Web Technology Questions

Q:

What are the principles in providing the security for the computer programs?

Answer

- The principle of least privilege is used to provide more security to the computer programs. 


- The principle allows the designing of the program such that any unauthorized access is not allowed and only the person who owns the program will be able to access it. 


- The services provided should be able to access only those products that need the services. 


- Web servers that are involved in responding the queries of the web users provide only accessing to the HTML files that will serve the purpose of the programs. 


- Computer programs should be made such that it provides secure features of logging into the program with proper authentication.

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Q:

What are the steps involved in uploading the files using FTP client software?

Answer

- FTP is used to upload the files on the server from the client side where it is installed on the computer of clients. 


- FTP client is checked for the installation of the software and according to that the appropriate directory is uploaded on the hosting server. 


- The hosting server uploads the files that is being created by the user and set the permissions for it so that public can access it. 


- Web hosting uses different directories like HTML that is used as var/www/html that is determined using the FTP client. 


- Initial local directory is being set up using FTP client and it is where the website gets stored. 


- The transfer mode is being determined for the files that need to be transferred either in ASCII or BINARY mode.

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Q:

How do you create a new object in JavaScript?

Answer

var obj = new Object(); or var obj = {};

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Q:

What is Web Server?

Answer

Web server handles client side and server side validations and helps to deliver web content that can be accessed through the Internet protocols.


Examples:


Microsoft IIS (Internet Information Service)


Apache web server from Apache


Java web server


Pramathi web server etc...

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Q:

What is the use of FOR XML in SQL Server?

Answer

SQL Server is having a fantastic feature to retrieve data persisted in the form of XML format. The data in the XML format can be retrieved using FOR XML clause appending to the SELECT statement.


It offers 3 modes.


- “FOR XML AUTO": Returns XML elements that are nested, based on which tables are listed in the "from" part of the query, and which fields are listed in the "select" part.


- "FOR XML RAW": Returns XML elements with the "row" prefix (ex: ""). Each column in a table is represented as an attribute and null column values aren't included.


- "FOR XML EXPLICIT": Explicit mode is the most complex shaping method used in SQL Server 2000. It allows users to query a data source in such a way that the names and values of the returned XML are specified before the query batch is executed. 

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Q:

What is web application?

Answer

Web application provides services (Free and Paid) apart from information.


Ex: Online Banking System


It provides Bank  information , Branches & ATM information, Loans information etc...


And It provides balance enquiry, Fund transfer, Bill payments like services.

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Q:

What is the Use of SPAN in HTML and give one example?

Answer

The <span> tag is used to group inline-elements in a document.


The <span> tag provides no visual change by itself.


The <span> tag provides a way to add a hook to a part of a text or a part of a document.


 


EX :


<p>My Car Color is <span style="color:blue">blue</span> </p>

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Q:

What is HTML5 Web Storage?

Answer

With HTML5, it is possible for the web pages to store the data locally in the user's browser. This web storage is much faster and secured than the cookies. Also, a larger amount of data can be stored without causing any adverse effect to the performance of the website. 


The data here is not included with every server request. It is used ONLY when it is asked for. It is only that particular web page that can access the data stored by itself.

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