Explain how you can specify which users are allowed to create cron jobs and which are not.
What will be an ideal response?
You can specify which users are allowed to create cron jobs and which aren't by creating the following two files:
• /etc/cron.allow. Users listed in this file can create cron jobs.
• /etc/cron.deny. Users who are not listed in this file can create cron jobs.
By default, the /etc/cron.deny file already exists with its own entries, including the following:
• guest
• gast
If the /etc/cron.allow file exists, it is the only file evaluated; /etc/cron.deny will be ignored in this situation. If neither of these files exists, only the root user is allowed to define user cron jobs.
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What is the output of the following code, given the function definition below?
What is the output of the following code, given the function definition below? int a = 7, b = 12; tester (a, b); cout << a << “ “ << b; void tester (int m, int &n) // function definition { n = n - 2 * m; m = 2 * m; } a) 7 -2 b) 7 12 c) 14 -2 d) 14 12
The ________ is a logical representation of the data in a database that allows the relationships between the data to be considered without concerning oneself with the physical implementation of the underlying data structures.
a) relational database model b) logical database model c) structured database model d) none of the above
To insert a letter A with an accent mark into a Web document, you may use any of the following except ____.
A. numeric character reference B. character entity C. the ‘A' character and a backslash D. character entity reference
A computer application, such as Microsoft Word, used primarily with text to create, edit, and format documents.
What will be an ideal response?