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Explain about the viruses in detail
Note 1: Viruses don't just infect computers, they may also affect mobile phones, MP3 players etc. - any device that can download files from a source such as internet is potentially at risk.
Note 2: Backing up may allow files which have become corrupted/lost (because of hacking or viruses) to be reinstated; though, this wouldn't recover the system nor would it prevent viruses/hacking affecting a system in the first place.
Note 3: Other problems like spam, pop ups, cookies, etc. are more of a nuisance (albeit they can considerably slow down operation of a computer system) and can be made inactive or blocked (as they can become active without user's knowledge) using appropriate software.
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Global variables are accessible only to the batch program while external variables can be referenced from any batch program residing in the similar system library.
Explain about the two services that are used to deal with communication. Message Service: Used by the application servers to change short internal messages, all system commu
The IT infrastructure of MobTex is simple but vital to the operation of the business. All client data, billing, stock management etc is done via a specialised application called "A
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