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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.
Discuss the advantages of Firewalls Firewalls also offer additional protection to local users who like to browse or surf out from the Intranet to the Internet, by acting as pro
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
When web pages containing emails are sent out they are prefixed by MIME Header. Why? Primarily email consisted messages having simple text written into English and expressed in
In a for loop, if the condition is missing, then, It is supposed to be present and taken to be true.
What are the user interfaces of interactive lists? If you require the user to communicate with the system during list display, the list must be interactive. You can describe
Define ROM? It is a non-volatile memory. It includes only reading of stored data.
Q. Develop a Menu driven program with following menu: 1. Octal to Decimal 2. Octal to Hexadecimal 3. Octal to Binary
Swing is a GUI toolkit for Java. It is one kind of the Java Foundation Classes (JFC). Swing haves graphical user interface (GUI) widgets such as text boxes, buttons, split-panes, a
Which scheduling policy is most suitable for a time-shared operating system? Ans. Round-Robin scheduling policy is most appropriate for a time-shared operating system.
Q. Explain about Microcomputers? Microcomputers: A microcomputer's CPU is a microprocessor. They are characteristically used as single usercomputer though present day microco
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