UNDERSTANDING COMPUTER FILES
FILE SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An operating system knows what default application software to use to open a file by ____
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examining the full contents of the file
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sending messages to all the installed applications to request permission
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looking at the file extension & its list of default software for each extension
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None of the above
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Explanation:
Detailed explanation-1: -In almost every high-level language, the function that opens a file is a wrapper around the corresponding kernel system call. It may do other fancy stuff as well, but in contemporary operating systems, opening a file must always go through the kernel.
Detailed explanation-2: -operating systems and applications both may use file contents or file attributes (such as name) to determine how to treat a file. Microsoft Windows uses file suffix (such as .exe ) pervasively, but even for that, there are different binary formats for “.exe” files (corresponding to the resources they need).
Detailed explanation-3: -The default file extension for all Word documents is ‘. docx’.
There is 1 question to complete.