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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.
The process of importing data from one more Access database follows these common steps they are. ? Preparing the document for import operation and make ensure that extensions ar
Serial Execution Execution of a program consecutively, one statement at a time. In the easiest sense, this is what occurs on a one processor machine. However, even many of the
Process of Minimax algorithm: Our aim is just to write the best of best score on the top branches of the tree that player one can guarantee to score if he chooses that move.
Output comparators are used in Theses are used in Dynamic testing of single and multiple module.
Add a byte number from one memory location to a byte from subsequent memory location and put sum in the third memory location. Also save carry flag in the least significant bit of
Design a MOD-6 synchronous counter using J-K Flip-Flops. Ans: Design of Mod-6 Counter: To design the Mod-6 synchronous counter, contain six counter states (that is, from
What start bit and stop bit The first bit known as the Start bit is always a zero and it is used to show the beginning of the character The last bit is known as the stop bit
What are the blocks of microprocessor based system 1. The Memory and I/O System 2. The DOS Operating System 3. The Microprocessor
#question.constructors and destructors
What is a path name? A pathname is the path from the root by all subdirectories to a specified file. In a two-level directory structure a user name and a file name describe a
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