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Q. Programmed input - output technique for computers?
Programmed input/output is a useful I/O technique for computers where hardware costs need to be minimised. Input or output operation in these cases may involve:
a) Transfer of data from I/O device to processor registers.
b) Transfer of data from processor registers to memory.
With programmed I/O method responsibility of processor is to constantly check status of I/O device to check whether it's free or it has completed inputting data. So this method is quite time consuming where processor wastes so much time in checking and verifying status of an I/O device. Figure (a) gives an illustration of use of programmed I/O to read in a block of data from a peripheral device into memory.
Q. What is a virtual address? Von Neumann had suggested that execution of a program is possible only if program and data are residing in memory. In such a condition program len
The constructed datatype of C is known as Structure is a constructed datatype of C.
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Write an ALP to count positve and numbers from array.
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The Function code currently active is ascertained by what Variable? The function code at present active in a Program can be ascertained from the SY-UCOMM Variable.
implementation of threads
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