COMPTIA A+ Practice Exam

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What is the default IRQ for COM1?

  1. 4

  2. 3

  3. 7

  4. 5

The correct answer is: 4

The default IRQ (Interrupt Request) for COM1 is 4. This is the standard setting for most PC's and is used for serial port communication (connecting devices such as modems, printers, and mice). The other options (B 3, C: 7, D: 5) are not the default IRQ for COM1 and are typically used for other devices such as parallel ports, audio controllers, and USB controllers. It is important to know the default IRQ for COM1 in order to properly troubleshoot and configure devices connected to this port.

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