Test your basic knowledge |

Unix Operating System

Subject : it-skills

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. User space (outer ring) - the area in memory where user processes run and Kernel space (inner ring) - where kernel services are provided via kernel processes
sysctl -a
UNIX "Rings of Protection"
Apache Document Root
Group Descriptor Table

2. Command used on a Linux system to view the disk's physical partitioning scheme
Hardware Layer
fdisk -l
Low level file I/O
Spawned

3. The hardware device responsible for handling memory accesses requested by the processor
Memory Management Unit (MMU)
Interrupt handlers
rpcinfo -p
df -h

4. Presents each user with a prompt - executes user commands - and supports a custom environment for each user
Inode
Group Descriptor Table
Shell
Loadable Kernel Modules (LKM)

5. In Linux - the command that controls NFS function
Block File
openldap-servers
Hard Link - with syntax
/sbin/service

6. Command in Linux that shows the status of loadable kernel modules that are currently loaded
df
df
lsmod
Init Phase

7. Daemon that is used for viewing network services in Linux - has more customization than the Solaris counterpart
Memory Management Unit (MMU)
/etc/xinetd.d
openldap-clients
df -h

8. Default shell for most *Nix systems
init and telinit
df -v
bash
free

9. The web server widely used in the public domain that was based off of a UNIX Web server
start /sbin/init process
Apache
PATH=$PATH:/xxx/xxx/bin
share -F nfs /<path>

10. Terminal Interrupt via user keypress
SIGINT 2
prtconf
who -r
User Layer

11. LDAP package that contains the libraries necessary to run the Open LDAP server
openldap
Kernel Layer
'#'
Apache Document Root

12. Command will show your used and free inodes
Kernel Layer
df -k
df -F ufs -o i
groupdel

13. Four Ext* _________: Modify - Access - Change - Delete
nmbd
mmap()
File Timestamps
useradd -n

14. Device file for devices such as the terminal - tape drive - printer - etc; located in the /dev/rdsk directory
Symbolic Link - with syntax
smbd
System Call Interface
Character File

15. Converts a process running in user mode to a protected kernel mode process
LDAP Data Interchange Format (LDIF)
Berkeley Internet Name Daemon (BIND)
sh
System Call Interface

16. Two Ordinary File Types: Text and ______
fdisk -l
Network Information Service Plus (NIS+)
Binary
dmesg

17. Command used to delete a group
groupdel
unlink()
Group Descriptor Table
Restricted Shell

18. These are found within the kernel layer at the level closest to the hardware
shareall
before /etc/profile
Hardware Interface Modules
bash

19. Command to view your swap partition in human readable format
Data Block
/etc/resolv.conf
I/O services
df -h

20. Provides the interface to allow user programs to access kernel functions
umask
System call
who -r
Kernel Layer

21. Converts a process running in user mode to a protected kernel mode process
Hardware Address Translation (HAT)
inetd -t
df -F ufs -o i
System Call Interface

22. Command used to switch to a new group before creating a file that would be used by a different current group - similar to 'su'
newgroup
nmbd
Boot Prom Phase
HOME Vaiable

23. Controls the hardware that manages mapping of virtual to physical memory
Interrupt
groupdel
3 - Multi-User Mode
Hardware Address Translation (HAT)

24. Sysdef parameter that defines the maximum number of processes that will run on the system
Ordinary File
free
5 - Multi-user Mode
max_nprocs

25. Default Run Level for Linux
df -v
UNIX "Rings of Protection"
User to Kernel Transition Process
5 - Multi-user Mode

26. Displays default values when adding a new user with no options
useradd -D
UNIX "Rings of Protection"
rpcinfo -p
'#'

27. Applys changes to /etc/sysctl.conf
sysctl -p
SUID/SGID
inetd -t
Run-level Field

28. LDAP package that contains command line tools for viewing/modifying directories on an LDAP server
Boot Prom Phase
Device Driver
openldap-clients
Group Descriptor Table

29. Four Fields of /etc/inittab: Label Name - __________ - Action - Command
Run-level Field
showmount -e <ip address>
SIGTERM 15
/etc/shadow

30. Similar to -k; shows block size for each mounted file system
Process scheduling
Hardware Layer
Kernel Layer
df -v

31. This Layer contains the system call interface and handles the mapping between user request and device driver actions - as well as converting user system calls to kernel service calls
Restricted Shell
Kernel Layer
System call
Apache

32. Daemon that lists port/service mappings
who -r
/etc/services
id
Shell

33. Four Phases of the Solaris Boot Process: _______ - Boot Programs - Kernel - and Init
Boot Prom
Init Phase
Data Block
mount -F nfs hostname:directory / <mount point>

34. Command that displays the names of the kernel parameters and their current values
3 - Multi-User Mode
df -k
sysdef
Process scheduling

35. Allow the user to share file systems among networked connections
Six Superblock Components
Network File System (NFS)
Hard Link - with syntax
ufsboot

36. Command to view your swap partition
df -h
df -k
id
Six Superblock Components

37. Allows a device driver to be linked into and removed from the kernel while it is running
HOME Vaiable
df -k
/etc/resolv.conf
Loadable Kernel Modules (LKM)

38. Command that displays the amount of free and used memory
Three Types of Signals
Text File
free
/etc/passwd

39. An Internet protocol that email and other programs use to look up information from a server
Environment
SIGTERM 15
Kernel Phase
Lightweight Directory Access Protocol (LDAP)

40. File that maps IP addresses to hostnames and aliases
3 - Multi-User Mode
init and telinit
/etc/hosts
sysctl

41. Phase where the kernel initializes itself and begins loading modules using ufsboot. Once finished - it unmaps ufsboot
Kernel Phase
Device File
nmbd
SIGTERM 15

42. Low Level File I/O Calls: creat() - open() - close() - read() - write() - _______ - removes directory entry
unlink()
Block File
telinit -q
Signals

43. The hardware device responsible for handling memory accesses requested by the processor
prtconf
df -F ufs -o i
Apache Directory Structure
Memory Management Unit (MMU)

44. Extra permission bit that allows anyone to run a program with the same privileges as its owner or group - denoted by *
prtconf
sysctl -w
SUID/SGID
df -F ufs -o i

45. Phase with a sole function of loading the secondary boot program - ufsboot - and executing it
sysctl -p
Boot Programs Phase
touch -m/-a
Kernel Phase

46. Surest kill
lo0
SIGKILL 9
User Layer
kill (sig -pid)

47. In Solaris - this shares the filesystem pointed to the <path> - where -F identifies the file system type
Superblock
Trap
share -F nfs /<path>
Inode

48. Three Device ____________: prtconf - sysdef - dmesg
User Layer
Information Commands
Init Phase
Ext*

49. 5 Common Solaris/Linux _______: SIGHUP - SIGINT - SIGQUIT - SIGKILL - SIGTERM
Samba
/etc/hosts
SIGTERM 15
Signals

50. Two Types of Variables: Local and ________
sysctl -p
Interrupt
Network Information Service Plus (NIS+)
Environment