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Microprocessor

Microprocessor
Pick up the programmable interrupt controller from the following

 8259
 8257
 8279
 8275

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

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

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Microprocessor
The stack pointer

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

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Microprocessor
Identify the communication interfacing device from the following

 8257
 8255
 8155
 8251

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Microprocessor
Which one of the following circuits transmits two messages simultaneously in one direction

 Quadruplex
 Diplex
 Duplex
 Simplex

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Microprocessor
The word size of 8085 microprocessor is

 4-bit
 8-bit
 16-bit
 20-bit

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