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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 number of control lines for 32 to 1 multiplexer is ? Ans. For 32 (2 5 ) the number of control lines and to select one i/p between them total 5 select lines are needed.
Define Top-down parsing Techniques Top-down parsing can be observed as an attempt to find left-most derivations of an input-stream through searching for parse trees using a top
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It depends on our requirement. When we are needed an integer to be stored in 1 byte (means less than or equal to 255) we use short int, for 2 bytes we use int, for 8 bytes we use l
UDP (User Diagram Protocol) is? It is both Connectionless and Message Oriented.
Explain dissimilar security protocols used for e-commerce applications. The e-commerce systems of today are composed of a number of components including: a commerce server, d
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Write a procedure which divides a 32-bit number by a 16-bit number. The procedure must be general which is it's defined in one module and can be called from another assembly module
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