This is called a key attribute!
There are different types of key attributes!
Primary key is the key that is actually chosen, for example a social security number.
There is also a unique key, say our finger prints! they also uniquely identify humans, but usually we prefer to use social security number when we list people (a unique key could be a primary key if we chose so)
We could also identify people by their social security number and a name, but this is unnecessary, as social security number already gives a full identification. Such a reduntant key is called super key.
Answer:
The answer is "option c".
Explanation:
A Web-centered view ensures anything has been programmed for the Web app or program. example Webified. This is a definition, that is used for personal use only and all other duplication is strictly forbidden without the approval of the author. and other options are not correct that can be defined as:
- In option a, the legacy system is a method that is obsoleted today.
- In option b, The mission-critical systems are used in the navigational system.
- In option d, A distributed system permits the sharing of information that includes software that is connected with a network.
B is the correct answer to ur questions
