A(n) _____ content model is a list of child elements that follow a defined order.
Fill in the blank(s) with the appropriate word(s).
sequence
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A(n) ________ performs a calculation on a column of data and returns a single value
A) aggregate function B) SUM function C) Grouping & Totals group D) SELECT clause
File protection based on access permissions is provided by a mechanism that prevents users from accessing each others’ files when they are not logged on as the owner of a file. As the owner of a file, you can attach certain access rights to the file that dictate who can and cannot access it for various types of file operations. This scheme is based on the types of users, the types of access permissions, and the types of operations allowed on a file under LINUX. Without such a protection scheme, users can access each others’ files because the LINUX file system structure (see Figure 7.2) has a single root from which hang all the files in the system. The number of protection bits needed to implement this scheme is equal to the product of the number of types of users and the number of types of
What will be an ideal response?