Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

A systems engineer is explaining to a trainee why tools such as mkfs and mount require a disk device node (for example, /dev/nvme0n1) to be a block device. Which statement correctly describes a property that distinguishes block devices from character devices in Linux?

  • Data is delivered to user space byte-by-byte with no caching, making them ideal for terminals.

  • Their device nodes are marked with a leading c when listed with ls -l.

  • They cannot be used with the read(2) or write(2) system calls.

  • The kernel provides buffered, random-access I/O in fixed-size blocks, allowing filesystems to be mounted.

CompTIA Linux+ XK0-006 (V8)
Services and User Management
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