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Microprocessor

Microprocessor
What is the size (in bytes) of Prefetch queue in 8086?

 3.
 4.
 2.
 6.

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Microprocessor
In a microcomputer , the address of memory locations are binary numbers that identify each memory circuit where a byte is stored. If a microcomputer uses 20-bit address, then numbers of different memory locations are

 220 - 1
 20
 220
 220-1

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Microprocessor
RST0 - RST7 are the __________ in 8085.

 software interrupts
 conditional interrupts
 logical interrupts
 hardware interrupts

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Microprocessor
The ROM programmed during manufacturing process itself is called

 EPROM
 MROM
 EEPROM
 PROM

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Microprocessor
While using a frequency counter for measuring frequency, two modes of measurement are possible: Period time Frequency mode There is a ‘cross-over frequency’ below which the period mode is preferred. Assuming the crystal oscillator frequency to be 4MHz, the crossover frequency is given by

 2 Mhz.
 8 Mhz.
 2 Khz.
 1Khz.

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Microprocessor
In one’s complement 8 bit representation 11111111 represents

1
+0
-0
-1

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