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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.
Describe the essential properties of the Real Time operating systems. Real time operating system has following essential properties: Time constraint result Priority
A common task for a system administrator is to create new user accounts. In this lab you will be creating output that looks like an /etc/passwd file. The Problem You are to
What is error checking? It computes the error correcting code (ECC) value for the data read from the given sector and compares it with the corresponding ECC value read from the
Q. Explain the graphic display system? The function of your graphic display system is to display bit-mapped graphics on your monitor. The image displayed on your system so com
Q. Convert the following from octal to binary, decimal, hexadecimal and BCD. a) 7.7 b) 4037 c) 23.34
Q. How to Create a Rollover Image? A rollover image is an image whose display changes when pointer passes ('rolls') over it. You will use Dreamweaver's Insert Rollover Image co
Which of the following is the fastest logic ECL, TTL, CMOS or LSI ? Ans. The fastest logic is ECL.
What are advantages and disadvantages of using EEPROM? The benefits are that EEPROM do not have to be removed for erasure. Also it is possible to delete the cell contents selec
Electric typewriter : Electric typewriters are similar to standard typewriters but with an electronic motor taking the place of human energy. It is much faster than the standard m
i wants to know the methods and process of substitution and transposition cipher with examples.
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