02

Question 1

____________ Implements file and file system related interfaces provided to user mode programs.

Answer 1

VFS

Question 1

___________ Part of process management that shares CPU time between multiple LWPs.

Answer 1

Scheduler

Question 2

____________ Elements of the Linux kernel that an architecture must use for normal operations and efficiency.

Answer 2

Board Support Package

Question 3

_____________ Ensures the proper and timely execution of processes.

Answer 3

process management

Question 4

__________ Provides an API to resources that send data across a network.

Answer 4

network subsystem

Question 5

______ Converts a process running in user mode to a protected kernel mode process.

Answer 5

SCI

Question 6

_________________ This component of the Linux architecture runs in the most privileged ring (0).

Answer 6

Kernel Mode

Question 7

____________ This component of the Linux architecture runs in the least privileged ring (3).

Answer 7

User Mode

Question 8

The application that actually makes the Linux OS work is the ________________ software, consisting of a GUI, compilers, shells, tools, and editors.

Answer 8

GNU software

Question 9

Libraries fall under the ______________ mode (user or kernel) of the Linux OS.

Answer 9

user mode

Question 10

______________ Contains the SCI and handles mappings between user requests and device driver actions. It also manages system resources and performs system services.

Answer 10

Kernal Mode

Question 11

______________ Computer programs used to perform certain tasks, functions, or activities and originate in user mode.

Answer 11

Applications

Question 12

__________ This mode includes components such as shells, Linux commands, utilities, and user application programs.

Answer 12

User mode

Question 13

_________ An implementation of the standard C library used by many operating systems and programs on those systems.

Answer 13

GNU-C

Question 14

__________ When memory is exhausted and pages of memory are moved onto the disk.

Answer 14

Swapped

Question 15

__________ The most common API for UNIX based systems that closely resemble those of the C library.

Answer 15

POSIX

Question 16

___________ A low-level program allowing the kernel to communicate with a particular piece of hardware.

Answer 16

Device Driver

Question 17

__________ A catastrophic kernel crash that halts the entire PC.

Answer 17

Kernal panic

Question 18

_________ Applications that make the OS work. (e.g., GUI, compilers, tools, and editors)

Answer 18

GNU Software

Question 19

_______ Command used to displays file system type. (e.g., Ext, UFS, NTFS, …)

Answer 19

blkid

Question 20

_________ Command used to dump the contents of the DMI table to the screen in human-readable format.

Answer 20

dmidecode

Question 21

_________ The file from where the init daemon gets its instructions (full path).

Answer 21

/etc/inittab

Question 22

________ Initial root file system with limited directories and executables.

Answer 22

initrd

Question 23

Linux process that spawns a login.

Answer 23

getty

Question 24

Command and option used to verify current run level.

Answer 24

who -r

Question 25

Directory where master copies of the startup scripts reside. (full path)

Answer 25

/etc/init.d

Question 26

Command used to change current run level.

Answer 26

init

Question 27

Command that updates and queries run level information for system services.

Answer 27

chkconfig

Question 28

Command and option to retrieve information from a listing of available shells in the /etc/shells file.

Answer 28

chsh -l

Question 29

Command that provides a description of the system's hardware components.

Answer 29

dmidecode

Question 30

More secure but less controllable system initialization manager.

Answer 30

systemd

Question 31

Init manager where run-levels dictate the start up environment.

Answer 31

SySV

Question 32

Modified SysV initialization manager, used by CentOS Version 6.

Answer 32

upstart

Question 33

Command that starts, stops, or restarts many services located in /etc/init.d.

Answer 33

service

Question 34

Location of network-based services that fall in the xinetd category. (full path)

Answer 34

/etc/xinetd.d

Question 35

_______ Systemd command used to enable, start, stop, or disable services.

Answer 35

systemctl

Question 36

What are each of the componenets of User Mode? 7 components

Answer 36

applications windows manager processes libraries utility programs commands shells

Question 37

Order of Linuix Boot phase Runlevel(/etc/rc.d/rc*.d/ Kernel Init GRUB MBR BIOS

Answer 37

BIOS MBR GRUB KERNEL INIT RUNLEVEL

Question 38

What are the two types of device drivers?

Answer 38

permanent and modular

Question 39

Which file contains configurations for kernel and initrd images?

Answer 39

grub.conf