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Web Technology Interview Questions and Answers

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
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.
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.

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.

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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