online test series

Question

A DMA module is transferring characters to memory using cycle stealing mode, from a device which is transmitting at a rate of 19200 bps. The rate at which processor is fetching the instruction is 2 million instructions per second (2 MIPS). Due to DMA, CPU slowed down by ______ (in μsec, upto 2 decimal places).

Comments

$\frac{1}{2*417} * 100 %$ = 0.12% slow

Stalling book exercise QS, here they manipulated the processor and IO speed by two times.

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Debashish sir

Same I getting but solution given as

0.11

Answer 1

transmitting rate is 19200 bps, let us say if there are 8 bits/char or byte

19200/8=2400

% slow rate = (2400/2*10⁶)*100

=0.12