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Microprocessor

Microprocessor
In 8086 the number of bytes which can be addressed directly is about

1000
one million
10000
100000

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 all bits reset (i.e. 00H)
 same as the content of A7-A0
 irrelevant
 all bits set (i.e. FFH)

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

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

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Microprocessor
The cycle required to fetch and execute an instruction in a 8085 microprocessor is which one of the following?

 Memory cycle
 Instruction cycle
 Machine cycle
 Clock cycle

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Microprocessor
Assertion(A): Address bus is unidirectional. Reason(R): Data bus is bidirectional

 A is true but R is false
 Both A & R are true but R is not the correct explanation of A
 Both A & R are true and R is the correct explanation of A
 A is false but R is true

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Microprocessor
In 8085 which addressing mode is also called inherent addressing?

Immediate
Register
Direct
Implicit

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