Why is it that a single serial port is controlled by a single interrupt-driven I/O (input/ output), but a front-end processor, such as a terminal concentrator, is managed by a polling I/O? Answer this in context to OS.

Why is it that a single serial port is controlled by a single interrupt-driven I/O (input/ output), but a front-end processor, such as a terminal concentrator, is managed by a polling I/O? Answer this in context to OS.

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: easy

标签: interviewbit, deloitte, company-specific

目标公司: Deloitte

参考答案摘要

Interrupt is a hardware method by which a device alerts the CPU that it needs its attention. Interruptions might happen at any time. As a result, when the CPU receives an interrupt signal over the ind...

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