010-160 Hardware and Operating Systems 5

Question 1

What is the purpose of the lsmod command?

Accepted Answer

Display currently loaded kernel modules

Answer

lsmod shows the status of all currently loaded kernel modules, including their size and usage count.

Question 2

Which hardware component determines the maximum speed at which data can be transferred between the CPU and RAM?

Accepted Answer

The memory bus speed and RAM type

Answer

The memory bus speed and RAM type (e.g., DDR4-3200) determine the maximum bandwidth available between the CPU and system memory.

Question 3

In Linux, what type of file is /dev/sda?

Accepted Answer

A block device file representing a storage device

Answer

/dev/sda is a block device file that represents the first SCSI/SATA disk; the kernel uses it to communicate with the storage device.

Question 4

What is the purpose of cache memory (L1, L2, L3) in a CPU?

Accepted Answer

Store frequently accessed data closer to the CPU to reduce latency

Answer

CPU cache levels (L1, L2, L3) store frequently used data and instructions near the processor to avoid slower main memory accesses.

Question 5

Which file would you read to find the Linux kernel version currently running on a system?

Accepted Answer

/proc/version

Answer

/proc/version contains the kernel version string, build date, and compiler information for the running kernel.

(010-160) LPI Linux Essentials Practice Test