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.
Huh???????................
A) Social Collaboration
Social Collaboration is a way for people to combine their information and make it easier to go through and to work well as a team.
Director of IT role is major decision maker or any IT related issue such as network security, database, network issues etc. As policy to one to one end user and it department, which should cover as follows.
1. End-user is not allowed to share files or media files to any user through email or social media.
2. Login password should not be changed without IT approval of pc or workstation or laptop. Once changes password should be shared to IT department.
3. Sharing password Wi-Fi or access point to outsiders to be avoided.
4. Connecting usb drive or flash drive to workstation or laptop,
5. Own laptop or smartphone should not be connected to office network.
6. If workstation or desktop or laptop is effected with virus immediately to be reported to IT department.
