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Microprocessor

Microprocessor
Which one of the following microprocessor is not an 8-bit microprocessor

 Z-80
 68000
 8085
 6502

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Microprocessor
In one’s complement 8 bit representation 11111111 represents

-0
1
-1
+0

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Microprocessor
A sequence of two registers that multiplies the content of DE register pair by two and stores the result in HL register pair (in 8085 assembly language) is

 XCHG & DAD B
 PCHL & DAD D
 XCHG & DAD H
 XTHL & DAD H

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

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

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Microprocessor
The stack pointer

 resides in RAM
 resides in microprocessor
 may be in RAM or ROM
 resides in ROM

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Microprocessor
In 8086 the number of bytes which can be addressed directly is about

100000
one million
10000
1000

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