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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 round the number 7.25, to the nearest integer?

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

    2.

    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)

    3.

    What is the correct way to write a JavaScript array?

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

    4.

    How does a WHILE loop start?

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

    5.

    How do you call a function named "myFunction"?

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

    6.

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

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

    7.

    How does a FOR loop start?

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

    8.

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

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

    9.

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

    10.

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

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

    11.

    Where is the correct place to insert a JavaScript?

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

    12.

    Inside which HTML element do we put the JavaScript?

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

    13.

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

    Neither True nor False
    True
    False
    Sometimes

    14.

    How to write an IF statement in JavaScript?

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

    15.

    How can you detect the client's browser name?

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

    16.

    How do you create a function in JavaScript?

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

    17.

    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

    18.

    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

     
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