JavaScript, Web Development

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)

Note: Not available
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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

Note: Not available
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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.

Note: Not available
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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')">

Note: Not available

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

B
No

Note: Not available
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Question: Which of the following is not a JavaScript string method?
A
rep

B
split

C
substr

D
slice

Note: Not available
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Question: Consider the following JavaScript alert:
<script type="text/JavaScript"> function message(){ alert("Welcome to ExpertRating!!!") } </script>
You want the user to see the above message upon opening the page. How will you implement this?
A
<body onload="message()">

B
<body onunload="message()">

C
<body onsubmit="message()">

D
<body onreset="message()">

Note: Not available
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Question: You are setting cookies with JavaScript. What happens to cookies.txt data if the file exceeds the maximum size?
A
Your script automatically generates a run-time error

B
Your script automatically generates a load-time error

C
All processes using document.cookie are ignored

D
The file is truncated to the maximum length

Note: Not available
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Question: What does the following code snippet do? <input type="radio" name="r1" value="radio1" onclick="this.checked=false;alert('sorry')">
A
The code is invalid

B
The code makes it necessary for the user to select the radio button

C
The code disables the radio button

D
The code displays an alert when the user selects the button

Note: Not available
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Question: How would you declare a global variable in your JavaScript code?
A
All variables are local in JavaScript

B
You will have to declare the variable between the 'script' tags and outside a function to make the variable global

C
You will have to precede the variable name with the constant global

D
You will have to declare the variable in an external file

Note: Not available
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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 "?

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'']

Question: Which of the following is not a JavaScript string method?

Question: Consider the following JavaScript alert:
<script type="text/JavaScript"> function message(){ alert("Welcome to ExpertRating!!!") } </script>
You want the user to see the above message upon opening the page. How will you implement this?

Question: You are setting cookies with JavaScript. What happens to cookies.txt data if the file exceeds the maximum size?

Question: What does the following code snippet do? <input type="radio" name="r1" value="radio1" onclick="this.checked=false;alert('sorry')">

Question: How would you declare a global variable in your JavaScript code?

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'']

Question: Which of the following is not a JavaScript string method?

Question: Consider the following JavaScript alert:<script type="text/JavaScript"> function message(){ alert("Welcome to ExpertRating!!!") } </script> You want the user to see the above message upon opening the page. How will you implement this?

Question: You are setting cookies with JavaScript. What happens to cookies.txt data if the file exceeds the maximum size?

Question: What does the following code snippet do? <input type="radio" name="r1" value="radio1" onclick="this.checked=false;alert('sorry')">

Question: How would you declare a global variable in your JavaScript code?

Question: Consider the following JavaScript alert:
<script type="text/JavaScript"> function message(){ alert("Welcome to ExpertRating!!!") } </script>
You want the user to see the above message upon opening the page. How will you implement this?