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

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

    2.

    How do you create a function in JavaScript?

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

    3.

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

    4.

    Where is the correct place to insert a JavaScript?

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

    5.

    How do you call a function named "myFunction"?

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

    6.

    How does a WHILE loop start?

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

    7.

    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-->

    8.

    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">

    9.

    How can you detect the client's browser name?

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

    10.

    How does a FOR loop start?

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

    11.

    How to write an IF statement in JavaScript?

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

    12.

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

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

    13.

    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

    14.

    Inside which HTML element do we put the JavaScript?

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

    15.

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

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

    16.

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

    True
    Sometimes
    False
    Neither True nor False

    17.

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

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

    18.

    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"]

     
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