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Microprocessor

Microprocessor
Which one of the following circuits transmits two messages simultaneously in one direction

 Diplex
 Quadruplex
 Duplex
 Simplex

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Microprocessor
Inintel 8085A microprocessor ALE signal is made high to

 Enable the data bus to be used as low order address bus
 To achieve all the functions listed above
 To latch data D0-D7 from data bus
 To disable data bus

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Microprocessor
The control flags in 8086 are:

All of these
 the direction flag(DF).
 the Trap flag(TF).
 the interrupt flag(IF).

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Microprocessor
S0 and S1 pins are used for

 acknowledging the interrupt
None of these
 serial communication
 indicating the processor’s status

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Microprocessor
The first machine cycle of an instruction is always

 An I/O read cycle
 A memory write cycle
 A fetch cycle
 A memory read cycle

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Microprocessor
IC 7485 cannot be cascadeD.

False
True

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