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. Secondary boot program that locates and load the basic kernel
ufsboot
Apache Directory Structure
kill (sig -pid)
Directory File

2. 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
UNIX "Rings of Protection"
Boot Prom
I/O services
Hardware Layer

3. Four Fields of /etc/inittab: Label Name - __________ - Action - Command
/etc/inetd.conf
5 - Multi-user Mode
Run-level Field
Apache Document Root

4. Four Ext* _________: Modify - Access - Change - Delete
Kernel Phase
df -k
File Timestamps
df -k

5. Command that displays the amount of free and used memory
Symbolic Link - with syntax
UNIX "Rings of Protection"
free
/etc/init.d

6. Two Daemons in Samba for _____ : smbd and nmbd
/etc/inetd.conf
CIFS
before /etc/profile
Three Types of Signals

7. Command used to convert/sync information in the /etc/passwd and /etc/shadow files
sysdef
prtconf
pwconv
/etc/xinetd.d

8. Surest kill
getty and ttymon
df
SIGKILL 9
System call

9. Two Servers in openldap-servers: /usr/sbin/slapd and ________
groupadd
openldap-clients
telinit -q
/usr/sbin/slurpd

10. 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
HOME Vaiable
showmount -e <ip address>
Ext*
Kernel Layer

11. The profile in UNIX that all users get _______ using their own profile
df -k
UNIX "Rings of Protection"
Init Phase
before /etc/profile

12. Three Steps of Kernel Phase: Create a user process - __________ - and starts other processes by reading /etc/inittab
showmount -e <ip address>
System Call Interface
start /sbin/init process
uname()

13. Hangup - restarts a daemon
Init Phase
SIGHUP 1
System Call Interface
Information Commands

14. Command that verifies the current run-level
who -r
SIGINT 2
Kernel
lsmod

15. Gives UNIX/Linux users the ability to access shared resources on Windows machines by implementing CIFS
/etc/passwd
Samba
inetd.d
5 - Multi-user Mode

16. Command that displays the amount of free and used memory
lo0
/etc/group
free
smbd

17. Polls the /etc/inittab file after it has been modified
telinit -q
System Call Interface
SIGQUIT 3
Device File

18. Applys changes to /etc/sysctl.conf
sysctl -p
df -F ufs -o i
Network File System (NFS)
dmesg

19. Loopback interface in ifconfig
System call
lo0
ufsboot
Restricted Shell

20. Phase that runs self diagnostics and verifying the system's hardware and memory - as well as POST - building the device tree - displaying the system banner - and running bootblk
Kernel Layer
who -r
useradd -D
Boot Prom Phase

21. Command used to view RPC services and their appropriate ports
Memory Management Unit (MMU)
rpcinfo -p
df -v
Run-level Field

22. Command that verifies the current run-level
Apache Error Log
who -r
Boot Prom
getty and ttymon

23. Where the main log files reside - including the Access_log and Error_log
Apache Error Log
Hardware Layer
User Layer
5 - Multi-user Mode

24. In Linux - the command used to see if there is an exported file system running on a machine
/etc/services
showmount -e <ip address>
Ordinary File
prtconf

25. An Internet protocol that email and other programs use to look up information from a server
Lightweight Directory Access Protocol (LDAP)
Trap
shareall
Shell

26. Similar to DLLs in Windows that can be built upon and around system calls
Binary File
Inode Table of Contents
Library Function
inetd -t

27. 'K' and 'S' in rc scripts: K is Kill - S is _______
Spawned
sysctl
/etc/apache/httpd.conf
Inode

28. Extra permission bit that allows anyone to run a program with the same privileges as its owner or group - denoted by *
/etc/hosts
Boot Prom
SUID/SGID
max_nprocs

29. File that maps IP addresses to hostnames and aliases
Init Phase
openldap-clients
/etc/hosts
groupdel

30. Presents each user with a prompt - executes user commands - and supports a custom environment for each user
pwconv
User Layer
Shell
File System

31. 4 Kernel Layer Functions: Process creation and termination - ________- file/disk access services - terminal handling services
Hardware Interface Modules
groupdel
Three Types of Signals
I/O services

32. Terminal Interrupt via user keypress
getty and ttymon
Interrupt
SIGINT 2
PATH=$PATH:/xxx/xxx/bin

33. These are found within the kernel layer at the level closest to the hardware
useradd -m
Hardware Interface Modules
mount -F nfs hostname:directory / <mount point>
SIGHUP 1

34. Shows all possible parameters
modinfo
sysctl -a
Inode
Ordinary File

35. In Solaris - the command that shows a machine with an exported file system
showmount -e <ip address>
df -F ufs -o i
Shell
Ordinary File

36. Two Types of _______________: Root (AKA Boot) and Swap
socket()
useradd -n
prtconf
File System Structures

37. The command to report file system disk space usage
Shell
df
Boot Prom Phase
Ext* File System

38. File that inetd daemon gets it's instructions from - maintains a file format that is the same across all platforms
Binary (already built/compiled)
/etc/inetd.conf
Signals
Kernel Layer

39. Allows a device driver to be linked into and removed from the kernel while it is running
Text File
Loadable Kernel Modules (LKM)
5 - Multi-user Mode
unlink()

40. Four Phases of the Solaris Boot Process: _______ - Boot Programs - Kernel - and Init
Boot Prom
showmount -e <ip address>
Hardware Interface Modules
df -h

41. Allow the user to share file systems among networked connections
/etc/group
useradd -D
mount -F nfs hostname:directory / <mount point>
Network File System (NFS)

42. 6 Hardware Interface Module Functions: ________ - memory management - interrupt handling - low level device control - disk system management - Process synchronization & IPC
Boot Prom Phase
Binary File
Process scheduling
Interrupt handlers

43. Command used to create a new group
Device Driver
Hard Link - with syntax
useradd -n
groupadd

44. Polls the /etc/inittab file after it has been modified
Process scheduling
telinit -q
max_nprocs
Ext* File System

45. Command used on a Linux system to view the disk's physical partitioning scheme
3 - Multi-User Mode
/etc/nsswitch.conf
fdisk -l
CIFS

46. A file that contains the name of another file - similar to a shortcut; ln -s <targetfile> <linkfile>
5 - Multi-user Mode
Symbolic Link - with syntax
socket()
sh

47. Phase with a sole function of loading the secondary boot program - ufsboot - and executing it
free
Boot Programs Phase
openldap-servers
System Call Interface

48. The main configuration file for Apache
sysctl -a
getty and ttymon
Process scheduling
/etc/apache/httpd.conf

49. Two Forms of Apache: __________ and Source (source code)
User to Kernel Transition Process
5 - Multi-user Mode
Init Phase
Binary (already built/compiled)

50. Command to view your swap partition
df -k
Binary
Text File
Three Types of Signals