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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 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 then
    if i <> 5

    2.

    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

    3.

    How can you detect the client's browser name?

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

    4.

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

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

    5.

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

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

    6.

    Where is the correct place to insert a JavaScript?

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

    7.

    How does a FOR loop start?

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

    8.

    How do you call a function named "myFunction"?

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

    9.

    How does a WHILE loop start?

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

    10.

    How do you create a function in JavaScript?

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

    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.

    Inside which HTML element do we put the JavaScript?

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

    13.

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

    14.

    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");

    15.

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

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

    16.

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

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

    17.

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

    False
    Sometimes
    True
    Neither True nor False

    18.

    How to write an IF statement in JavaScript?

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

     
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