- (Exam Topic 3)
When running the command
sed -e "s/a/b/" /tmp/file >/tmp/file
While /tmp/file contains data, why is /tmp/file empty afterwards?

1. A. The file order is incorrec
2. B. The destination file must be mentioned before the command to ensure redirection.
3. C. The command sed did not match anything in that file therefore the output is empty.
4. D. When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens itfor reading.
5. E. Redirection for shell commands do not work using the > characte
6. F. It only works using the | character instead.

Correct Answer: C

- (Exam Topic 2)
Which of the following commands overwrites the bootloader located on /dev/sda without overwriting the partition table or any data following it?

1. A. dd if=/dev/zero of=/dev/sda bs=512
2. B. dd if=/dev/zero of=/dev/sda bs=512 count=1
3. C. dd if=/dev/zero of=/dev/sda bs=440 count=1
4. D. dd if=/dev/zero of=/dev/sda bs=440

Correct Answer: C

- (Exam Topic 4)
Which of the following statements describes a difference between GNU GRUB Legacy and GRUB 2?

1. A. GRUB 2 no longer requires a configuration file.
2. B. Partition numbers start at 0 in GRUB Legacy and1in GRUB 2.
3. C. grub-mkconfigonly works with GRUB Legacy if the--version 1option is used.
4. D. The configuration filemenu.lst(andgrub.conf) have been replaced withgrub.config.

Correct Answer: B

- (Exam Topic 5)
What does the command mount --bind do?

1. A. It makes the contents of one directory available in another directory
2. B. It mounts all available filesystems to the current directory
3. C. It mounts all user mountable filesystems to the user’s home directory
4. D. It mounts all file systems listed in /etc/fstab which have the option userbind set
5. E. It permanently mounts a regular file to a directory

Correct Answer: A

- (Exam Topic 5)
When considering the use of hard links, what are valid reasons not to use hard links?

1. A. Hard links are not available on all Linux systems because traditional filesystems, such as ext4, do not support them
2. B. Each hard link has individual ownership, permissions and ACLs which can lead to unintended disclosure of file content
3. C. Hard links are specific to one filesystem and cannot point to files on another filesystem
4. D. If users other than root should be able to create hard links, suln has to be installed and configured
5. E. When a hard linked file is changed, a copy of the file is created and consumes additional space

Correct Answer: A