Describe the main activities performed by the database management systm.

computer science

Description

a) Describe the main activities performed by the database management systm. 
b) For the following scenario, identify the necessary classes and draw a class diagram. The diagrams should include the classes, their attributes, relationships and multiplicities. Add as many methods to the classes as necessary. The task is to draw a class diagram for a simple banking system. Consider the following facts when modelling the bank operations: 
• A bank has different branches 
• Branches maintain current or saving accounts for customers 
• The customers are given debit cards to use their accounts 
• The bank runs a number of ATMs

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