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Q. What do you understand by Scan Codes?
A scan code is a code produced by a microprocessor in keyboard when a key is pressed and is unique to key struck. When this code is received by computer it reports an interrupt and looks up scan code table in BIOS and realize which keys have been pressed and in what combination. Special memory locations known as status bytes tell the status of locking and toggle keys for example Caps lock etc. Every key press produces two different scan codes - one on key-push down known as Make code and another on its popping back known as Break code. This two-key scheme enables the computer to tell when a key is held pressed down for example ALT key when pressing another key say CTRL-ALT-DEL.
Explain the two fundamental models of inter process communication. Two kinds of message passing system are given as: (a) Direct Communication : Along with direct communicat
I tried to run two of the applets in the examples directory of the distribution? Ans) I tried to run two of the applets in the example directory of the distribution. I instal
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What is a linker program? Ans. links the program with other programs required for its execution is called a linker program.
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