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Explain what is Aggregation ?
Aggregation: This is used whenever we intend to show a relationship between an entity and the relationship. There is no provision for this in the ER Model. This is shown by placing the relationship between two entities along with the entities in a box and setting up a relationship between this box and another entity.
Can a domain, assigned to a data element be changed? Yes. We can do so by just overwriting the entry in the field domain.
explain three types of internet risks to the consummers whent he business system is data dependent. how can we minimise these risks
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
Give some encryption techniques? A) DES B) AES C) Public key encryption
For problems 1-4, give all candidate keys for the tables with FDs specified. Composite candidate keys must be put in parentheses, and candidate keys must be separated with commas
Regional Gardens has many nurseries, including Wagga Wagga, Bathurst, Albury, Orange, and Dubbo. Each nursery is known by its campus code, eg WW, B, A, O and D respectively. Additi
ER diagram on cosmetics
Economics: It is now usually accepted that it costs less to make a system of smaller computers with the equivalent power of a one large computer. It is more cost-effective to get s
Describe briefly models which define the operations on classes. The three models which are used to define operations on classes are as: Object Model = data dictionary + Obje
gyan gurukul is a software company that provides software related solution.
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