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CompTIA® Linux+ / LPIC-1 Cert Guide: (Exams LX0-103 & LX0-104/101-400 & 102-400) by Sean Walberg, Ross Brunson

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Review Questions

1. B. B is correct because direct memory access lets the peripheral talk directly to memory. A is incorrect because an interrupt request is a signal from the peripheral to the CPU that it needs attention. C is incorrect because the Transmission Control Protocol is a network concern. D is incorrect because it is not a hardware matter.

2. D. D is correct because lsdev shows information about system resources including devices, IO ports, and DMA channels.

3. C. C is correct because the IRQ is a signal to the processor. A is incorrect because IO ports are used by the CPU to talk to the device. B is not correct because pushing to memory does not involve the CPU. D is incorrect because devices don’t execute code out of main memory. ...

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