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RRB Junior Engineer / DMS / CMA 2019 · Question 3617 of 3719

Which of the following interrupts is non-maskable in 8085 microprocessor?

  1. ARST 6.5
  2. BTRAPCorrect
  3. CRST 5.5
  4. DINTR

Answer: B. TRAP

Explanation

Concept Maskable Interrupts They are those which can be disabled or ignored by the microprocessor. These interrupts are either edge-triggered or level-triggered, so they can be disabled. INTR, RST 7.5, RST 6.5, RST 5.5 are maskable interrupts in 8085 microprocessor Non-Maskable Interrupts They are those which cannot be disabled or ignored by microprocessor. TRAP is a non-maskable interrupt. It consists of both level as well as edge triggering and is used in critical power failure conditions Therefore correct answer is Option 2

Source: RRB JE 2019 (CBT 2) (IT) Previous Year Paper (30 Aug 2019) — prepp.in solved-paper PDF (answer key with explanations) · reliable-secondary

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