21. Which of the following system call is preferred over dup and dup2 for replicating file descriptor?
22. To copy 10 lines from the current cursor location, we can use . . . . . . . .
23. Kill -l will list all the signal numbers on our machine.
24. Which of the following operator is used with find command for performing the negate function?
25. Which option is used by the sort command to redirect the output to a specified file?
26. Which one of the following forms used with at command is invalid?
27. Which function can combine the functionalities of push, pop, unshift and shift?
28. Which one of the following is arguably the best shell to use?
29. For compiling a C program without leaving the editor, which command will be used?
30. Which of the following is not an internal command for more?
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