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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. Device Information Command that displays system config info including total memory and device configuration
prtconf
Binary
free
User to Kernel Transition Process
2. located 1024 bytes from the start of the file system and is 1024 bytes in size
Block File
Apache Error Log
/etc/xinetd.d
Superblock
3. Phase where the kernel initializes itself and begins loading modules using ufsboot. Once finished - it unmaps ufsboot
telinit -q
SIGQUIT 3
'#'
Kernel Phase
4. Total number of inodes and blocks - block size - number of blocks/inodes per group and number or reserved blocks before the first block group
Six Superblock Components
Boot Prom Phase
strace
LDAP Data Interchange Format (LDIF)
5. Ordinary file that contains both printable and non-printable characters - ex - most UNIX executables
df -F ufs -o i
Memory Management Unit (MMU)
Binary File
getty and ttymon
6. Used to describe the layout of block groups
Shell
System Call Interface
Group Descriptor Table
df -h
7. Command that displays the amount of free and used memory
free
init and telinit
3 - Multi-User Mode
Memory Management Unit (MMU)
8. Three Steps of Kernel Phase: Create a user process - __________ - and starts other processes by reading /etc/inittab
Ext* File System
telinit -q
Kernel Layer
start /sbin/init process
9. Character used to stop a service from starting during boot up
SIGKILL 9
sysctl -a
Trap
Run-level Field
Boot Programs Phase
Hardware Address Translation (HAT)
ufsboot
Physical Device Name
File Timestamps
id
User Layer
Character File
df -h
Inode Table of Contents
socket()
before /etc/profile
Hardware Interface Modules
start /sbin/init process
Logical Device Name
Low level file I/O
truss
pwconv
SIGHUP 1
sched PID of '0' -
Restricted Shell
Data Block
.profile
who -r
sysctl
Library Function
lsmod
Environment
Device
sysctl -w
/etc/inetd.conf
Directory File
start /sbin/init process
Symbolic Link - with syntax
Process States
free
share -F nfs /<path>
Shell
touch -m/-a
openldap-servers
Inode
useradd -m
'#'
df -h
SIGINT 2
Kernel Layer
sh
mmap()
User Layer
User to Kernel Transition Process
Samba
Device File
shareall
Interrupt handlers
Text File
Information Commands
openldap-clients
kill (sig -pid)
df -k
df
Loadable Kernel Modules (LKM)
Apache Document Root
df -h
Ext*
5 - Multi-user Mode
Apache
3 - Multi-User Mode
sysctl -p
Init Phase
SIGQUIT 3
Binary
init and telinit
/etc/passwd
Boot Prom Phase
Kernel Phase
/etc/xinetd.d
Hardware Layer
/etc/shadow
/usr/sbin/slurpd
df -k
Boot-up
Ext* File System
Network Information Service Plus (NIS+)
umask
telinit -q
UNIX "Rings of Protection"
Kernel
Device Names
getty and ttymon
CIFS
Three Types of Signals
usermod
File System Structures
df -v
nmbd
Kernel Phase
Instance Device Name
df -v
showmount -e <ip address>
Boot Prom
SIGTERM 15
who -r
Process scheduling
Boot Prom
/etc/resolv.conf
bash
Interrupt
Signals
useradd -n
PATH=$PATH:/xxx/xxx/bin
ps -elf
groupdel
3 - Multi-User Mode
telinit -q
strace
/etc/inid/nfs.client
fdisk -l
File System
I/O services
/etc/named.conf
Block File
5 - Multi-user Mode
Hardware Address Translation (HAT)
ROOT Account
init and telinit
SUID/SGID
/sbin/service
modinfo
df -F ufs -o i
Directory Entry
max_nprocs
/etc/services
Spawned
Kernel
Ordinary File
Kernel Layer
/etc/apache/httpd.conf
getty and ttymon
/proc/sys
df -k
System Call Interface
Hard Link - with syntax
Apache Server Root
Six Superblock Components
Interrupt handlers
System call
Group Descriptor Table
UNIX "Rings of Protection"
Device File
Memory Management Unit (MMU)
sysdef
Lightweight Directory Access Protocol (LDAP)
/etc/xinetd.d
Init Phase
Apache Error Log
unlink()
Superblock
Process scheduling
free
Shell
Boot Prom Phase
Binary File
Hardware Layer
User to Kernel Transition Process
sysdef
newgroup
Boot Programs Phase
Apache Directory Structure
inetd.d
ufsboot
inetd -t
prtconf
/etc/hosts
uname()
/etc/group
/etc/nsswitch.conf
mount -F nfs hostname:directory / <mount point>
/etc/init.d
Network File System (NFS)
I/O services
HOME Vaiable
Schema
Hardware Interface Modules
df
lo0
openldap
'#'
df -F ufs -o i
rpcinfo -p
showmount -e <ip address>
System call
useradd -D
/etc/passwd
smbd
Memory Management Unit (MMU)
groupadd
Run-level Field
System Call Interface
Device Driver
LDAP Data Interchange Format (LDIF)
System Call
dmesg
Berkeley Internet Name Daemon (BIND)
Binary (already built/compiled)
10. In Solaris - the command that shares the file systems identified in the /etc/dfs/dfstab file
df -v
shareall
File System
Apache Error Log
11. File where group memberships are established - inluding group names - encrypted password - GID - and users in each group
/etc/group
Logical Device Name
df
Hardware Interface Modules
12. These are found within the kernel layer at the level closest to the hardware
Hardware Interface Modules
/etc/init.d
/etc/group
pwconv
13. Three Unique _________ Characteristics: Cannot be renamed/deleted - has a user ID of 0 - and has a prompt of '#'
ROOT Account
User to Kernel Transition Process
prtconf
Kernel Phase
14. 4 Kernel Layer Functions: Process creation and termination - ________- file/disk access services - terminal handling services
I/O services
Boot Prom
3 - Multi-User Mode
openldap
15. A low level program that allows the kernel to communicate with the specific piece of hardware
/etc/passwd
Apache Server Root
Device Driver
/usr/sbin/slurpd
16. Controls the hardware that manages mapping of virtual to physical memory
smbd
Hardware Address Translation (HAT)
Ext*
Run-level Field
17. Converts a process running in user mode to a protected kernel mode process
id
System Call Interface
File Timestamps
nmbd
18. Hangup - restarts a daemon
modinfo
SIGHUP 1
UNIX "Rings of Protection"
kill (sig -pid)
19. This file type contains only data as a stream of characters - also known as a regular file
Ordinary File
pwconv
Hardware Layer
Boot Prom
20. A simple data structure that contains the file name and the inode address where the file's metadata can be found - also contains a pointer to the next entry
Lightweight Directory Access Protocol (LDAP)
Directory Entry
UNIX "Rings of Protection"
mount -F nfs hostname:directory / <mount point>
21. The core of the operating system that is loaded into memory at system boot; it manages the hardware and performs system services
Hardware Interface Modules
Kernel
Environment
Device File
22. Command that allows files to be "memory mapped" by application programs
Network Information Service Plus (NIS+)
Library Function
mmap()
System call
23. Command used to print UID and GID
usermod
/etc/inetd.conf
id
Samba
24. The basic file allocation file unit for Ext* - whose size is defined by the superblock
Boot Prom
Berkeley Internet Name Daemon (BIND)
Data Block
Network File System (NFS)
25. Returns system information pertaining to the platform
/etc/init.d
Superblock
inetd -t
uname()
26. System Calls: fork() - creates a child process - wait() - exit() - __________ - execl() - execlp() - execv() - execvp()
openldap-clients
System Call Interface
kill (sig -pid)
Hardware Address Translation (HAT)
27. Daemon that lists port/service mappings
/etc/services
shareall
Data Block
Lightweight Directory Access Protocol (LDAP)
28. LDAP package that contains command line tools for viewing/modifying directories on an LDAP server
UNIX "Rings of Protection"
Character File
start /sbin/init process
openldap-clients
29. Phase where the kernel initializes itself and begins loading modules using ufsboot. Once finished - it unmaps ufsboot
System call
SIGINT 2
Kernel Phase
Shell
30. Command used to view system calls accessed during the execution of a command on Solaris systems
fdisk -l
truss
uname()
Apache Error Log
31. Command in Linux that shows the status of loadable kernel modules that are currently loaded
free
who -r
ufsboot
lsmod
32. Device Information Command that displays device config information including hardware - pseudo devices - etc
sysdef
share -F nfs /<path>
mmap()
/etc/passwd
33. Most commonly used file system based on Unix File System
groupdel
id
5 - Multi-user Mode
Ext* File System
34. Command to view your swap partition in human readable format
Kernel Phase
strace
df -h
showmount -e <ip address>
35. Default Run Level for Linux
Symbolic Link - with syntax
5 - Multi-user Mode
Superblock
ufsboot
36. File type also known as a folder - it contains other files and directories but will not contain actual data
getty and ttymon
Init Phase
Three Types of Signals
Directory File
37. This Layer consists of user processes that are running - including Shells - UNIX commands - utility programs - and user application programs
Directory Entry
Trap
max_nprocs
User Layer
38. Quit from terminal
Directory Entry
SIGQUIT 3
Kernel
getty and ttymon
39. init loads from /sbin/init - reads the /etc/inittab file and executes the listed run-control scripts located in /sbin/rd*.d
Init Phase
Boot-up
User to Kernel Transition Process
socket()
40. Controls the hardware that manages mapping of virtual to physical memory
pwconv
Hardware Address Translation (HAT)
modinfo
kill (sig -pid)
41. Default termination signal
Memory Management Unit (MMU)
SIGTERM 15
Boot Programs Phase
sysctl -p
42. Extra permission bit that allows anyone to run a program with the same privileges as its owner or group - denoted by *
rpcinfo -p
SUID/SGID
Hardware Address Translation (HAT)
Information Commands
43. Three Files Associated with Each User: _________ - /etc/shadow - and /etc/group
/etc/passwd
5 - Multi-user Mode
fdisk -l
Device
44. Command used to switch to a new group before creating a file that would be used by a different current group - similar to 'su'
who -r
Directory Entry
Superblock
newgroup
45. Three Types of _________: Physical - Instance - and Logical
newgroup
pwconv
Network File System (NFS)
Device Names
46. The web server widely used in the public domain that was based off of a UNIX Web server
Apache
sysctl -p
Device File
System Call
47. Allows you to change a variable in the sysctl.conf
/etc/inid/nfs.client
sysctl -w
Apache
inetd.d
48. Makes a socket normally for a TCP (two way) stream
socket()
/etc/services
init and telinit
/etc/nsswitch.conf
49. Displays process list with attributes
Superblock
/etc/services
Directory File
ps -elf
50. For Samba - it implements file and print services - as well as authentication and authorization
Boot Prom Phase
Text File
smbd
sysdef