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Test your basic knowledge |
Unix Operating System
Start Test
Study First
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
/etc/inetd.conf
UNIX "Rings of Protection"
Information Commands
df -F ufs -o i
2. Gives UNIX/Linux users the ability to access shared resources on Windows machines by implementing CIFS
Block File
SIGHUP 1
Hardware Layer
Samba
3. Virtual directory that provides an interface to sysctl parameters - allowing you to examine and change them
Hardware Interface Modules
Hardware Address Translation (HAT)
/proc/sys
Ext* File System
4. Where master copies of the startup scripts resides
HOME Vaiable
/etc/init.d
SIGINT 2
groupadd
5. Command will show your used and free inodes
File System
df -F ufs -o i
Run-level Field
lsmod
6. Command in Solaris that lists the modules that are currently loaded
who -r
modinfo
I/O services
Text File
7. Presents each user with a prompt - executes user commands - and supports a custom environment for each user
telinit -q
openldap-clients
Shell
sysctl -p
8. These are found within the kernel layer at the level closest to the hardware
'#'
Hardware Interface Modules
Hardware Address Translation (HAT)
Network Information Service Plus (NIS+)
9. Types Two ___________: Block and Character
df -h
Device File
SIGQUIT 3
Memory Management Unit (MMU)
10. For Samba - it provides name resolution and service announcement
HOME Vaiable
System Call
nmbd
df -v
11. Secondary boot program that locates and load the basic kernel
ufsboot
pwconv
start /sbin/init process
File Timestamps
12. Two Ordinary File Types: Text and ______
User Layer
Boot Prom Phase
Binary File
Binary
13. Polls the /etc/inittab file after it has been modified
3 - Multi-User Mode
inetd.d
telinit -q
Boot Programs Phase
14. In Solaris - the daemon required to use NFS
ROOT Account
5 - Multi-user Mode
df -k
/etc/inid/nfs.client
15. File where group memberships are established - inluding group names - encrypted password - GID - and users in each group
mmap()
/etc/group
'#'
Hardware Address Translation (HAT)
16. Returns system information pertaining to the platform
/etc/passwd
I/O services
uname()
df -v
17. Four Fields of /etc/inittab: Label Name - __________ - Action - Command
SIGINT 2
Run-level Field
sched PID of '0' -
File Timestamps
18. Daemon that is used for viewing network services in Linux - has more customization than the Solaris counterpart
df
CIFS
/etc/xinetd.d
Process States
19. Command in Linux that provides an interface to allow you to examine and change parameters in /proc/sys
Device
dmesg
sysctl
Apache Error Log
20. Similar to DLLs in Windows that can be built upon and around system calls
Apache Server Root
Library Function
Process States
SIGKILL 9
21. Converts a process running in user mode to a protected kernel mode process
SIGQUIT 3
df -v
System Call Interface
sysctl -a
22. Two Types of _______________: Root (AKA Boot) and Swap
Memory Management Unit (MMU)
strace
/etc/apache/httpd.conf
File System Structures
23. This Layer includes hardware such as CPU - system memory - the terminal - disks - CD-ROM - and NIC
Loadable Kernel Modules (LKM)
sched PID of '0' -
System call
Hardware Layer
24. Ordinary file that contains only printable characters
Text File
getty and ttymon
/etc/init.d
Kernel Phase
25. Allow the user to share file systems among networked connections
/etc/xinetd.d
Network File System (NFS)
3 - Multi-User Mode
/etc/passwd
26. Command used to view system calls accessed during the execution of a command on Linux systems
mount -F nfs hostname:directory / <mount point>
strace
Process scheduling
Lightweight Directory Access Protocol (LDAP)
27. Command to view your swap partition
Hardware Interface Modules
showmount -e <ip address>
df -k
free
28. Four Ext* _________: Modify - Access - Change - Delete
openldap-clients
/etc/init.d
df -h
File Timestamps
29. Two Basic Components of ___: Superblock data structure and Group Descriptor Table
System call
Logical Device Name
Network Information Service Plus (NIS+)
Ext*
30. Three Steps of Kernel Phase: Create a user process - __________ - and starts other processes by reading /etc/inittab
/etc/inid/nfs.client
'#'
start /sbin/init process
3 - Multi-User Mode
31. Two Ways to Stop Services in Linux: Editing the _______ service file - and using the chkconfig command
Directory File
dmesg
/etc/xinetd.d
User Layer
32. The way used in LDAP to describe the format and attributes of data in the server
Schema
Run-level Field
/etc/passwd
touch -m/-a
33. Command in Linux that shows the status of loadable kernel modules that are currently loaded
sysdef
lsmod
df
getty and ttymon
34. File type also known as a folder - it contains other files and directories but will not contain actual data
SIGHUP 1
/etc/nsswitch.conf
Boot Prom Phase
Directory File
35. 4 Kernel Layer Functions: Process creation and termination - ________- file/disk access services - terminal handling services
I/O services
Device
System Call Interface
umask
36. The basic file allocation file unit for Ext* - whose size is defined by the superblock
socket()
Boot Prom
Hardware Layer
Data Block
37. Command that displays the amount of free and used memory
Text File
touch -m/-a
modinfo
free
38. Command that allows files to be "memory mapped" by application programs
I/O services
df -k
mmap()
/etc/nsswitch.conf
39. Phase where the kernel initializes itself and begins loading modules using ufsboot. Once finished - it unmaps ufsboot
System call
Kernel Phase
/etc/passwd
Device File
40. Sent by hardware when it needs the processors' attention - caused by an external event
Symbolic Link - with syntax
Interrupt
openldap
Inode
41. Commands that reveals all *nix file systems - including disk space usage and their logical mount points
System call
showmount -e <ip address>
/etc/named.conf
df -k
42. init loads from /sbin/init - reads the /etc/inittab file and executes the listed run-control scripts located in /sbin/rd*.d
Init Phase
System call
ufsboot
LDAP Data Interchange Format (LDIF)
43. Two Types of Variables: Local and ________
Interrupt handlers
Environment
/etc/apache/httpd.conf
Trap
44. Can be configured to restrict the activities of users by modifying the last entry in the /etc/passwd
useradd -m
Restricted Shell
start /sbin/init process
groupadd
45. In Solaris - the command that shows a machine with an exported file system
Low level file I/O
Device Names
df -h
showmount -e <ip address>
46. Quit from terminal
SIGINT 2
/proc/sys
SIGQUIT 3
Kernel Layer
47. Terminal (CTRL+C) - Administrator ("kill") - Kernel (divide by zero)
Init Phase
Three Types of Signals
Signals
kill (sig -pid)
48. Command that verifies the current run-level
who -r
newgroup
lsmod
Apache
49. Device Information Command that displays system diagnostic messages and a list of attached devices
Hardware Layer
pwconv
User Layer
dmesg
50. When a user process executes a system call and begins executing kernel code
User to Kernel Transition Process
who -r
System Call Interface
Signals