Unix interview questions part 41
Unix interview questions part 41
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Total Questions: 20
1. The sort order can be reversed using ___ option.
Correct Answer is : -r
2. We can perform sorting on secondary key also using sort command.
Correct Answer is : TRUE
3. We cannot perform sorting on columns using sort command.
Correct Answer is : FALSE
4. Which option is used when we’ve to sort files containing only numbers?
Correct Answer is : -n
5. _____ option is used with sort command for removing repeated lines.
Correct Answer is : -u
6. Which option is used by the sort command to redirect the output to a specified file?
Correct Answer is : -o
7. The name of the input and output files cannot be same while using sort command.
Correct Answer is : FALSE
8. To check whether the file has actually been stored in the default order, we can use ____ option.
Correct Answer is : -c
9. Which option is used with sort command to sort multiple files collectively?
Correct Answer is : -m
10. A system call is a routine built into the kernel and performs a basic function.
Correct Answer is : TRUE
11. When we execute a C program, CPU runs in ____ mode.
Correct Answer is : user
12. In ____ mode, the kernel runs on behalf of the user.
Correct Answer is : kernel
13. All UNIX and LINUX systems have one thing in common which is ____
Correct Answer is : set of system calls
14. The chmod command invokes the ____ system call.
Correct Answer is : chmod
15. For reading input, which of the following system call is used?
Correct Answer is : read
16. Which of the following system call is used for opening or creating a file?
Correct Answer is : open
17. There are ___ modes of opening a file.
Correct Answer is : 3
18. Which of the following mode is used for opening a file in both reading and writing?
Correct Answer is : O_RDWR
19. open system call returns the file descriptor as ___
Correct Answer is : char
20. Which of the following system call is used for closing a file?
Correct Answer is : close
