Microprocessor
In microprocessor based system I/O ports are used to interface

 the I/P device only
 all the I/O devices
 the O/P devices only
 the I/O devices and memory chips

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Microprocessor
Assertion(A): Ready signal of microprocessor is used to detect whether a peripheral is ready for the data transfer or not. Reason(R): In the microprocessor during data transfer operations, the wait states are added by forcing the ready signal low.

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

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Microprocessor
A microprocessor is ALU

 and control unit on a single chip.
 register unit and I/O device on a single chip.
 register unit and control unit on a single chip.
 and memory on a single chip.

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Microprocessor
The stack pointer register in a microprocessor

 keeps the address of the next instruction to be fetched
 holds the address of the top of the stack
 counts the number of instructions being executing on the microprocessor
 counts the number of programs being executing on the microprocessor

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Microprocessor
Assertion (A): Each memory chip has its own address latch. Reason (R): ALE signal comes out of microprocessor 8085 and goes to memory chip.

A is correct R is wrong
Both A and R are correct but R is not correct explanation of A
Both A and R are correct and R is correct explanation of A
A is wrong R is correct

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