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Mobile Computing & Wireless Application Development - J2ME -

Wireless application development has the following characteristics:
  • multi-platform and multi-device support, since no single device can serve entire organization's needs
  • multi-RF network support
  • multi-backend application and database support
  • integration with web application server platforms
While several different device platforms are being promoted by major device vendors, such as  PalmOS, Microsoft Windows CE, PocketPC and Sambian's EPOC, Motorola and Lutris Technologies (a Santa Cruz, California company) have teamed up to offer Java-based development platform for iDEN handsets. They duo have decided to bundle Lutris' open-source Enhydra application server with Motorola's SDK for iDEN. With this set of Enhydra and J2ME (Java 2 Micro Edition), programmers can develop both server-side and client-side software that takes advantage of Sun's J2ME specifications. iDEN handset that transmits both voice and data, will be available in mid 2001.
Enthusiasts for J2ME point out that J2ME is more open than WAP, because you may choose not to utilize a micro-browser for J2ME applications.
Competing Products or Development Environments
  • BREW from Qualcomm - specifically designed for smartphones and CDMA 
  • MicrochaVM from HP
Why Wireless Application Development Needs Java? - A justification paper from Sun
Status of Enhancements to J2M - New Mobile Information Device profiles (MIDP) of J2ME for  PDAs (PDA profile) and smart phones are coming out in mid 2002. Features like multicasting, SSL (security) and multi-media. New features
  • Superior user interface
  • Better security, permission models and certificate handling
  • Distribution functionality


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Question 1. Which of the following is least like the others?
A.    cube
B.    sphere
C.    pyramid
D.    circle

D (because the circle is the only two-dimensional figure)

Question 2. Consider a language which uses the following set of characters:
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This language must follow the following rules:
  1.    A punctuation character must end all series.
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Question 3. Consider the following flow chart for a customer:

The person in No.1 is:
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