UNIX Question and Answer – Group Management
UNIX MCQ – Multiple Choice Questions for exam, interview, and Entrance Test
1. Which command is used to create a new group in UNIX?
a) groupadd
b) groupcreate
c) groupnew
d) addgroup
Answer: a) groupadd
Explanation: The groupadd command is used to create a new group in UNIX.
2. What is the default location where group information is stored in UNIX?
a) /etc/groups
b) /etc/passwd
c) /etc/group
d) /var/groups
Answer: c) /etc/group
Explanation: The /etc/group file stores group information in UNIX.
3. Which command is used to modify a group in UNIX?
a) groupmodify
b) groupmod
c) modifygroup
d) changegroup
Answer: b) groupmod
Explanation: The groupmod command is used to modify a group in UNIX.
4. What option is used with the groupadd command to specify the GID (Group ID) of the new group?
a) -g
b) -i
c) -n
d) -d
Answer: a) -g
Explanation: The -g option with groupadd specifies the GID of the new group in UNIX.
5. Which command is used to delete a group in UNIX?
a) groupdelete
b) groupremove
c) groupdel
d) delgroup
Answer: c) groupdel
Explanation: The groupdel command is used to delete a group in UNIX.
6. What is the purpose of the -r option with the groupdel command?
a) Remove all users from the group before deleting
b) Remove the group’s directory
c) Remove the group from the system
d) Remove group-related files
Answer: b) Remove the group’s directory
Explanation: The -r option with groupdel removes the group’s directory along with the group.
7. Which command is used to display information about groups a user belongs to?
a) groups
b) usergroups
c) groupinfo
d) userinfo
Answer: a) groups
Explanation: The groups command displays information about groups a user belongs to in UNIX.
8. What command is used to change the name of a group in UNIX?
a) changegroup
b) groupchange
c) groupmod
d) renamegroup
Answer: c) groupmod
Explanation: The groupmod command is used to change the name of a group in UNIX.
9. Which command is used to list all groups in UNIX?
a) listgroups
b) showgroups
c) getgroups
d) getent group
Answer: d) getent group
Explanation: The getent group command lists all groups in UNIX.
10. What is the purpose of the -K option with the groupadd command?
a) Set group password
b) Create a group with a specific password
c) Set the maximum number of members for the group
d) Set the expiration date for the group
Answer: a) Set group password
Explanation: The -K option with groupadd is used to set a group password in UNIX.
11. Which command is used to change the primary group of a user in UNIX?
a) usermod
b) changegroup
c) primarygroup
d) setgroup
Answer: a) usermod
Explanation: The usermod command is used to change the primary group of a user in UNIX.
12. What is the purpose of the -n option with the groupmod command?
a) Change the group name
b) Change the group ID
c) Change the group owner
d) Change the group description
Answer: a) Change the group name
Explanation: The -n option with groupmod is used to change the name of a group in UNIX.
13. Which command is used to display detailed information about a specific group in UNIX?
a) showgroup
b) getgroup
c) groupinfo
d) getent group
Answer: d) getent group
Explanation: The getent group command displays detailed information about a specific group in UNIX.
14. What is the purpose of the -o option with the groupadd command?
a) Allow the use of non-unique GIDs
b) Set the group owner
c) Set the group description
d) Add users to the group
Answer: a) Allow the use of non-unique GIDs
Explanation: The -o option with groupadd allows the use of non-unique GIDs in UNIX.
15. Which command is used to add an existing user to an existing group in UNIX?
a) useradd
b) adduser
c) usermod
d) usergrp
Answer: c) usermod
Explanation: The usermod command is used to add an existing user to an existing group in UNIX.
16. What is the purpose of the -p option with the groupmod command?
a) Change the group password
b) Change the group ID
c) Change the group owner
d) Change the group description
Answer: a) Change the group password
Explanation: The -p option with groupmod is used to change the password of a group in UNIX.
17. Which command is used to change the password of a group in UNIX?
a) chgrp
b) passwd
c) setgroup
d) changegroup
Answer: b) passwd
Explanation: The passwd command is used to change the password of a group in UNIX.
18. What is the purpose of the -P option with the groupmod command?
a) Set the group password
b) Set the expiration date for the group
c) Set the maximum number of members for the group
d) Set the group owner
Answer: b) Set the expiration date for the group
Explanation: The -P option with groupmod is used to set the expiration date for the group in UNIX.
19. Which command is used to display the members of a specific group in UNIX?
a) showgroup
b) getgroup
c) members
d) getent group
Answer: d) getent group
Explanation: The getent group command displays the members of a specific group in UNIX.
20. What is the purpose of the -R option with the groupadd command?
a) Set the group owner
b) Set the group password
c) Set the default group
d) Set the group ID range
Answer: d) Set the group ID range
Explanation: The -R option with groupadd is used to set the group ID range in UNIX.
21. Which command is used to remove a user from a group in UNIX?
a) userdel
b) deluser
c) usermod
d) usergrp
Answer: c) usermod
Explanation: The usermod command is used to remove a user from a group in UNIX.
22. What is the purpose of the -r option with the groupadd command?
a) Set the group owner
b) Remove the group’s directory
c) Set the default group
d) Set the group ID range
Answer: b) Remove the group’s directory
Explanation: The -r option with groupadd removes the group’s directory along with the group in UNIX.
23. Which command is used to change the group owner of a file in UNIX?
a) chown
b) chgrp
c) setgroup
d) changegroup
Answer: b) chgrp
Explanation: The chgrp command is used to change the group owner of a file in UNIX.
24. What is the purpose of the -E option with the groupmod command?
a) Set the expiration date for the group
b) Set the maximum number of members for the group
c) Change the group description
d) Change the group owner
Answer: c) Change the group description
Explanation: The -E option with groupmod is used to change the description of a group in UNIX.
25. Which command is used to list all users belonging to a specific group in UNIX?
a) listgroup
b) showgroup
c) getent group
d) getent passwd
Answer: c) getent group
Explanation: The getent group command lists all users belonging to a specific group in UNIX.
26. Which command is used to display the primary group of a user in UNIX?
a) id
b) primarygroup
c) usergroup
d) showgroup
Answer: a) id
Explanation: The id command is used to display user and group information, including the primary group, in UNIX.
27. What is the purpose of the -o option with the groupmod command?
a) Change the group password
b) Allow non-unique GIDs
c) Change the group owner
d) Set the expiration date for the group
Answer: b) Allow non-unique GIDs
Explanation: The -o option with groupmod allows non-unique GIDs (Group IDs) in UNIX.
28. Which command is used to list all groups a user is a member of in UNIX?
a) showgroups
b) listgroups
c) usergroups
d) groups
Answer: d) groups
Explanation: The groups command lists all groups a user is a member of in UNIX.
29. What is the purpose of the -K option with the groupmod command?
a) Change the group password
b) Set the maximum number of members for the group
c) Set the expiration date for the group
d) Set the default group
Answer: b) Set the maximum number of members for the group
Explanation: The -K option with groupmod sets the maximum number of members for the group in UNIX.
30. Which command is used to display the group ID (GID) of a specific group in UNIX?
a) id
b) getent group
c) showgroup
d) groupid
Answer: b) getent group
Explanation: The getent group command displays the group ID (GID) of a specific group in UNIX.
31. What is the purpose of the -p option with the groupdel command?
a) Remove the group’s directory
b) Prompt for confirmation before deletion
c) Remove all users from the group before deletion
d) Remove the group password
Answer: d) Remove the group password
Explanation: The -p option with groupdel removes the group password in UNIX.
32. Which command is used to change the group owner of a directory and its contents recursively in UNIX?
a) chown
b) chgrp
c) setgroup
d) changegroup
Answer: a) chown
Explanation: The chown command is used to change the group owner of a directory and its contents recursively in UNIX.
33. What is the purpose of the -n option with the groupdel command?
a) Remove the group’s directory
b) Prompt for confirmation before deletion
c) Remove the group from the system
d) Change the group name
Answer: d) Change the group name
Explanation: The -n option with groupdel changes the group name before deletion in UNIX.
34. Which command is used to change the group ID (GID) of a group in UNIX?
a) changegid
b) setgid
c) groupmod
d) modifygid
Answer: c) groupmod
Explanation: The groupmod command is used to change the group ID (GID) of a group in UNIX.
35. What is the purpose of the -g option with the groupmod command?
a) Change the group name
b) Change the group ID
c) Change the group owner
d) Add users to the group
Answer: b) Change the group ID
Explanation: The -g option with groupmod changes the group ID (GID) of a group in UNIX.
36. Which command is used to list all users on the system along with their primary group in UNIX?
a) getent passwd
b) listusers
c) showusers
d) getent group
Answer: a) getent passwd
Explanation: The getent passwd command lists all users on the system along with their primary group in UNIX.
37. What is the purpose of the -i option with the groupmod command?
a) Change the group ID
b) Set the expiration date for the group
c) Set the maximum number of members for the group
d) Prompt for confirmation before modification
Answer: d) Prompt for confirmation before modification
Explanation: The -i option with groupmod prompts for confirmation before modifying a group in UNIX.
38. Which command is used to change the group membership of a user in UNIX?
a) setgroup
b) changegroup
c) usermod
d) addgroup
Answer: c) usermod
Explanation: The usermod command is used to change the group membership of a user in UNIX.
39. What is the purpose of the -R option with the groupdel command?
a) Remove the group’s directory
b) Prompt for confirmation before deletion
c) Remove the group from the system
d) Remove all users from the group before deletion
Answer: a) Remove the group’s directory
Explanation: The -R option with groupdel removes the group’s directory along with the group in UNIX.
40. Which command is used to change the group password in UNIX?
a) passwd
b) chgrp
c) groupmod
d) setgroup
Answer: a) passwd
Explanation: The passwd command is used to change the group password in UNIX.
41. What is the purpose of the -M option with the groupmod command?
a) Change the group name
b) Set the maximum number of members for the group
c) Set the group password
d) Add or remove users from the group
Answer: d) Add or remove users from the group
Explanation: The -M option with groupmod is used to add or remove users from the group in UNIX.
42. Which command is used to display the group owner of a file in UNIX?
a) ls
b) getent group
c) showgroup
d) stat
Answer: d) stat
Explanation: The stat command is used to display the group owner of a file in UNIX.
43. What is the purpose of the -f option with the groupmod command?
a) Set the group password
b) Set the expiration date for the group
c) Set the maximum number of members for the group
d) Forcefully modify the group
Answer: d) Forcefully modify the group
Explanation: The -f option with groupmod forcefully modifies the group in UNIX.
44. Which command is used to change the group owner of a symbolic link in UNIX?
a) chown
b) chgrp
c) changegroup
d) setgroup
Answer: b) chgrp
Explanation: The chgrp command is used to change the group owner of a symbolic link in UNIX.
45. What is the purpose of the -l option with the groupmod command?
a) Set the group ID
b) Set the expiration date for the group
c) Change the group name
d) Change the group description
Answer: d) Change the group description
Explanation: The -l option with groupmod is used to change the group description in UNIX.
46. Which command is used to list all members of a specific group in UNIX?
a) listmembers
b) getent group
c) showmembers
d) members
Answer: b) getent group
Explanation: The getent group command lists all members of a specific group in UNIX.
47. What is the purpose of the -N option with the groupadd command?
a) Set the group password
b) Set the expiration date for the group
c) Set the maximum number of members for the group
d) Prevent the creation of a group with the same name as an existing user
Answer: d) Prevent the creation of a group with the same name as an existing user
Explanation: The -N option with groupadd prevents the creation of a group with the same name as an existing user in UNIX.
48. Which command is used to change the primary group of a file in UNIX?
a) chown
b) chgrp
c) setgroup
d) changegroup
Answer: a) chown
Explanation: The chown command is used to change the primary group of a file in UNIX.
49. What is the purpose of the -n option with the groupmod command?
a) Change the group ID
b) Set the expiration date for the group
c) Change the group name
d) Change the group owner
Answer: c) Change the group name
Explanation: The -n option with groupmod changes the name of a group in UNIX.
50. Which command is used to change the group membership of multiple users in UNIX?
a) usermod
b) chgroup
c) setgroup
d) modifygroup
Answer: a) usermod
Explanation: The usermod command is used to change the group membership of multiple users in UNIX.
