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UNIX
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Q661

We can also duplicate the file descriptor using . . . . . . . .

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Q662

Which one of the following command is used for replacing | with : globally?

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Q663

Which option is used for displaying the line numbers containing the pattern along with lines?

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Q664

The -a option when used with ps command lists processes of all users but doesn't display the system processes.

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Q665

To remove all other windows except the current one, which of the following command is used?

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Q666

The shell waits for the command to complete and normally can't do any work while the command is executing.

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Q667

To add elements to the right side of the array . . . . . . . . function is used.

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Q668

When a string is used for numeral computations, perl converts it into . . . . . . . .

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Q669

Address space of a process is virtual.

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Q670

Which of the following symbol is used with chmod to assign permission to a file?

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Q671

truncate needs the . . . . . . . . of the file as an argument but ftruncate works with . . . . . . . .

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Q672

Substitution command is an ex-mode command.

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Q673

It is often more convenient to save perl program files with . . . . . . . . extension.

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Q674

The size of /dev/null is always zero.

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Q675

. . . . . . . . option is used when we need to match multiple patterns in a single invocation of grep command?

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Q676

The parent process picks up the exit status of a child using . . . . . . . . system call.

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Q677

To replace a single character, we use . . . . . . . . command

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Q678

While changing permissions in an absolute manner, we explicitly set all the nine bits irrespective of the previous permissions of the file.

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Q679

Commands inputted in command mode don't appear on the terminal.

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Q680

Which of the following is default permission set for directories?

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