Database 1. Let A4, A5, and A6 be attributes in a relation R. If both of these functional dependencies hold: A4 → A5 and A5 → A6, then A4 → A6holds, because of the rule.
2. The fact that the value of a foreign key attribute must exist in another set of one or more key attributes in another table, is called a(n) .
3. Any set of attributes that allows us to identify unique rows (tuples) in a given relation are known as super keys. Out of these super keys we can always choose a proper subset among these which can be used as a key. Such keys are known as keys. If there is a combination of two or more attributes which is being used as the primary key then we call it as a key.

Does read theory have answers keys ?

This assignment continues work on the online booking facility introduced at the end of chapter- 10. the work will be continued in the assignments for chapters 14 and 15 (a) assume that you will produce your online booking facility using an agile approach. i. suggest the kind of user research you would like to conduct for your product before iteration cycles begin. ii prioritize the requirements for your product according to business value, i.e which requirements are likely to provide the greatest business benefit, and sketch out the ux design work you would expect to undertake during the first four iteration cycles, i.e. cycle 0, and cycles 1 to 3. (b) using one of the mockup tools introduced above, generate a mockup of your product's landing page, as developed in the assignment for chapter-11 (c) using one of the patterns websites listed previously, identify suitable interaction patterns for elements of your product, and develop a software-based prototype that incorporates all the feedback and the results of the user experience mapping achieved at the end of chapter-11. if you do not have experience in using any of these, create a few html web pages to represent the basic structure of your website

To add additional commands to the quick access toolbar, a user can navigate to the view. backstage status bar design file