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COPA Practice Test: DOS & LINUX Operating Systems
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COPA Practice Test: DOS & LINUX Operating Systems
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25 Questions

1. How the directories under the root directory are called?
2. Which DOS command is used to list all com files in D drive?
3. Which command is used to release the read only permission?
4. Which command is used to release the read only permission?
5. Which character is used to redirect output in to an existing file in Linux?
6. Which Linux command list the contents of parent directory?
7. Which DOS command is used to display system time?
8. Which one of the following is the wildcard character?
9. Write the Linux command to remove all the permission to the user and group on the directory ‘software’?
10. Which DOS command is used to display system time?
11. What is use of ‘who’ command in Linux?
12. Which character is used to represent parent directory in Linux?
13. What is the name of hierarchical file system in DOS?
14. Which DOS command is used to delete a directory?
15. Which one of the following is the directory separator in Linux?
16. Which Linux command list the contents of all sub directory?
17. Which command is used to hide the file?
18. Which DOS command is used to list all com files in D drive?
19. Which command is used to hide the file?
20. Which character is used to represent a range of values in Linux?
21. What is use of ‘who’ command in Linux?
22. Which character is used to represent parent directory in Linux?
23. What is the use of CD command in DOS?
24. Which Linux command to set the permission ‘x’ to user, ‘rw’ to others and ‘rwx’ to group for the file launcher?
25. Write the Linux command to remove all the permission to the user and group on the directory ‘software’?

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