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 Web Technology Questions

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Q:

How would you automatically transfer your visitors to a new web page?

Answer

- You can do it with the help of meta tag mentioned below: 


<META HTTP-EQUIV="Refresh" CONTENT="2"; URL="https://www.yourname.com"> 


- Place this tag between <HEAD></HEAD> . 


- It will load yousite.com in 2 seconds.

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Q:

What are meta tags used for?

A) To store information usually relevant to browsers and search engines B) To only store information usually relevant to browsers
C) To only store information about search engines D) To store information about external links
 
Answer & Explanation Answer: A) To store information usually relevant to browsers and search engines

Explanation:
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Q:

Explain about struts dispatch action in DHTML

Answer

DispatchAction is an action that comes with Struts 1.1 or later, that let us combine Struts actions into single class, each with their own method. The org.apache.struts.action.DispatchAction class allows multiple operations to map to the different functions in the same Action class.


For e:g; html:hidden property="dispatch" value="error"/>


<SCRIPT>function set(target) {document. forms[0].dispatch. value=target;}</SCRIPT>

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Q:

What do you mean by undeclared and undefined variables ?

Answer

Difference between undeclared and undefined variables is defined as


Undeclared variables are those that do not exist in a program and are not declared. If the program tries to read the value of an undeclared variable, then a runtime error is encountered.


Undefined variables are those that are declared in the program but have not been given any value. If the program tries to read the value of an undefined variable, an undefined value is returned.

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Q:

How to upload struts file in DHTML?

Answer

The interface org.apache.struts.upload.FormFile is used for the struts file upload application. This interface represents a file that has been uploaded by a client. It is the only interface or class in upload package which is typically referenced directly by a Struts application.


This is not specific to Struts in case of DHTML but the two things that are needed in DHTML page is: first, the form needs to specify an enctype of multipart/form-data and second an <input> form control of type file.


Following are the steps to load file in DHTML:


- Creating a bean


- Writing the ActionClass.


- Mapping the bean in struts-config.xml


- Defining actionmapping


- Developing the DHTML page.

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Q:

What are string functions in VBScript?

Answer

Asc() - Returns ANSI Character Code 


Chr() - Returns Character from ANSI Code 


InStr() - Find a string within another 


InStrRev() - Find a string within another (Reverse) 


LCase() - Convert a string to lowercase 


Left() - Crops a string from left 


Len() - Determine the length of a string 


LTrim() - Remove leading spaces from a string 


Mid() - Crops a string 


Replace() - Replace a substring within a string 


Right() - Crops a string from right 


RTrim() - Remove trailing spaces from a string 


Space() - Creates a string with the specified number of spaces 


StrComp() - Compare two strings 


String() - Creates a repeated character string 


StrReverse() - Reverse the characters of a string 


Trim() - Remove both leading and trailing spaces from a string 


UCase() - Convert a string to uppercase 

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Q:

What is the purpose of Buffer class in Node.js?

Answer

Buffer class could be a global class and may be accessed in application without importing buffer module. A Buffercould be a quite an array of integers and corresponds to a raw memory allocation outside the V8 heap. A Buffer can not be resized.

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Q:

What is templates in AngularJS?

Answer

Templates are the rendered view with information from the controller and model. These can be a single file like index.html or multiple views in one page using "partials".

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