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There are five interrupt input TRAP,RST 75,SRT 65,RST 55 and IWTR.

TRAP is a nonmaskable interrupt, that is, it cannot be disabled by an instruction

RST75,65,55 and INTR are maskable interrupt i.e. they can be enabled or disabled by software.

http://gradestack.com/Microprocessors-and/Interrupts-of-8085/Classification-Of/19314-3912-38133-study-wtw

Ans. (c) TRAP

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Interrupts are the signals generated by the external devices to request the microprocessor to perform a ask. There are 5 interrupt signals. Given low priority to high is
1. INTR
2. RST 5.5
3. RST 6.5
4. RST 7.5
5. TRAP
Maskable Interrupts: They can be enabled or disabled by software INTR,RST 5.5,RST 6.5 and RST 7.5
Un maskable Interrupts: TRAP

Answer:

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