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. LDAP package that contains command line tools for viewing/modifying directories on an LDAP server
lo0
openldap-clients
Hardware Layer
Group Descriptor Table

2. Loopback interface in ifconfig
lo0
/proc/sys
modinfo
User Layer

3. Command that displays the amount of free and used memory
free
System call
dmesg
Boot Prom

4. Polls the /etc/inittab file after it has been modified
shareall
usermod
telinit -q
df -v

5. The basic file allocation file unit for Ext* - whose size is defined by the superblock
Data Block
start /sbin/init process
User Layer
5 - Multi-user Mode

6. For Samba - it implements file and print services - as well as authentication and authorization
UNIX "Rings of Protection"
Memory Management Unit (MMU)
strace
smbd

7. Device Name that is used by the system administrator to refer to a particular device by using symbolic links - stored in the /dev directory
Logical Device Name
Shell
/proc/sys
Device Names

8. 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
df -h
df -h
Hardware Layer
UNIX "Rings of Protection"

9. Provides the interface to allow user programs to access kernel functions
Instance Device Name
getty and ttymon
File Timestamps
System call

10. Three Types of System Calls: ____________ - process control - and common controls
SIGQUIT 3
Run-level Field
Library Function
Low level file I/O

11. 6 Hardware Interface Module Functions: ________ - memory management - interrupt handling - low level device control - disk system management - Process synchronization & IPC
newgroup
Process scheduling
System call
Boot Prom

12. Displays default values when adding a new user with no options
/etc/shadow
/etc/group
useradd -D
df -h

13. Four Fields of /etc/inittab: Label Name - __________ - Action - Command
Signals
useradd -D
Hardware Interface Modules
Run-level Field

14. Command that verifies the current run-level
UNIX "Rings of Protection"
Inode Table of Contents
Hardware Layer
who -r

15. In Solaris - the daemon required to use NFS
openldap-clients
/etc/inid/nfs.client
ROOT Account
System Call Interface

16. Command used to print UID and GID
Hardware Address Translation (HAT)
id
Shell
Binary (already built/compiled)

17. Phase where the kernel initializes itself and begins loading modules using ufsboot. Once finished - it unmaps ufsboot
free
File Timestamps
UNIX "Rings of Protection"
Kernel Phase

18. LDAP package that contains the libraries necessary to run the Open LDAP server
Ext*
I/O services
/etc/init.d
openldap

19. Controls the hardware that manages mapping of virtual to physical memory
useradd -m
Memory Management Unit (MMU)
Hardware Address Translation (HAT)
lsmod

20. Programs similar to GINA in Windows that provides the login prompt
dmesg
HOME Vaiable
Boot Prom Phase
getty and ttymon

21. Command to view your swap partition in human readable format
Group Descriptor Table
df -h
sysctl -w
inetd -t

22. In Linux - the command used to see if there is an exported file system running on a machine
mmap()
showmount -e <ip address>
umask
Memory Management Unit (MMU)

23. Device Information Command that displays device config information including hardware - pseudo devices - etc
lsmod
SIGQUIT 3
sysdef
Binary File

24. This Layer consists of user processes that are running - including Shells - UNIX commands - utility programs - and user application programs
User Layer
df
Hardware Layer
Data Block

25. Three File Types: Ordinary - Directory - _______
bash
Shell
Device
Spawned

26. 4 Kernel Layer Functions: Process creation and termination - ________- file/disk access services - terminal handling services
System call
Hardware Interface Modules
max_nprocs
I/O services

27. File that controls how hostnames are resolved system-wide
Text File
/etc/nsswitch.conf
Boot Prom Phase
Memory Management Unit (MMU)

28. Sent by hardware when it needs the processors' attention - caused by an external event
/etc/xinetd.d
Interrupt
df -k
df

29. 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
SIGINT 2
Environment
Kernel Layer
ufsboot

30. Three Types of _________: Physical - Instance - and Logical
Device Names
Apache
/etc/hosts
.profile

31. In Solaris - the command that shares the file systems identified in the /etc/dfs/dfstab file
Network File System (NFS)
shareall
strace
/etc/inid/nfs.client

32. 4 Kernel Layer Functions: Process creation and termination - ________- file/disk access services - terminal handling services
SUID/SGID
/proc/sys
I/O services
SIGINT 2

33. Used by the cd Command when no argument follows
df -k
HOME Vaiable
SIGHUP 1
/etc/xinetd.d

34. Low Level File I/O Calls: creat() - open() - close() - read() - write() - _______ - removes directory entry
unlink()
Block File
/etc/nsswitch.conf
Six Superblock Components

35. O - Running - R - Can be Executed - (S)leeping - (Z)ombie - T - Stopped
usermod
Boot Prom
Process States
/proc/sys

36. Allows you to change a variable in the sysctl.conf
System Call
/etc/services
Interrupt
sysctl -w

37. File that specifies machines to use for name resolution
File System Structures
/etc/resolv.conf
/etc/passwd
5 - Multi-user Mode

38. In Solaris - the software that handles all of the DNS configuration
Boot Prom
truss
Berkeley Internet Name Daemon (BIND)
Superblock

39. Phase with a sole function of loading the secondary boot program - ufsboot - and executing it
Hardware Layer
Boot Programs Phase
Six Superblock Components
df -F ufs -o i

40. Command to view your swap partition in human readable format
df -h
Kernel Layer
Data Block
Device

41. An ASCII text representation of LDAP entries that files used for importing data to an LDAP server must be in
LDAP Data Interchange Format (LDIF)
Berkeley Internet Name Daemon (BIND)
Network File System (NFS)
I/O services

42. When a user process executes a system call and begins executing kernel code
nmbd
Device File
User to Kernel Transition Process
Binary (already built/compiled)

43. Default Run Level for Solaris
lsmod
groupdel
System Call Interface
3 - Multi-User Mode

44. Where master copies of the startup scripts resides
System call
File System Structures
/etc/init.d
Interrupt handlers

45. This Layer consists of user processes that are running - including Shells - UNIX commands - utility programs - and user application programs
User Layer
Instance Device Name
/etc/named.conf
socket()

46. 6 Hardware Interface Module Functions: ________ - memory management - interrupt handling - low level device control - disk system management - Process synchronization & IPC
Process scheduling
truss
Hard Link - with syntax
System call

47. 'K' and 'S' in rc scripts: K is Kill - S is _______
Kernel Layer
Run-level Field
showmount -e <ip address>
Spawned

48. Default Run Level for Linux
5 - Multi-user Mode
Hardware Interface Modules
Apache
.profile

49. This file type contains only data as a stream of characters - also known as a regular file
dmesg
Ordinary File
File Timestamps
df -k

50. Frees up memory when a process runs short of memory

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