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Microprocessor

Microprocessor
Identify the communication interfacing device from the following

 8257
 8251
 8255
 8155

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Microprocessor
The microprocessor may be made to exit from HALT state by asserting

 A or B or HOLD line
 READY line
 any of the five interrupt lines
 RESTART

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Microprocessor
Pick up the programmable interrupt controller from the following

 8279
 8259
 8275
 8257

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Microprocessor
Each instruction in an assembly language program has the following fields 1. Label field 2. Mnemonic field 3. Operand field 4. Comment field What are the correct sequence of these fields?

 2, 4, 1 and 3
 2, 1, 4 and 3
 1, 2, 3 and 4
 1, 3, 2 and 4

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

 PAL
 PROM
 PLA
 PLD

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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 has 5 interrupts lines, whereas 6800 has only two
 8085 uses I/O mapped I/O, whereas 6800 uses memory mapped I/O
 None

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