Windows Script Host – Clean Virus (vbs)

CleanVirus.vbs

When ever i start my computer the first screen that pops out is small window displaying the below message:

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Windows Script Host
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Can not find script file “C:\WINDOWS\system32\CleanVirus.vbs”.

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OK
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I am not sure why i am getting this message on every start up.

My AVG Antivirus also cannot detect this. I am not sure whether this is a virus or a worm, or a bot or something.

I don’t know what should i do, for now i click on the OK button and close the window.

Kindly suggest some ideas or solutions to get rid of this message!!!!

clean virus vbs

Clever Google Tricks

If you are on the hunt for free desktop wallpaper, stock images, WordPress templates or the like, using Google to search your favorite social media sites is your best bet. The word “free” in any standard search query immediately attracts spam. Why wade through potential spam in standard search results when numerous social media sites have an active community of users who have already ranked and reviewed the specific free items that interest you. All you have to do is direct Google to search through each of these individual social media sites, and bingo… you find quality content ranked by hundreds of other people.
Examples:
site:digg.com free “desktop wallpaper”
site:reddit.com free “wordpress templates”
site:del.icio.us free “stock images”
site:netscape.com free “ringtones”
site:stumbleupon.com free icons

 Google for Music, Videos, and Ebooks – Google can be used to conduct a search for almost any file type, including Mp3s, PDFs, and videos. Open web directories are one of the easiest places to quickly find an endless quantity of freely downloadable files. This is an oldie, but it’s a goodie! Why thousands of webmasters incessantly fail to secure their web severs will continue to boggle our minds.
Examples:
Find Music: -inurl:(htm|html|php) intitle:”index of” +”last modified” +”parent directory” +description +size +(wma|mp3) “Counting Crows”
Find Videos: -inurl:(htm|html|php) intitle:”index of” +”last modified” +”parent directory” +description +size +(mpg|wmv) “chapelle”
Find Ebooks: -inurl:(htm|html|php) intitle:”index of” +”last modified” +”parent directory” +description +size +(pdf|doc) “george orwell 1984″

Bonus Material:
Here is a list of my favorite Google advanced search operators, operator combinations, and related uses:
link:URL = lists other pages that link to the URL.
related:URL = lists other pages that are related to the URL.
site:domain.com “search term = restricts search results to the given domain.
allinurl:WORDS = shows only pages with all search terms in the url.
inurl:WORD = like allinurl: but filters the URL based on the first term only.
allintitle:WORD = shows only results with terms in title.
intitle:WORD = similar to allintitle, but only for the next word.
cache:URL = will show the Google cached version of the URL.
info:URL = will show a page containing links to related searches, backlinks, and pages containing the url. This is the same as typing the url into the search box.
filetype:SOMEFILETYPE = will restrict searches to that filetype
-filetype:SOMEFILETYPE = will remove that file type from the search.
site:www.somesite.net “+www.somesite.net” = shows you how many pages of your site are indexed by google
allintext: = searches only within text of pages, but not in the links or page title
allinlinks: = searches only within links, not text or title
WordA OR WordB = search for either the word A or B
“Word” OR “Phrase” = search exact word or phrase
WordA -WordB = find word A but filter results that include word B
WordA +WordB = results much contain both Word A and Word B
~WORD = looks up the word and its synonyms
~WORD -WORD = looks up only the synonyms to the word

Compress Javascript and CSS Files Using PHP

Enhance your Javascript and CSS resources:

I have been doing some web applications lately, and wanted to compress my Javascript and CSS files so that page loads are quicker and also the files are cached at all times.

So i thought to myself, that we could truncate the JS and CSS files by removing the unwanted spaces and characters.

So i began writing a script that does the following:

1. Reads JS or CSS files(s) from a particular folder called either js or css.
2. Removes all the unwanted characters and blank spaces.
3. Creates a new file in a new directory called js_cache or css_cache.
4. Wallla!! we have done it, you have successfully reduced the file file size.

The script will allow you to manage easily your Javascript and CSS resources and to reduce the amount of data transferred between the server and the client.

Performances:

We can say that the performance is better but not the best, but it works.

You would see a slight reduce in time between the server and the client.

Restrictions:

In CSS files there are no problems, but in case of Javascript there may some problems where single line comments are used like ‘// comment ‘.

Therefore always use multi line comments like /* comment */ if you want to use this script

Requirements:

1. Create a folder for you project
2. Dump all the js files in js folder and css files in css folder
3. Then create two more folders js_cache and css_cache
4. Copy and paste this script in the project directory
5. Edit the script by changing the constant FILE_TYPE as js or css only
6. Run the script
7. New files will be created in js_cache and css_cache
8. Wow, its done now use these file instead of the original one

ALL THE BEST…

HAPPY SCRIPTING…..

Do keep sharing!!!

Download file:

Compress Javascript and CSS Files Using PHP

Basic AJAX (Asynchronous JavaScript and XML)

Ajax, sometimes written as AJAX (shorthand for asynchronous JavaScript and XML), is a group of interrelated web development techniques used on the client-side to create interactive web applications or rich Internet applications.

With Ajax, web applications can retrieve data from the server asynchronously in the background without interfering with the display and behavior of the existing page.


/**
* Declare global variable....
* @param string elementName this is to identify the elemnt in which the response should be dispalyed. like as div id (required)
*/
var elementName = "";

/**
* Open a connection to the specified URL, which is
* intended to provide an XML message. The specified data
* is sent to the server as parameters. This is the same as
* calling xmlOpen(“POST”, url, toSend, responseHandler).
*
* @param string url The URL to connect to.
* @param string toSend The data to send to the server; must be URL encoded.
* @param function responseHandler The Javascript function handling server response.
* @param function elementIdentify The elemnt in which the response should be dispalyed.
*/
function xmlPost(url, toSend, responseHandler, elementIdentify)
{
elementName = elementIdentify;
xmlOpen(“POST”, url, toSend, responseHandler);
}

/**
* Open a connection to the specified URL, which is
* intended to provide an XML message. No other data is
* sent to the server. This is the same as calling
* xmlOpen(“GET”, url, null, responseHandler).
*
* @param string url The URL to connect to.
* @param function responseHandler The Javascript function handling server response.
* @param function elementIdentify The elemnt in which the response should be dispalyed.
*/
function xmlGet(url, responseHandler, elementIdentify)
{
elementName = elementIdentify;
xmlOpen(“GET”, url, null, responseHandler);
/**
* This code can be used if you need to call the required function after every interval i.e seconds..
* setTimeout(“xmlGet(‘products.php’, notesResponseHandler)”,3000);
* setTimeout(“alert(‘products.php’)”,3000);
*/
}

/**
* Open a connection to the specified URL, which is
* intended to respond with an XML message.
*
* @param string method The connection method; either “GET” or “POST”.
* @param string url The URL to connect to.
* @param string toSend The data to send to the server; must be URL encoded.
* @param function responseHandler The Javascript function handling server response.
*/
function xmlOpen(method, url, toSend, responseHandler)
{
// alert(url);
if (window.XMLHttpRequest)
{
// browser has native support for XMLHttpRequest object
req = new XMLHttpRequest();
}
else if (window.ActiveXObject)
{
// try XMLHTTP ActiveX (Internet Explorer) version
req = new ActiveXObject(“Microsoft.XMLHTTP”);
}

if(req)
{
req.onreadystatechange = responseHandler;
req.open(method, url, true);
req.setRequestHeader(“content-type”,”application/x-www-form-urlencoded”);
req.send(toSend);
}
else
{
alert(‘Your browser does not seem to support XMLHttpRequest.’);
}
}

/**
* Handler for server’s response to notes.xml request.
* Notes are pulled from notes.xml and replace the
* contents of the DIV with id ‘notesSection’.
*/
function notesResponseHandler()
{
// Make sure the request is loaded (readyState = 4)
if (req.readyState == 4)
{
// Make sure the status is “OK”
if (req.status == 200)
{
var swappableSection = document.getElementById(elementName);
var str = req.responseText;
swappableSection.innerHTML = str;
}
else
{
alert(“There was a problem retrieving the XML data:\n” +
req.statusText);
}
}
}

/**
* When a file gets included in the page….
* Call the function on load or on click….
*/
//xmlGet(‘products.php’, notesResponseHandler);
//alert(‘called’);

Object Oriented Programming Interview Questions

OOPS Interview Questions – Basics and Advanced

These are some basics and advanced questions usually asked in the field of OOP (Object Oriented Programming) 

1) Explain the rationale behind Object Oriented concepts? Object oriented concepts form the base of all modern programming languages. Understanding the basic concepts of object-orientation helps a developer to use various modern day programming languages, more effectively.

2) Explain about Object oriented programming? Object oriented programming is one of the most popular methodologies in software development. It offers a powerful model for creating computer programs. It speeds the program development process, improves maintenance and enhances reusability of programs.

3) Explain what is an object? An object is a combination of messages and data. Objects can receive and send messages and use messages to interact with each other. The messages contain information that is to be passed to the recipient object.

4) Explain the implementation phase with respect to OOP? The design phase is followed by OOP, which is the implementation phase. OOP provides specifications for writing programs in a programming language. During the implementation phase, programming is done as per the requirements gathered during the analysis and design phases.

5) Explain about the Design Phase? In the design phase, the developers of the system document their understanding of the system. Design generates the blue print of the system that is to be implemented. The first step in creating an object oriented design is the identification of classes and their relationships.

6) Explain about a class? Class describes the nature of a particular thing. Structure and modularity is provided by a Class in object oriented programming environment. Characteristics of the class should be understandable by an ordinary non programmer and it should also convey the meaning of the problem statement to him. Class acts like a blue print.

7) Explain about instance in object oriented programming? Every class and an object have an instance. Instance of a particular object is created at runtime. Values defined for a particular object define its State. Instance of an object explains the relation ship between different elements.

8) Explain about inheritance? Inheritance revolves around the concept of inheriting knowledge and class attributes from the parent class. In general sense a sub class tries to acquire characteristics from a parent class and they can also have their own characteristics. Inheritance forms an important concept in object oriented programming.

9) Explain about multiple inheritance? Inheritance involves inheriting characteristics from its parents also they can have their own characteristics. In multiple inheritance a class can have characteristics from multiple parents or classes. A sub class can have characteristics from multiple parents and still can have its own characteristics.

10) Explain about encapsulation? Encapsulation passes the message without revealing the exact functional details of the class. It allows only the relevant information to the user without revealing the functional mechanism through which a particular class had functioned.

11) Explain about abstraction? Abstraction simplifies a complex problem to a simpler problem by specifying and modeling the class to the relevant problem scenario. It simplifies the problem by giving the class its specific class of inheritance. Composition also helps in solving the problem to an extent.

12) Explain the mechanism of composition? Composition helps to simplify a complex problem into an easier problem. It makes different classes and objects to interact with each other thus making the problem to be solved automatically. It interacts with the problem by making different classes and objects to send a message to each other.

 13) Explain about polymorphism? Polymorphism helps a sub class to behave like a parent class. When an object belonging to different data types respond to methods which have a same name, the only condition being that those methods should perform different function.

14) Explain about overriding polymorphism? Overriding polymorphism is known to occur when a data type can perform different functions. For example an addition operator can perform different functions such as addition, float addition etc. Overriding polymorphism is generally used in complex projects where the use of a parameter is more.

15) Explain about object oriented databases? Object oriented databases are very popular such as relational database management systems. Object oriented databases systems use specific structure through which they extract data and they combine the data for a specific output. These DBMS use object oriented languages to make the process easier.

16) Explain about parametric polymorphism? Parametric polymorphism is supported by many object oriented languages and they are very important for object oriented techniques. In parametric polymorphism code is written without any specification for the type of data present. Hence it can be used any number of times.

17) What are all the languages which support OOP? There are several programming languages which are implementing OOP because of its close proximity to solve real life problems. Languages such as Python, Ruby, Ruby on rails, Perl, PHP, Coldfusion, etc use OOP. Still many languages prefer to use DOM based languages due to the ease in coding.

Others Frequenlty Asked

1) Explain what is object oriented programming language? Object oriented programming language allows concepts such as modularity, encapsulation, polymorphism and inheritance. Simula is credited to be the first object oriented language. Objects are said to be the most important part of object oriented language. Concept revolves around making simulation programs around an object.

2) Name some languages which have object oriented language and characteristics? Some of the languages which have object oriented languages present in them are ABAP, ECMA Script, C++, Perl, LISP, C#, Tcl, VB, Ruby, Python, PHP, etc. Popularity of these languages has increased considerably as they can solve complex problems with ease.

3) Explain about UML? UML or unified modeling language is regarded to implement complete specifications and features of object oriented language. Abstract design can be implemented in object oriented programming languages. It lacks implementation of polymorphism on message arguments which is a OOPs feature.

4) Explain the meaning of object in object oriented programming? Languages which are called as object oriented almost implement everything in them as objects such as punctuations, characters, prototypes, classes, modules, blocks, etc. They were designed to facilitate and implement object oriented methods.

5) Explain about message passing in object oriented programming? Message passing is a method by which an object sends data to another object or requests other object to invoke method. This is also known as interfacing. It acts like a messenger from one object to other object to convey specific instructions.

6) State about Java and its relation to Object oriented programming? Java is widely used and its share is increasing considerably which is partly due to its close resemblance to object oriented languages such as C and C++. Code written in Java can be transported to many different platforms without changing it. It implements virtual machine.

7) What are the problems faced by the developer using object oriented programming language? These are some of the problems faced by the developer using object oriented language they are: – 1) Object oriented uses design patterns which can be referred to as anything in general. 2) Repeatable solution to a problem can cause concern and disagreements and it is one of the major problems in software design.

8) State some of the advantages of object oriented programming? Some of the advantages of object oriented programming are as follows: – 1) A clear modular structure can be obtained which can be used as a prototype and it will not reveal the mechanism behind the design. It does have a clear interface. 2) Ease of maintenance and modification to the existing objects can be done with ease. 3) A good framework is provided which facilitates in creating rich GUI applications.

9) Explain about inheritance in OOPS? Objects in one class can acquire properties of the objects in other classes by way of inheritance. Reusability which is a major factor is provided in object oriented programming which adds features to a class without modifying it. New class can be obtained from a class which is already present.

10) Explain about the relationship between object oriented programming and databases? Object oriented programming and relational database programming are almost similar in software engineering. RDBMS will not store objects directly and that’s where object oriented programming comes into play. Object relational mapping is one such solution.

11) Explain about a class in OOP? In Object oriented programming usage of class often occurs. A class defines the characteristics of an object and its behaviors. This defines the nature and functioning of a specified object to which it is assigned. Code for a class should be encapsulated.

12) Explain the usage of encapsulation? Encapsulation specifies the different classes which can use the members of an object. The main goal of encapsulation is to provide an interface to clients which decrease the dependency on those features and parts which are likely to change in future. This facilitates easy changes to the code and features.

13) Explain about abstraction? Abstraction can also be achieved through composition. It solves a complex problem by defining only those classes which are relevant to the problem and not involving the whole complex code into play.

14) Explain what a method is? A method will affect only a particular object to which it is specified. Methods are verbs meaning they define actions which a particular object will perform. It also defines various other characteristics of a particular object.

15) Name the different Creational patterns in OO design? There are three patterns of design out of which Creational patterns play an important role the various patterns described underneath this are: – 1) Factory pattern 2) Single ton pattern 3) Prototype pattern 4) Abstract factory pattern 5) Builder pattern

16) Explain about realistic modeling? As we live in a world of objects, it logically follows that the object oriented approach models the real world accurately. The object oriented approach allows you to identify entities as objects having attributes and behavior.

 17) Explain about the analysis phase? The anlaysis or the object oriented analysis phase considers the system as a solution to a problem in its environment or domain. Developer concentrates on obtaining as much information as possible about the problem. Critical requirements needs to be identified.