Server-Side And Client-Side Scripting MCQ question and answer in javascript with solution

41

Which of the following is a way of embedding Client-side JavaScript code within HTML documents?

A) From javascript:encoding B) External file specified by the src attribute of a “script” tag C) All of the mentioned D) None of the mentioned

Discuss

Answer & Solution

Answer: Option B

Solution:

The Client-side JavaScript code is embedded within HTML documents in four ways :
1. Inline, between a pair of “script” tags
2. From an external file specified by the src attribute of a “script” tag
3. In an HTML event handler attribute, such as onclick or onmouseover
4. In a URL that uses the special javascript: protocol.

42

When does JavaScript code appear inline within an HTML file?

A) Between the “script” tag B) Outside the “script” tag C) Between or Outside the “script” tag D) None of the mentioned

Discuss

Answer & Solution

Answer: Option A

Solution:

JavaScript code can appear inline within an HTML file between the “script” tags.

43

Which character in JavaScript code will be interpreted as XML markup?

A) ! B) > C) & D) .

Discuss

Answer & Solution

Answer: Option C

Solution:

If your JavaScript code contains the < or & characters, these characters are interpreted as XML markup.

44

Which is the root element in a HTML document?

A) HTML B) HEAD C) SCRIPT D) BODY

Discuss

Answer & Solution

Answer: Option A

Solution:

The “html” tag is the root element of any HTML document regardless of it containing a JavaScript code or not.

45

What is the code for getting the current time?

A) now = new Date(); B) var now = new Date(); C) var now = Date(); D) var now = new Date(current);

Discuss

Answer & Solution

Answer: Option B

Solution:

The above code determines the current time and stores it in the variable “now”.

46

What is the code to start displaying the time when document loads?

A) onload = displayTime; B) window. = displayTime; C) window.onload = displayTime; D) window.onload = start;

Discuss

Answer & Solution

Answer: Option C

Solution:

The above code starts displaying the time when the document loads.

47

One of the main advantage of using src attribute is

A) It becomes self-cached B) It makes the HTML file modular C) It restricts manipulation in the HTML file D) It simplifies the HTML files

Discuss

Answer & Solution

Answer: Option D

Solution:

The main advantage of using the src attribute is that it simplifies your HTML files by allowing you to remove large blocks of JavaScript code from them—that is, it helps keep content and behavior separate.

48

What will be done if more than one page requires a file of JavaScript code?

A) Downloads that many times B) Retrives from the browser cache C) Must be re executed D) None of the mentioned

Discuss

Answer & Solution

Answer: Option B

Solution:

If a file of JavaScript code is shared by more than one page, it only needs to be downloaded once, by the first page that uses it—subsequent pages can retrieve it from the browser cache.

49

What is the default value of the type attribute?

A) text/css B) text/javascript C) text D) xml

Discuss

Answer & Solution

Answer: Option B

Solution:

The default value of the type attribute is “text/javascript”. You can specify this type explicitly if you want, but it is never necessary.

50

The language is commonly used to

A) Specify the user’s language B) Specify the language going to be scripted C) No longer in use D) Specify the programmer’s favorable language

Discuss

Answer & Solution

Answer: Option C

Solution:

The language attribute is deprecated and should no longer be used.