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SCJA Question regarding J2ME

Arundhati Roy
Greenhorn

Joined: May 24, 2007
Posts: 25
Hi Cameron,

I did sent you a private message regarding a question in Sun's e practice sample.......

Which two types of applications are appropriate for J2ME? (Choose two.)


A
games
B
word processing
C
remote data collection
D
air traffic control system


The answer is A and C
A is Ok........ But regrading C(remote data collection) the explanation given is Inventory Application.

Can you help me how to interprate such questions..........

Thanks
Arundhati
Cameron Wallace McKenzie
author and cow tipper
Saloon Keeper

Joined: Aug 26, 2006
Posts: 4968

I tried to message you, but you've got incoming messages turned off.

Remember that a J2ME application will be running on a micro-device like a cell phone or personal organizer. Would you want to type out "Gone with the Wind" on a cell phone? Probably not. So, a word processor wouldn't be a good candidate for a micro device.

What about a little game? Perfect! I can't tell you how much time I've played a stupid little game on my cell phone while I'm in the airport waiting for a flight.

What about remote data collection? What they're talking about here is perhaps one of those people that come by your house and read the water meters. A micro device working on some custom, handheld device is probably all they need. They can walk up to your water meter, quickly type in your address, and then enter the water reading. So, this would probably be a good candidate for a J2ME device.

Air traffic control? Definitely not something I'd want centrally managed from a cell phone.

So yes, A) and C) would be good.

As far as inventory control goes, I can see someone running around Walmart with a little scanner reading barcodes on products and typing in a quantity to keep track of what's on the shelves. I think that's a valid scenario too.

Kindest regards, and good luck on your studies!

-Cameron McKenzie
Arundhati Roy
Greenhorn

Joined: May 24, 2007
Posts: 25
Thanks a lot........

I am extremely sorry about the private message being turned off......

Ok So when these type of question comes then .

on the broader scenario we need to look at 3 things,

1. The applications broadness
2. Applications feasibility
3. Applications Users/Usage .

Thanks again for such a quick response.

~Arundhati
marc weber
Sheriff

Joined: Aug 31, 2004
Posts: 11343

This is exactly the type of content I think we need in this forum!


"We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer
sscce.org
Kaydell Leavitt
Ranch Hand

Joined: Nov 18, 2006
Posts: 688

I can see J2ME devices also used by carriers such as UPS, where the UPS employees scan packages at every point and this data feeds into a database where the customer can see where your package is from a website, using a tracking number.

J2SE could be used to develop in-house software that runs on desktop computers running Mac or Windows OS.

In this scenario, J2ME, J2SE, and J2EE all work together for a common goal of serving the needs of the enterprise (i.e. big business).
[ February 07, 2008: Message edited by: Kaydell Leavitt ]
 
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