ITPEC FE Morning April 2020 Question 10
ITPEC FE Morning April 2020 — Question 10 of 80
Internal vs External Interrupts — classify interrupt sources by origin.
Internal interrupt (синоним: exception, trap) — generated by the CPU itself during instruction execution:
- Division by zero
- Overflow
- Invalid opcode
- Page fault
External interrupt — generated by hardware outside the CPU:
- I/O completion signal
- Power failure
- Timer tick
- Memory parity error
Key rule: If the CPU detects the problem while executing an instruction → internal. If a signal comes from outside hardware → external.
Why not others:
- (a) Power loss — external hardware event, not caused by instruction execution
- (c) I/O completion — signal from an I/O device controller (external)
- (d) Memory parity error — detected by memory hardware, not by CPU during instruction execution
Answer: (b)
AI-generated — may contain errors
The original exam layout is preserved in the image so diagrams, formulas, tables, and code remain accurate.
This question comes from an official ITPEC past paper. ITPEC Practice is an independent study tool and is not affiliated with ITPEC. See the official FE past-paper collection or Report an issue.