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Computer Science · all questions

UNIX
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Which of the following command is used for switching files?

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. . . . . . . . command is used for sorting a file on specified fields.

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The interval regular expression uses the character . . . . . . . .

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Which part of the UNIX operating system interacts with the hardware?

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Which function is used by perl for reversing a string?

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On a UNIX system, there can be . . . . . . . . shells running simultaneously.

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test command can be used to check which of the following?

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Which command is used to reverse the direction of repeating the search?

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For searching a character, . . . . . . . . and . . . . . . . . are used.

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What are the permission of file01 after executing this command?
chmod  777  file01

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The sort order can be reversed using . . . . . . . . option.

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To perform decision depending on the fulfillment of certain criteria, . . . . . . . . is used.

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We can use relative addressing while executing previous commands.

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The >> symbol is used to overwrite the existing file if it exists.

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Which command saves one copy of character stream in a file and store the other to standard output?

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If the file is write-protected and the directory has to write permission then we cannot delete the file.

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To yank from current cursor up to first occurrence of string str in reverse direction, we can use:

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userdel is used for removing users from the system.

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Which of the following signals are generated from the hardware?

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To append contents of buffer to file01, we can use . . . . . . . .

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