View which is used to specify the tables fields , their data types and properties
2 answers:
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Answer:
See explaination
Explanation:
Clearly the entities are as follows:-
Course
Section
Room
Test
The relationship among entities are as follows:-
Course has Section
Test is conducted for Course
Test is conducted in Section
Test is conducted in Room
Attributes of each entities are as follows:-
Course (CourseID, Name, Department)
Section (SectionID, Enrollment)
Room (RoomNumber, Capacity, Building)
Test (Time)
Section is a week entity as, there may be same sections for different courses, therefore section uses the primary key of course entity as foreign key.
Also entity Test is dependent upon the entities Room,Section and Course, therefore primary keys of these entities will be used as foreign key in the Test entity.
Check attachment for the ER diagram
Cryptography is not a reason to use when posting photos on a public social media website.
Cryptography is the use of certain techniques that help protect important and personal information from being accessed by other parties. This technological practice or method allows a person to send sensitive or personal information over the internet without risking any "leak" of information.
- Cryptography literally means "hidden writing", which is what the method is all about.
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Cryptography not only allows a person to maintain certain privacy and security but also help the smooth functioning of businesses and other national security works. Thus, cryptography is the "security" of individuals in the 'internet world'.
Learn more about cryptography here:
