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Microprocessor

Microprocessor
The five flags in 8085 are designated as

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

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Microprocessor
In one’s complement 8 bit representation 11111111 represents

+0
-1
1
-0

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Microprocessor
Which components are NOT found on chip in a microprocessor but may be found on chip in a microcontroller?

 EPROM, USART & PORTS
 EPROM & PORTS
 SRAM, EPROM & PORTS
 SRAM & USART

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Microprocessor
The operations executed by two or more control units are referred as

 Multi-operations
 Bi control-operations
 Macro-operations
 Micro-operations

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Microprocessor
The reason for the presence of ALE pin in 8085, but not in 6800 is that

 8085 uses I/O mapped I/O, whereas 6800 uses memory mapped I/O
 8085 has 5 interrupts lines, whereas 6800 has only two
 None
 8085 has multiplexed bus, whereas 6800 does not have

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Microprocessor
After RESET 8255 will be in

 mode 0; all ports are output
 mode 2
 mode 0; all ports are input
 unchanged condition

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