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Q9. - (Topic 6)
Which of the following commands can be used to script interactions with various TCP or UDP services?
A. ftp
B. nc
C. tcpdump
D. strings
E. wget
Answer: B
Q10. - (Topic 4)
Due to extreme system use, a Linux system requires some additional swap space. To initialize 5GB of additional swap space, which combination of commands should be used?
A. dd if=/dev/zero of=/tmp/swapfile bs=1024 count=5120000; mkswap /tmp/swapfile; mount /tmp/swapfile
B. dd if=/dev/zero of=/tmp/swapfile bs=1024 count=5120000; swapon /tmp/swapfile
C. dd if=/dev/zero of=/tmp/swapfile bs=1024 count=5120000; mkswap /tmp/swapfile; swapon /tmp/swapfile
D. touch -5G /tmp/swapfile; swapon /tmp/swapfile
E. mkswap /tmp/swapfile 512000; swapon /tmp/swapfile
Answer: C
Q11. - (Topic 7)
Which one of these directories should not be backed up?
A. /backup
B. /etc
C. /opt
D. /proc
E. /var/log
Answer: D
Q12. - (Topic 3)
A Linux server is running in single user mode for regular maintenance. Which commands are used to restore the server to its usual runlevel? (Choose TWO correct answers.)
A. telinit 0
B. shutdown -r now
C. sync
D. shutdown -h now
E. reboot
Answer: B,E
Q13. - (Topic 3)
Where is the LILO boot loader code typically installed on a system with only a single Linux installation and no other operating systems?
A. In the master boot record.
B. In the boot sector.
C. In the /boot directory.
D. At the start of the kernel.
Answer: A
Q14. - (Topic 6)
Which of the following commands can be used to list IPv4 addresses and MAC addresses for IP devices that the system has seen on the local network?
A. arp
B. ifconfig
C. ipadm
D. iwlist
Answer: A
Q15. - (Topic 8)
When you back up only the files that have changed since the last backup, this is called a ____ backup.
A. Partial
B. Differential
C. Full
D. Copy
Answer: B
Explanation: When you run a full backup, the files are marked as having been backed up (the archive attribute is cleared). When a file is created or changed, it is marked as ‘not backed up’ (the archive attribute is set). A differential backup backs up any files created or changed since the last full backup (the files marked as ‘not backed up’). It does not mark files as having been backed up (in other words, the archive attribute is not cleared).
Reference: http://www.raid-unix-mac-disk-datarecovery- service.com/diferential_backup.htm
Incorrect Answers
A:A partial backup is not an actual backup type. It is just a description of backing up a few selected files.
C:A full backup backs up all files and marks them as having been backed up by clearing the archive attribute.
D:A copy backup backs up all files but does not mark them as having been backed up.
Q16. - (Topic 7)
Which of the following commands will securely copy the directory ./fyf/ to /var/tmp/ on the remote host deltaur using the remote user account kevin?
A. rsync -a -e ssh kevin@deltaur:/var/tmp/ fyf/
B. rsync -a -u kevin -e ssh fyf/ deltaur:/var/tmp/
C. rsync -a -u kevin -e ssh deltaur:/var/tmp/ fyf/
D. rsync -a -e ssh fyf/ kevin@deltaur:/var/tmp/
Answer: D