Answer:
b. foreign key
Explanation:
In the database world, a foreign key is a field on one table and a primary key for another table. The purpose of a foreign key is to provide linkages between two or more tables. Given two tables A and B, and making A the point of reference, a primary key is a field that is unique in A while a foreign key is unique in B.
On another hand, a composite primary key is a combination of two or more fields/columns on database table that can be used to uniquely identify each row in the table.
In the database lingua, what we have is a unique key not a distinct key, though the two words are similar in meaning.
A duplicate key is used when an information may be repeatedly entered on a table.
So the correct option is a foreign key.
Answer:
writing code for a software program.
Explanation:
Software development life cycle (SDLC) can be defined as a strategic process or methodology that defines the key steps or stages for creating and implementing high quality software applications.
Some of the models used in the software development life cycle (SDLC) are; waterfall model, incremental model, spiral model, agile model, big bang model, and V-shaped model.
The five (5) standard stages of development in software development are;
I. Analysis.
II. Design.
III. Implementation (coding).
IV. Testing.
V. Maintenance.
A typical day in programming and software development would involve writing code for a software program.
Generally, software applications or programs require a code containing series of sequential instruction to perform specific tasks, commands and processes. These sets of code are typically written by a software developer (programmer).
