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Microprocessor

Microprocessor
Which of the following is not treated as hexadecimal constant by assembler in 8085?

45 H
6 AFH
64 H
234

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Microprocessor
SUB A instruction in 8085

 reset carry and sign flags
 sets zero and sign flags
 sets zero and carry flags
 reset zero and parity flags

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Microprocessor
The addressing mode in instruction PUSH B is

 register
 register indirect
 direct
 immediate

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Microprocessor
________used to implement the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by setting various bits to form masks or generate output data via the Serial Output Data (SOD) line.

 DI
 EI
 SIM
 RIM

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Microprocessor
A mask programmed ROM is

 programmed by the user
 erasable electrically
 programmed at the time of fabrication
 erasable and programmable

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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)

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

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