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Microprocessor

Microprocessor
The minimum number of transistors required to implement a two input AND gate is

6
8
2
4

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Microprocessor
In 8085, the pins for SID and SOD are

4 and 5 respectively
4 and 3 respectively
3 and 4 respectively
5 and 4 respectively

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

 1280ns
 960ns
 320ns
 640ns

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

 XRA R
 DCX Rp
 ORA R
 DCR R

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Microprocessor
A microprocessor without the interrupt facility

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

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Microprocessor
Assuming LSB is at position 0 and MSB at position 7, which bit positions are not used (Undefined) in flag register of an 8085 microprocessor?

 1, 3, 5
 2, 3, 5
 1, 2, 5
 1, 3, 4

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