JavaScript, Web Development

Question: How would you randomly choose an element from an array named myStuff if the number of elements changes dynamically?
A
randomElement = myStuff[Math.floor(Math.random() * myStuff.length)];

B
randomElement = myStuff[Math.ceil(Math.random() * myStuff.length)];

C
randomElement = myStuff[Math.random(myStuff.length)];

D
randomElement = Math.random(myStuff.length);

Note: Not available
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Question: Which of the following declarations is not valid?
A
var a var b var c

B
var a, b, c

C
var a=10, b=20, c=30

D
All are valid

Note: Not available
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Question: How will you change the color of all the paragraph text to blue when the mouse is placed over paragraph, and reset it back when the mouse leaves?
A
 The text of the paragraph..

B
 The text of the paragraph..

C
 The text of the paragraph..

D
 The text of the paragraph..

Note: Not available
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Question: Which property would you use to redirect a visitor to another page?
A
document.URL

B
window.location.href

C
document.location.href

D
link.href

Note: Not available
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Question: What will the following code snippet do? onMove="window.status='come on in!'"
A
It displays the message 'come on in!' when the user moves the mouse over the document

B
It displays the message 'come on in!' when the user clicks the mouse on the document

C
It displays the message 'come on in!' when the user moves the window

D
None of the above

Note: Not available
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Question: Consider the three variables: someText = 'JavaScript1.2'; pattern = /(\w+)(\d)\.(\d)/i; outCome = pattern.exec(someText); What does outCome[0] contain?
A
true

B
false

C
JavaScript1.2

D
null

Note: Not available
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Question: You want to keep track of when the user highlights text within a text or textarea object. Which event would you use?
A
onSelect

B
onBlur

C
onChange

D
onMove

Note: Not available
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Question: How would you check whether the variable vRast exists or not?
A
if (typeof vRast="undefined") {}

B
if (typeof vRast =="undefined") {}

C
if (vRast.defined =true) {}

D
if (vRast.defined ==true) {}

Note: Not available
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Question: Which of the following shortcuts can be used for writing multiple document.write statements?
A
for(document){}

B
with(document) {}

C
This(document){}

D
None of the above

Note: Not available
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Question: Given the following window.open function: window.open(url,name,"attributes") How will you ensure that different urls are opened in the same window?
A
The second attribute, name should be the same

B
The name attribute should be null

C
The name attribute should be omitted

D
The name attribute should be different

Note: Not available
1. Report

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Question: How would you randomly choose an element from an array named myStuff if the number of elements changes dynamically?

Question: Which of the following declarations is not valid?

Question: How will you change the color of all the paragraph text to blue when the mouse is placed over paragraph, and reset it back when the mouse leaves?

Question: Which property would you use to redirect a visitor to another page?

Question: What will the following code snippet do? onMove="window.status='come on in!'"

Question: Consider the three variables: someText = 'JavaScript1.2'; pattern = /(\w+)(\d)\.(\d)/i; outCome = pattern.exec(someText); What does outCome[0] contain?

Question: You want to keep track of when the user highlights text within a text or textarea object. Which event would you use?

Question: How would you check whether the variable vRast exists or not?

Question: Which of the following shortcuts can be used for writing multiple document.write statements?

Question: Given the following window.open function: window.open(url,name,"attributes") How will you ensure that different urls are opened in the same window?