Operating System in Unix System : Practice MCQ Questions & Answers with Explanations

The find command with -mtime and -atime flags locates files based on modification and access times, and -ok rm {} \; prompts for confirmation before deleting.

The du (disk usage) command in UNIX/Linux is used to estimate and summarize file and directory space usage.

The sort command arranges the lines of text in alphabetical or numerical order by default.

In octal permission representation, read is 4 and write is 2, making the combined read and write permission equal to 6.

The cp command is used in UNIX/Linux to copy files, and specifying the destination directory (misc) copies the file with the same name.

The Bourne shell (sh) is the original and earliest standard shell developed for the UNIX operating system by Stephen Bourne.

The seventh and final field in the /etc/passwd file specifies the default login shell for the user.

The tail command outputs the last part (end) of files by default.

The mkdir (make directory) command is used in UNIX-like systems to create new directories.