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Microprocessor

Microprocessor
In C the keywords are also called

Reserved words
Class words
Special words
Character words

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Microprocessor
In microprocessor based system I/O ports are used to interface

 all the I/O devices
 the I/O devices and memory chips
 the I/P device only
 the O/P devices only

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Microprocessor
_____________is used to read the status of the hardware interrupts (RST 7.5, RST 6.5, RST 5.5) by loading into the A register a byte which defines the condition of the mask bits for the interrupts.

 DI
 SIM
 RIM
 EI

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Microprocessor
In 8086, _______ uses a mechanism known as an instruction stream queue to implement a pipeline architecture.

 Bus Interface Unit (BIU)
 None of these
 Both ‘b’ and ‘c’
 Execution Unit (EU)

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Microprocessor
Assuming LSB is at position 0 and MSB at position 7, which bit positions are not used (Undefined) in flag register of an 8085 microprocessor?

 1, 3, 5
 1, 3, 4
 2, 3, 5
 1, 2, 5

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

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

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