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 Web Technology Questions

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Q:

What is the difference between "==" and "==="?

Answer

"==" checks equality only,
"===" checks for equality as well as the type.

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Q:

How to insert Javascript in HTML?

Answer

We can insert JavaScript in HTML using <Script tag>. JavaScript can be enclosed in <script type = text/javascript> and ending with </script>.


Example: 


<html> 


  <body> 


        <script type="text/javascript"> 


               ...JavaScript….


         </script> 


   </body> 


</html>

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Q:

What are the ways in which attackers can infiltrate the system?

Answer

- Web servers can be infiltrated using the command shell by an attacker to read the HTML files that is getting transferred. 


- If the set-uid scripts are not proper and bad then the infiltration can happen by the attacker. 


- The processes are not given proper permissions so that the password can be changed by using the “passwd” command to change the password of the system.


- This also authenticates the user for accessing the system and the files on it containing the data. 


- The program that is used in the operating system doesn’t follow the principle of least privilege and lead to security issues.

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Q:

What is a Manifest file?

Answer

A Manifest file is a simple text file that tells the browser what to cache and what not to cache. 


There are three sections of a Manifest file:


i.) CACHE MANIFEST - Files listed here are cached after they are downloaded for the first time. 


ii.) NETWORK - Files listed here require a connection to the server, and are never cached


iii.) FALLBACK - Files listed here specify fallback pages if a page is inaccessible

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Q:

What is web portal?

Answer

Web portal is a business gateway, It organizes business operations.


Ex: Online shopping portals, Job portals etc...


 

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Q:

What are the ways through which the files can be transferred to server?

Answer

- Files can be transferred to the server by using the FTP protocol also known as File Transfer Protocol. 


- FTP is used as a standard network protocol that transfers the file from one computer to another computer using the TCP protocol network.


- This uploads the pages and other documents that are stored in private disk to the public web hosting server. 


- FTP is used on a client server architecture that allows different controls and data connections between the client and the server. 


- FTP uses clear-text sign in protocol that allows the client to use the user name and password for authentication purpose.

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Q:

What is Javascript namespacing? How and where is it used?

Answer

Using global variables in Javascript is evil and a bad practice. That being said, namespacing is used to bundle up all your functionality using a unique name. In JavaScript, a namespace is really just an object that you’ve attached all further methods, properties and objects. It promotes modularity and code reuse in the application.

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Q:

What needs to be taken into consideration to host a website?

Answer

- To host a website a platform needs to be decided using which the hosting can be made simpler. 


- The specification needs to be determined before hosting the website and choosing the hosting platform. 


- The choice of operating system needs to be clear in choosing the website hosting services and the resources that the particular hosting platform requires need to be known. 


- The web hosting platform requires lots of services that need to be decided before hosting the website on the web.


- The space and the cost need to be kept minimum and according to that the choice has to be made between hosted or shared platforms.

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