What is not true about opening a database in exclusive mode?
A. It ensures that you are the only one using the database at the moment.
B. It is the default mode when opening a database.
C. It must be used to add a password to a database.
D. It must be used to add encryption to a database.
Answer: B
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Which of the following statements about primary storage is true?
A. Primary storage is the same as virtual memory. B. Primary storage is volatile. C. Primary storage is a storage format that can store data and application when the system in not in use. D. Primary storage is memory that is access sequentially.
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?