1. C
Print the full path of the current directory shows where the user is located in the filesystem.

2. A
Modify the permissions of a file or directory controls read, write, and execute access.

3. B
Scan the contents of files for a particular text searches for specific patterns.

4. C
Show all running processes dynamically with resource usage provides a live overview of system processes.

5. B
Execute commands with administrative privileges allows tasks requiring elevated permissions.

6. A
The password and account details file located at etc passwd stores all user account information.

7. B
Show the file contents page by page prevents overwhelming the terminal with too much data.

8. A
Show the available and used disk space on all mounted filesystems provides disk usage details.

9. D
All of the above commands can compress files, each using different methods.

10. C
List all files including those that are hidden ensures hidden files starting with a dot are visible.

11. B
Display the end portion of a file with recent entries shows the last ten lines by default.

12. A
Schedule recurring tasks to run automatically uses crontab for automated jobs.

13. A
Modify the owner and group of a file changes ownership for management and access control.

14. A
It terminates a running process using its process identifier stops unwanted processes.

15. B
Show the beginning portion of a file containing the first twenty lines displays the file header.

16. A
Display the version of the operating system kernel provides the kernel release information.

17. A
Attach a filesystem to a specific location in the directory tree allows access to storage devices.

18. A
Show detailed network interface information displays IP addresses and configuration.

19. A
Create a shortcut reference to another file or directory enables easy access without duplicating files.

20. B
Show total and available memory along with swap usage provides complete memory statistics.

21. A
Search the filesystem for a file matching the specified name finds the file starting from root.

22. A
Archive and extract multiple files into a single file allows efficient storage and transfer.

23. A
The group configuration file located at etc group stores all group information.

24. A
Set the owner to have read, write, and execute permissions and others to have only read access enforces access control.

25. A
Show the most recent login time for each user account helps track user activity.

26. B
Show a real-time dynamic list of processes and system resource consumption monitors system performance.

27. D
All of the above commands display environmental variables in different formats.

28. C
Recursively remove the directory and all its contents ensures the directory and files are deleted.

29. A
Report the amount of space used by files and subdirectories provides usage statistics.

30. A
Show the beginning portion of the file limited to fifty bytes allows byte-level inspection.

31. A
Verify network connectivity to another host by sending test packets tests network reachability.

32. A
Change the current user session to a different account allows temporary switching between users.

33. B
Continuously display new log entries as they are added monitors system events in real-time.

34. A
Show previously executed commands in the terminal session provides a command history.

35. A
Show a detailed list of active network connections and listening ports displays all connections.

36. C
List comprehensive hardware information for the system provides detailed resource and device information.