154 lines
6.4 KiB
Markdown
154 lines
6.4 KiB
Markdown
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# Questions
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1. What are the differences between hard disk drives and solid state disks? (Choose two.)
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* Hard disks have a motor and moving parts, solid state disks do not.
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* Hard disks can fail due to physical damage, while solid state disks cannot fail.
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* Solid state disks can store many times as much data as hard disk drives.
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* /dev/sdais a hard disk device while /dev/ssda is a solid state disk.
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* Solid state disks provide faster access to stored data than hard disks.
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2. Reverse DNS assigns hostnames to IP addresses. How is the name of the IP address 198.51.100.165 stored on a DNS server?
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* In the A record for 165.100.51.198.ipv4.arpa.
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* In the PTR record for 165.100.51.198.in-addr.arpa.
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* In the RNAME record for 198-51-100-165.rev.arpa.
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* In the ARPA record for 165.100.51.198.rev.
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* In the REV record for arpa.in-addr.198.51.100.165.
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3. Which of the following types of bus can connect hard disk drives with the motherboard?
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* The RAM bus
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* The NUMA bus
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* The CPU bus
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* The SATA bus
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* The Auto bus
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4. Members of a team already have experience using Red Hat Enterprise Linux. For a small hobby project, the team wants to set up a Linux server without paying for a subscription. Which of the following Linux distributions allows the team members to apply as much of their Red Hat Enterprise Linux knowledge as possible?
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* Ubuntu Linux LTS
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* Raspbian
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* Debian GNU/Linux
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* CentOS
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* openSUSE
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5. What information can be displayed by top?
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* Existing files, ordered by their size.
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* Running processes, ordered by CPU or RAM consumption.
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* User accounts, ordered by the number of logins.
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* User groups, ordered by the number of members.
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* User accounts, ordered by the number of files.
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6. Which of the following commands can be used to resolve a DNS name to an IP address?
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* dnsname
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* dns
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* query
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* host
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* iplookup
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7. Which of the following outputs comes from the command free? **TODO**
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* Option A
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* Option B
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* Option C
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* Option D
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* Option E
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8. What is true about the dmesg command? (Choose two.)
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* It traces the execution of a command and shows each step the program carries out.
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* It sends messages to the command lines of all current user sessions.
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* It displays the content of the Linux kernel’s ring buffer.
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* It immediately outputs all new messages written to the system journal.
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* It might not display older information because it was overwritten by newer information.
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9. Which of the following outputs could stem from the command last?
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* `1 ls 2 cat text.txt 3 logout`
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* `Password for user last changed at Sat Mar 31 16:38:57 EST 2018`
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* `Last login: Fri Mar 23 10:56:39 2018 from server.example.com`
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* `EXT4-fs (dm-7): mounted filesystem with ordered data mode. Opts: (null)`
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* `root tty2 Wed May 17 21:11 - 21:11 (00:00)`
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10. What is the UID of the user root?
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* 1
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* -1
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* 255
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* 65536
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* 0
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11. Which permissions are set on a regular file once the permissions have been modified with the command chmod 654 file.txt?
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* `drw-r-xr-`
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* `d―wxr-x-`
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* `Cwxr-x--x`
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* `Crwxrw---x`
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* `-rw-r-xr-`
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12. What is true about the owner of a file?
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* Each file is owned by exactly one user and one group.
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* The owner of a file always has full permissions when accessing the file.
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* The user owning a file must be a member of the file’s group.
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* When a user is deleted, all files owned by the user disappear.
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* The owner of a file cannot be changed once it is assigned to an owner.
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13. Which of the following permissions are set on the /tmp/ directory?
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* `rwxrwxrwt`
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* `------rwX`
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* `rwSrw-rw-`
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* `rwxrwS--`
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* `r-xr-X--t`
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14. Which command adds the new user tux and creates the user’s home directory with default configuration files?
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defaultuser tux
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useradd -m tux
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usercreate tux
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useradd -o default tux
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passwd -a tux
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15. What information is stored in /etc/passwd? (Choose three.)
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* The user’s storage space limit
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* The numerical user ID
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* The username
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* The encrypted password
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* The users default shell
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16. Which of the following tar options handle compression? (Choose two.)
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* `-bz`
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* `-z`
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* `-g`
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* `-j`
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* `-z2`
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17. What keyword is used in a shell script to begin a loop?
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18. Which of the following commands creates an archive file work.tar from the contents of the directory ./work/?
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* `tar --new work.tar ./work/`
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* `tar -cf work.tar ./work/`
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* `tar -create work.tgz -content ./work/`
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* `tar work.tar < ./work/`
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* `tar work > work.tar`
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19. Which of the following keys can be pressed to exit less?
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* l
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* x
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* e
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* q
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* !
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20. The current directory contains the following file: `-rwxr-xr-x 1 root root 859688 Feb 7 08:15 test.sh` Given that the file is a valid shell script, how can this script be executed? (Choose two.)
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* run test.sh
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* ${test.sh}
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* cmd ./test.sh
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* ./test.sh
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* bash test.sh
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21. Which of the following commands sorts the output of the command export-logs?
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* `export-logs < sort`
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* `export-logs > sort`
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* `export-logs & sort`
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* `export-logs | sort`
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* `export-logs <> sort`
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22. A directory contains the following files: `a.txt b.txt c.cxt` What would be the output of the following shell script? **CHECK SCRIPT**
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```
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for file in *.txt
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do;
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echo $file
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done
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```
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* a b
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* c.cav
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* a.txt
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* a. txt b. txt
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23. Which of the following commands will search for the file foo.txt under the directory /home?
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* `search /home Cfile foo.txt`
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* `search /home foo. txt`
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* `find /home C file foo.txt`
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* `find /home Cname foo.txt`
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* `find /home foo.txt`
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24. The current directory contains the following file: `-rw-r―r― 1 root exec 24551 Apr 2 12:36 test.sh` The file contains a valid shell script, but executing this file using ./test.shleads to this error: `bash: ./test.sh: Permission denied`. What should be done in order to successfully execute the script?
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* The file’s extension should be changed from .sh to .bin.
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* The execute bit should be set in the file’s permissions.
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* The user executing the script should be added to the exec group.
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* The SetUID bit should be set in the file’s permissions
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* The script should be run using #!./test. shinstead of ./test.sh.
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25. What is a Linux distribution?
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* The Linux file system as seen from the root account after mounting all file systems.
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* A bundling of the Linux kernel, system utilities and other software.
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* The set of rules which governs the distribution of Linux kernel source code.
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* An operating system based on Linux but incompatible to the regular Linux kernel.
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* A set of changes to Linux which enable Linux to run on another processor architecture.
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