Q. Which option is used with du command for finding only the summary of disk usage by a specific directory?

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Q. du command can also be used for reporting the disk space consumed by each user.

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Q. For displaying the archive, -t option is used with the tar command.

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Q. A system call is a routine built into the kernel and performs a basic function.

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Q. When we execute a C program, CPU runs in ____ mode.

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Q. In ____ mode, the kernel runs on behalf of the user.

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Q. All UNIX and LINUX systems have one thing in common which is ____

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Q. The chmod command invokes the ____ system call.

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Q. For reading input, which of the following system call is used?

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Q. Which of the following system call is used for opening or creating a file?

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Q. There are ___ modes of opening a file.

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Q. Which of the following mode is used for opening a file in both reading and writing?

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Q. open system call returns the file descriptor as ___

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Q. Which of the following system call is used for closing a file?

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Q. close system call returns ____

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Q. ____ system call is used for writing to a file.

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Q. write system call returns -1 when ___________

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Q. ____ system call is used for positioning the offset pointer.

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Q. Which of the following offset is used with lseek system call to set the offset pointer to the end of the file?

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Q. Which of the following system call is used for truncating a file?

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