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Microprocessor

Microprocessor
Which of the following is a valid integer constant?

125 + 3
127
127
127

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Microprocessor
How many T-states are required for execution of OUT 80H instruction?

 16
 10
 7
 13

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Microprocessor
Identify the communication interfacing device from the following

 8251
 8155
 8255
 8257

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Microprocessor
If the number of address bits in a memory is reduced by 2 and the addressability is doubled, the size of the memory (i.e., the number of bits stored in the memory)

Doubles
Remains unchanged
Increases by 2^(address bits)/addressability
Halves

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Microprocessor
Maximum number of I/O that can be addressed by the INTEL 8085 is

 256
 285
 65536
 512

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Microprocessor
The instruction set of a microprocessor

 is stored inside the microprocessor
 is specified by the manufacturers
 cannot be changed by the user
 is specified by the user

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