Free Linux Foundation Certified System Administrator v5.0 Questions and Answers

Question 1

When a process is launched using the nice command, what is the default nice level?

Accepted Answer

10

Answer

The `nice` command is used to launch a process with a modified scheduling priority. When `nice` is executed without specifying a particular nice level (e.g., `nice command`), it defaults to a nice level of 10. A higher nice value indicates a lower priority, meaning the process will receive fewer CPU resources compared to processes with lower nice values.

Question 2

Why would someone use a screen reader?

Accepted Answer

It reads text displayed on the screen to blind or visually impaired people.

Answer

A screen reader is an assistive technology primarily designed to help blind or visually impaired individuals interact with digital content. It interprets and converts text and graphical elements displayed on a computer screen into speech or braille, enabling users to navigate interfaces and access information that would otherwise be inaccessible.

Question 3

What program is launched during a system boot cycle after the BIOS has finished its tasks?

Accepted Answer

The bootloader

Answer

After the BIOS completes its initial hardware checks and initialization, it transfers control to the bootloader. The bootloader (e.g., GRUB, LILO) is then responsible for loading the operating system kernel into memory and initiating the subsequent stages of the system boot process. The kernel is loaded *by* the bootloader, not directly by the BIOS.

Question 4

How may the environment variable FOOBAR be disabled for the sole purpose of running my script?

Accepted Answer

env -u FOOBAR./myscript

Answer

The `env` command allows you to run a command in a modified environment. The `-u` option specifically unsets a specified environment variable for the duration of the command's execution. Therefore, `env -u FOOBAR ./myscript` will run `myscript` with the `FOOBAR` variable temporarily unset, without affecting its state in the parent shell.

Question 5

Which of the following is a facility for syslog? (Select TWO right responses.)

Accepted Answer

local7

Answer

Syslog facilities are used to categorize messages by the type of program or system component that generated them. Both `mail` (for mail system messages) and `local7` (one of eight local-use facilities, `local0` through `local7`) are standard and commonly used syslog facilities. These categories help in filtering and routing log messages effectively.

LFCS Certification Practice Test

LFCS Certification Practice Test

Free Linux Foundation Certified System Administrator v5.0 Questions and Answers