Discussion
Strobe and Handshaking are mechanisms used to solve problems associated with :
Answer: D
Strobe and handshaking solve the problems of Asynchronous I/O synchronization.
When the CPU and an I/O device run on independent clocks, the transfer is asynchronous, and the receiver has no common clock to tell it when valid data is on the bus. Control signals have to coordinate the timing. In the strobe method one unit pulses a strobe line to say when data is valid. In handshaking, a second control line lets the receiver acknowledge that it has taken the data, so each step is confirmed.
The problem these mechanisms address is therefore timing coordination, synchronisation, in asynchronous transfer. Synchronous transfer needs neither, because both units share a clock.
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