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Microprocessor

Microprocessor
Which of the following instruction will never affect the zero flag?

 ORA R
 DCX Rp
 DCR R
 XRA R

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Microprocessor
A combinational PLD with a fixed AND array and a programmable OR array is called a

 PROM
 PLA
 PAL
 PLD

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Microprocessor
The ROM programmed during manufacturing process itself is called

 PROM
 EEPROM
 MROM
 EPROM

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Microprocessor
The 8085 microprocessor uses a crystal of frequency 6.25 Mhz. The T-state value is

 1280ns
 320ns
 640ns
 960ns

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

 68000
 Z-80
 8085
 6502

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Microprocessor
S0 and S1 pins are used for

 acknowledging the interrupt
 indicating the processor’s status
 serial communication
None of these

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