Consider the following description of a university system where professors teach courses in which students can enrol: Each professor has a name, address, phone number, email address, and salary. A student has also a name, address, phone number and email address. A student also has an average mark (of the final marks of his or her course). Each person in the university has a unique id. A Course has a name, a number, and fees. When a student is enrolled in a course, the marks for this enrolment are recorded and the current average as well as the final mark (if there is one) can be obtained from the enrolment. Each student can obtain a list of courses he or she is enrolled in. Professors teach courses. Each course has at least one and at most three teachers. a) Draw a class diagram for this university? Draw by computer not handwriting b) Add attributes and methods (operations) when necessary.

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Types of database architectures

A Database Architecture represents the Database Management System’s (DBMS) design (schema). The DBMS architecture makes it easy to understand the components involved in the database system and their relations. The DBMS architecture may vary based on the system on which it runs. Some systems contain both client and server machines whereas some run only on a server machine. Based on the architecture, the system can be classified as centralized, decentralized, or hierarchical.