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.

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

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Microprocessor
In 8085 microprocessor system with memory mapped I/O, which of the following is true?

 There can be maximum of 256 input devices and 256 output devices
 Arithmetic and logic operations can be directly performed with the I/O data
 Devices are accessed using IN and OUT instructions
 Devices have 8-bit address line

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