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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.

    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

    2.

    How does a WHILE loop start?

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

    3.

    What is the correct way to write a JavaScript array?

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

    4.

    Inside which HTML element do we put the JavaScript?

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

    5.

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

    6.

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

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

    7.

    How do you create a function in JavaScript?

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

    8.

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

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

    9.

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

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

    10.

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

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

    11.

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

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

    12.

    How can you detect the client's browser name?

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

    13.

    How to write an IF statement in JavaScript?

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

    14.

    Where is the correct place to insert a JavaScript?

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

    15.

    How does a FOR loop start?

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

    16.

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

    Sometimes
    Neither True nor False
    True
    False

    17.

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

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

    18.

    How do you call a function named "myFunction"?

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

     
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