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

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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 have 8-bit address line
 Devices are accessed using IN and OUT instructions

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Microprocessor
A good assembly language programmer should use general purpose registers rather than memory in maximum possible ways for data processing. This is because:

 Data processing with memory requires more instructions in the program than that with registers
 Of limited set of instructions for data processing with memory
 Data processing with registers is easier than with memory
 Data processing with registers takes fewer cycles than that with memory

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