11. To know the exit status of a command, we can use . . . . . . . .
12. Which command is used to insert text before the current cursor location?
13. Which of the following operators are used for logical execution?
14. Which option is used for reading an awk program from a file?
15. -n option is used with cp command for what purpose?
16. For restoring the contents of numbered buffers efficiently, . . . . . . . . command is used.
17. Which of the following commands let us perform a set of instructions repeatedly?
18. Which command is used for translating characters?
19. In how many broad categories, files are divided into UNIX?
20. The . . . . . . . . option in case statement matches any option not matched by the previous options.
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