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Microprocessor

Microprocessor
The maximum number of seven segment displays that can be connected to 8279 is

 18
 8
 16
 12

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Microprocessor
The stack is nothing but a set of

 reserved I/O address space
 reserved ROM address space
 reserved RAM address space
None of these

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Microprocessor
DMA signal/signals in 8085 is/are

 READY.
 HOLD.
 All.
 HLDA.

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Microprocessor
The content of the A15-A8 (higher order address lines) while executing “IN 8-bit port address” instruction are

 same as the content of A7-A0
 all bits reset (i.e. 00H)
 irrelevant
 all bits set (i.e. FFH)

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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)

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

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Microprocessor
The addressing mode in instruction PUSH B is

 immediate
 register indirect
 register
 direct

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