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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. Define Synchronization Latency Problem? If two simultaneous processes are executing remote loading then it's not recognized by what time two processes will load as issuing p
Explain briefly about demultiplexers?
How will you allocate sub system? Allocate every concurrent subsystem to hardware unit. General purpose processor or specialized functional unit as follows: Estimate per
what is process management ?
Define the Process of dynamic modelling: Analyse applicability of actions Recognize object states Create dynamic model diagram Express every state in terms o
Name the 7400 series TTL chip which is a priority encoder. Write its truth table. Ans. Available IC in 74 series is 74147 that is a priority encoder. Such I
en a five station token bus LAN with station addresses of 3000, 500, 100, 70, and 50. Stations with addresses of 5000, 4000, 400, 90, and 60 are waiting to enter the ring. Assume a
In a pure combinational circuit is it necessary to mention all the inputs in sensitivity disk? if yes, why? Yes in a pure combinational circuit is it essential to mention all
Cache-Only Memory Access Model (COMA) As we have discussed previous, shared memory multiprocessor systems may use cache memories with each processor for deducting the execution
Q. What is Keyboard Layout? A keyboard layout is arrangement of keys across the keyboard. There is one keyboard layout which anybody who has worked on a standard keyboard or ty
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