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Microprocessor

Microprocessor
Number of Hex digits needed to represent the 20-bit address of a memory location are

 20
 4
 5
 16

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

 Simplex
 Quadruplex
 Diplex
 Duplex

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Microprocessor
How many machine cycles are required for execution of IN 30H instruction

 5
 3
 4
 6

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Microprocessor
Identify the programmable interval timer from the following

 8279
 8253
 8252
 8275

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Microprocessor
After RESET 8255 will be in

 mode 0; all ports are output
 unchanged condition
 mode 2
 mode 0; all ports are input

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Microprocessor
The 8085 microprocessor enters into bus idle machine cycle whenever

 INTR interrupt is recognized
None of these
 RST 7.5 is recognized
 DAD RP instruction is executed

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