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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.
Q. Illustrate Single In-line Memory Modules? From early days of semiconductor memory till the early 1990s memory was manufactured, brought and installed as a single chip. Chip
Define the Products of Dynamic mode Dynamic model: A model of dynamic behaviour of user object. It defines important states of user object, the way that actions depend on
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Give the organization of centralized store program control ( SPC). Within stored program control systems, a program or set of instructions for the computer that is stored in
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To work with Internet as well as to utilize its facilities we use certain tools. For illustration, Telnet is a tool, which is utilized for logging on remote computers on the Intern
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Why IO devices cannot be connected directly to the system bus? Ans: The IO devices can't be directly connected to the system bus because the following reason A) The data tra
The hexadecimal number for (95.5) 10 is ? Ans. (95.5) 10 = (5F.8) 16 Integer part Fractional part 0.5x16=8.0
write about operator precedence in java?
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