COMPTIA A+ Practice Exam

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What is the default IRQ for COM2?

  1. 4

  2. 3

  3. 7

  4. 2

The correct answer is: 3

While COM1 typically uses IRQ4, COM2 uses IRQ3 as its default. This is because COM1 is considered the primary serial port and therefore has higher priority, so it is assigned a lower IRQ value. COM2 is considered the secondary port and is assigned a higher IRQ value. Therefore, options A, C, and D are incorrect as they do not correspond to the default IRQ value for COM2.

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