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Microprocessor

Microprocessor
Which one of the following microprocessor has 16-bit data bus?

 Z-80
 6502
 68000
 8085

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Microprocessor
During the execution of the instruction, the ________tests the status and control flags and updates them based on the results of executing the instruction.

 Both ‘c’ and ‘d’
 Bus Interface Unit (BIU)
 None of these
 Execution Unit (EU)

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Microprocessor
Which one of the following interrupt/interrupts is/are only level triggering?

 RST 6.5
 RST 5.5
 both ‘a’ and ‘b’
 TRAP

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Microprocessor
Maximum number of I/O that can be addressed by the INTEL 8085 is

 512
 285
 256
 65536

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Microprocessor
A microprocessor without the interrupt facility

 cannot be interfaced with any I/O devices
 is best suited for process control system
 is not useful for process control system
 cannot be used for DMA operation

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Microprocessor
The five flags in 8085 are designated as

Z, C, S, P, AC
Z, CY, S, D, AC
D, Z, S, P, AC
Z, CY, S, P and AC

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