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Web Technology Interview Questions and Answers

1
1. Mention what are the main language or platform used for web-design?

The main language used for web-designing are

  • HTML: Base template
  • CSS: Styling
  • JavaScript: Functionality
  • PHP: Server side scripts
2
What is DHTML? What are the features of DHTML?

DHTML stands for Dynamic HTML. The first thing that we need to clear about DHTML is that it is neither a language like HTML, JavaScript etc. nor a web standard. It is just a combination of HTML, JavaScript and CSS. It just uses these languages features to build dynamic web pages. DHTML is a feature of Netscape Communicator 4.0, and Microsoft Internet Explorer 4.0 and 5.0 and is entirely a "client-side" technology.
Features of DHTML:

  • Simplest feature is making the page dynamic.
  • Can be used to create animations, games, applications, provide new ways of navigating through web sites.
  • DHTML use low-bandwidth effect which enhance web page functionality.
  • Dynamic building of web pages is simple as no plug-in is required.
  • Facilitates the usage of events, methods and properties and code reuse.
3
What are the components of web services?

There are four main components: XML, SOAP, UDDI, AND WSDL.

XML: eXtensible Markup Language is a uniform data representation and exchange mechanism.

SOAP: Simple Object Access Protocol, SOAP is a standard way of using XML vocabulary to enable programs on separate computers to interact across any network and describing messages between applications.

UDDI: Universal Description, Discovery, and Integration specification, UDDI is a mechanism to register and located WS based application.

WSDL: Web Services Description Language, this is a standard meta language to describe the services offered. Specifically, WSDL states what a request message much contain and what the response will look like in a clear notation. WSDL also defines where the service is available and what communications protocol is used to talk to that service.

4
What’s an example of a real web service in action?

IBM Web Services Browser, available on the IBM Alphaworks site, is a good and intuitive example of a real web service. The browser provides a series of web services demonstrations. Behind the scenes, it ties together SOAP, WSDL, and UDDI to provide a simple plug-and-play interface for finding and integrating web services. For example, you can find a stock-quote service, a traffic-report service, and a weather service. Each service is independent, and you can stack services like building blocks.

5
Mention what are some bad examples of web design?
  • Blinking, spinning or flashing images
  • Black background with white, light or pale text
  • Black backgrounds with dark text
  • Busy tiled background images with any color text
  • Everything Centered
  • Too many images or Huge images
  • List of links
  • Too many headlines or Blinking text
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