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Why must a modem be used to transmit binary data through a PSTN? (1) Use sketches and additional text to describe the following modulation methods. (a) Amplitude shift keying (b) Frequency shift keying (2) Discuss the factors that influence the choice of carrier frequency and the bandwidth used by the demodulator section of a modem.
What are the various mechanisms for implementing I/O operations? a) Program controlled I/O b) Interrupts c) DMA
When calling an external report the parameters or select-options specified in the external report cannot be called.
Difference between relocatable and self relocatable programs. A relocatable program is one which can be processed to relocate it to a selected area of memory. For illustratio
Device drivers are special programs installed by config.sys file to control installable devices. So personal computers can be expanded at some future time by installation of new d
What''s is a lissajious pattern?
Q. How is an instruction represented? Instruction is signified as a sequence of bits. A layout of an instruction is called as instruction format. Instruction formats are princi
How many two input AND gates and two input OR gates are required to realize Y = BD+CE+AB ? Ans. Here three product terms, therefore three AND gates of two inputs are needed.
What is the use of isolated I/O configuration. In isolated I/O configuration the CPU has distinct input and output instructions and each of these instructions is associated wi
Q. Show the Comparison of ASCII and EBCDIC? EBCDIC is an easier to employ code on punched cards due to BCD compatibility. But ASCII has some of major benefits on EBCDIC. These
When designing a logic circuit with multipleoutputs it is usual to treat it as several circuitseach with one output. So for our example wewould design three circuits; one with outp
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