Unix interview questions part 15
Unix interview questions part 15
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Total Questions: 20
1. ____ system call is used for renaming a file, directory or symbolic link.
Correct Answer is : rename
2. S_IFxxx macros are used for checking the file types.
Correct Answer is : TRUE
3. Which of the following macro returns true if the file type is a directory?
Correct Answer is : S_ISDIR
4. For checking a file access rights, ___ system call is used.
Correct Answer is : access
5. Which of the following is used with access call for checking the owner’s permissions?
Correct Answer is : R_OK, W_OK, X_OK
6. chmod and fchmod calls are used for changing file permissions.
Correct Answer is : TRUE
7. Both the owner and group owner can be changed by ____ call.
Correct Answer is : chown
8. For changing the time stamps, _____ system call is invoked.
Correct Answer is : utime
9. System calls and library functions are same.
Correct Answer is : FALSE
10. Which of the following system call uses file descriptor as an argument?
Correct Answer is : read, write, close
11. A file can be recognized as an ordinary file or directory by ____ symbol.
Correct Answer is : –
12. How many types of permissions a file has in UNIX?
Correct Answer is : 3
13. Permissions of a file are represented by which of the following characters?
Correct Answer is : r,w,x
14. A file named abd.txt has the following set of permissions -rwxrwxrwx All the three operations i.e read, write and execute can be performed on the file by file owner, group owner and others.
Correct Answer is : TRUE
15. Which of the following symbol is used to indicate the absence of a permission of a file?
Correct Answer is : –
16. When we create a file, we are the owner of a file.
Correct Answer is : TRUE
17. What is group ownership?
Correct Answer is : group of users who can access the file
18. A file has permissions as rwx r– —. A user other than the owner cannot edit the file.
Correct Answer is : TRUE
19. If a file is read protected, we can write to the file.
Correct Answer is : FALSE
20. The write permission for a directory determines that ____________
Correct Answer is : we can add or remove files to it
