Microprocessor
At the beginning of a fetch cycle, the contents of the program counter are

 transferred to memory data register.
 transferred to memory address register .
 transferred to address bus.
 incremented by one.

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

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

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