41. Which one of the following commands is incorrect?
42. Which of the following command doesn't create a process?
43. Which of the following symbol is used for substitution command?
44. The PID of our login shell doesn't change.
45. Which symbol is used for evaluation of variables?
46. When we use ||, both the commands are executed.
47. Both the owner and group owner can be changed by . . . . . . . . call.
48. Which command is used to display the documentation of commands in UNIX?
49. Which of the following is a backup program?
50. Which of the following is not an option of cp command?
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