Answer:
The answer to this question is given below in this explanation section.
Explanation:
In the relationship model of database a primary key is a specific choice of a minimal set of attributes that uniquely specific a tuple in a relation.Informally a primary key is which attribute and in simple cases are simple a single attribute.More formally a primary key is a choice of candidate key any other candidate key is an alternate key.
A primary key may consists of real word observable in which way it is called natural key,while an attribute created to function as a key and not use for identification outside the database is called a surrogate key.For example for a database of people time and location of birth could be a natural key.National identification number is another example of an attribute that may be used as an natural key.
Answer:
<em>C</em>
Explanation:
technology deals with the use of computers in school and work
Answer:
C. deriving benefits from highly focused and high technology markets
Explanation:
Firms that engage in cost-leadership approach seek to combine a low per-unit income with large sales for profit making purposes. Typically, but not always, they are more inclined to market their products and services to a large population base or a niche with a high demand volume. While differentiation enables a company to accomplish a competitive advantage. A Competitive advantage enables a company to achieve more strides over other companies offering related product substitutes. It is an important marketing process that is of critical economic importance to a business.
It should be noted that deriving benefits from highly focused and high technology markets is not part of the approaches to combining overall cost leadership and differentiation competitive advantages.
