Web Development

Question: If an image is placed styled with z-index=-1 and a text paragraph is overlapped with it. Which one will be displayed on top?
A
The paragraph

B
The image

C
Could be any of the above

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Question: Given the statement var charConvert = toCharCode('x'), what is the error?
A
toCharCode() is a bogus method

B
Nothing. It will work fine

C
toCharCode accepts only numbers

D
toCharCode takes no arguments

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Question: Consider three variables: someText = 'JavaScript1.2'; pattern = /(\w+)(\d)\.(\d)/i; outCome = pattern.exec(someText); What does pattern.global contain?
A
true

B
false

C
undefined

D
null

E
0

F
1

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Question: The form tag is defined as follows:

<form onsubmit="return Validate()" action="http://www.mysite.com/"> 
The validate() function is intended to prevent the form from being submitted if the name field in the form is empty. What will the validate() function look like?
A <script type="text/JavaScript">
    function Validate()
    {
    if(document.forms[0].name.value == "")
            return true;
    else
        return false;
    }
    </script>

B <script type="text/JavaScript">
    function Validate()
    {
    if(document.forms[0].name.value == "")
        return false;
    else
            return true;
    }
    </script>

C <script type="text/JavaScript">
    function Validate()
    {
    if(document.forms[0].name== "")
            return false;
    else
            return true;
    }
    </script>

D <script type="text/JavaScript">
    function Validate()
    {
    if(document.forms[0].name == "")
            return true;
    else
            return false;
    }
    </script>

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Question: You want to delete an element from an options array. How would you do it?
A
Set it to false

B
Set it to null

C
Set it to undefined

D
Set it to -1

E
Set it to 0

F
Set it to 1

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Question: Consider the following variable declarations: Consider the following variable declarations: var a=" adam " var b=" eve " Which of the following would return the sentence " adam and eve "?
A
a.concatinate( "and ", b)

B
a.concat( "and ", b)

C
a.concatinate( " and ", b)

D
d. a.concat(" and ", b)

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Question: Which of the following code snippets is more efficient and why?
<script language="JavaScript"> for(i=0;i<document.images.length;i++) document.images[i].src="blank.gif"; </script> <script language="JavaScript"> var theimages = document.images; for(i=0;i<theimages.length;i++) theimages[i].src="blank.gif" </script>
A
Both are equally efficient

B
The first code is more efficient as it contains less code

C
The first code is more efficient as it employs object caching

D
The second code is more efficient as it employs object caching

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Question: The following statements show two ways of calling a JavaScript function: i)onclick ="a();" ii)onclick="JavaScript:a();" Which of the following options is correct with regard to the above two statements?
A
There is no difference between the two statements

B
The first statement is incorrect and the second one is correct

C
The first statement is correct and the second statement is incorrect.

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Question: You have written the following function to change the source of an image at runtime:

function changeimg(givenImg)
{
document.getElementById('imageID').src=givenImg
} 
You would like the source of the image to change to "image2.gif" only for the time that the user clicks on the image. Which of the following will you use?
A <img id="imageID" src="image1.gif" width="50" height="60" onmousedown="changeimg(image1.gif)" onmouseup="changeimg(image2.gif)">

B <img id="imageID" src="image1.gif" width="50" height="60" onmouseclick="changeimg(image2.gif)" onmouseup="changeimg(image1.gif)">

C <img id="imageID" src="image2.gif" width="50" height="60" onmousedown="changeimg(image1.gif)" onmouseup="changeimg(image2.gif)">

D <img id="imageID" src="image1.gif" width="50" height="60" onmousedown="changeimg('image2.gif')" onmouseup="changeimg('image1.gif')">

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Question: Are the following two statements the same? object.property object[''property'']
A
Yes

B
No

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Question: If an image is placed styled with z-index=-1 and a text paragraph is overlapped with it. Which one will be displayed on top?

Question: Given the statement var charConvert = toCharCode('x'), what is the error?

Question: Consider three variables: someText = 'JavaScript1.2'; pattern = /(\w+)(\d)\.(\d)/i; outCome = pattern.exec(someText); What does pattern.global contain?

Question: The form tag is defined as follows: <form onsubmit="return Validate()" action="http://www.mysite.com/"> The validate() function is intended to prevent the form from being submitted if the name field in the form is empty. What will the validate() function look like?

Question: You want to delete an element from an options array. How would you do it?

Question: Consider the following variable declarations: Consider the following variable declarations: var a=" adam " var b=" eve " Which of the following would return the sentence " adam and eve "?

Question: The following statements show two ways of calling a JavaScript function: i)onclick ="a();" ii)onclick="JavaScript:a();" Which of the following options is correct with regard to the above two statements?

Question: Are the following two statements the same? object.property object[''property'']