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:
a computer suitable for use at an ordinary desk.
noun: desktop computer
"a new low-end desktop"
Explanation:
please mark me as a brainly
Out of the ones that you mention, the correct answer should be
<span> Operating system</span>
Answer:
Trojan horse
Explanation:
Trojan, also known as Trojan horse is a type of malware that ensures that its users are misled of its true purpose. They are a common type of virus and are very dangerous in such a way that they can even hide within other programs that are harmless. Once installed, Trojan will infect every file on your computer and can even steal information or totally infiltrate your system.
