
    False

    8.

    How do you find the number with the highest value of x and y?

    Math.max(x, y)
    Math.ceil(x, y)
    top(x, y)
    ceil(x, y)

    9.

    Where is the correct place to insert a JavaScript?

    The <body> section
    Before <html>
    Both the <head> section and the <body> section are correct
    The <head> section

    10.

    How does a WHILE loop start?

    while (i <= 10; i++)
    while i = 1 to 10
    while (i is 10)
    while (i <= 10)

    11.

    What is the correct syntax for referring to an external script called "xxx.js"?

    <script src="xxx.js">
    <script href="xxx.js">
    <script name="xxx.js">
    <script link="xxx.js">

    12.

    What is the correct JavaScript syntax to change the content of this html element <p id="demo">This is a demonstration.</p>

    document.getElementById("demo").innerHTML = "Hello World!";
    #demo.innerHTML = "Hello World!";
    document.getElementByName("p").innerHTML = "Hello World!";
    document.getElement("p").innerHTML = "Hello World!";

    13.

    How does a FOR loop start?

    for (i <= 5; i++)
    for (i = 0; i <= 5; i++)
    for i = 1 to 5
    for (i = 0; i <= 5)

    14.

    How do you create a function in JavaScript?

    function = myFunction()
    function:myFunction()
    function ()
    function myFunction()

    15.

    How do you write "Hello World" in an alert box?

    alertBox("Hello World");
    msgBox("Hello World");
    alert("Hello World");
    msg("Hello World");

    16.

    Inside which HTML element do we put the JavaScript?

    <script>
    <js>
    <javascript>
    <scripting>

    17.

    How can you add a comment in a JavaScript?

    // This is a comment-->
    //This is a comment
    <!--This is a comment-->
    'This is a comment

    18.

    How can you detect the client's browser name?

    browser.name
    navigator.appName
    client.navName
    navigator.browsername

     
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