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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.
What do you understand by E-cash? E-Cash Ecash is a cash which is showed by two models. One is the on-line form of e-cash which permits for the completion of all types of
List all seven layer of OSI model and describe function of application layer. The layers of OSI model are as follows: (1) The Physical Layer: It defines an interface in
advantages and disadvantages of a header node
Convert decimal 153 to octal. Equivalent in octal will be ? Ans. (153) 10 = (231) 8
Microsoft access name has been transformed to Microsoft office access. This software incorporates relational database management system which joins GUI (graphical user interface) w
explain classification of computers in detail.also explain various application areas of computers
What are the aspects of CAD Increased use of computers has led to many of the above affects. Other aspects to consider include: - deskilling of the work force (for illustra
Define user space? The system space is divided from virtual address space in which the user application programs reside. The letter space is known as user space.
Q. Explain about Memory Buffer Register? Memory Buffer Register (MBR): It's a register that comprises the data to be written in memory (write operation) or it obtains the data
Q. Define Wide Area Network? Wide Area Network (WAN): It takes a large geographical area and frequently owned by a state. Data transfer rate is low (few KBPS to 10 MBPS) and er
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