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Microprocessor

Microprocessor
The five flags in 8085 are designated as

Z, C, S, P, AC
D, Z, S, P, AC
Z, CY, S, P and AC
Z, CY, S, D, AC

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Microprocessor
Each instruction in an assembly language program has the following fields 1. Label field 2. Mnemonic field 3. Operand field 4. Comment field What are the correct sequence of these fields?

 1, 3, 2 and 4
 2, 4, 1 and 3
 1, 2, 3 and 4
 2, 1, 4 and 3

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Microprocessor
The data bus of any microprocessor is always

 Either unidirectional or bi-directional
 Bi-directional
 Unidirectional
 None

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Microprocessor
How many bytes in a zero memory page should be reserved for vectors used by RST instructions?

 128.
 64.
 16.
 32.

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Microprocessor
In 8085 microprocessor which one of the following statement is wrong

 serial I/O is possible through SIM and RIM instruction
 serial I/O is not possible
 there is a pin available for serial input
 there is a pin available for serial output

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

 Simplex
 Duplex
 Quadruplex
 Diplex

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