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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.
Compare the use of switch statement with the use of nested if-else statement. If-else statement: When there are many conditional statements that may all evaluate to true, bu
Given a four level hierarchical storage system consisting of: cache, primary storage, secondary storage, and tertiary storage. Suppose the following: programs may be executed on
Can the size of an array be declared at runtime? No, the size of an array can't be declared at run time, we always require to mention the dimensions of an array at
Types of Addressing Modes: Each instruction of a computer mentions an operation on certain data. There are many ways of specifying address of the data to be operated on. These
Explain advantageand disadvantages of a dynamic document. The chief advantages of a dynamic document lie in its capability to report current information. For illustratio
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What is Expansion swap? At the time when any process needs more memory than it is currently allocated, the Kernel performs Expansion swap. To do this Kernel reserves enough spa
Q. Editor - Tools necessary for assembly language programming? The editor is a program which allows the user to enter and modify as well as store a group of instructions or tex
Q. Executing a parallel algorithm? Multiple processors need synchronization with one another when executing a parallel algorithm. So task which is running on processor X may ha
Which method is used for resolving data dependency conflict by the compiler itself? (A) Delayed load. (B) operand forwarding. (C) Pre fetch target instruction. (D) loo
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