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Illustrate the State model for the ATM class
let us take state model for the ATM class given below in Figure showing state model of the ATM class and the pseudo code derived from it. In this method first, we choose the key path of control, this corresponds to the reading of a card querying user for transaction information, processing transaction, printing a receipt and ejecting card. If the customer wants to process for any alternates control that should be provided. Such as if the password entered by the customer is bad then customer is asked to try again.
Control of states and events in ATM
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Attribute Preservation This is a easy and obvious necessity that includes preserving all the attributes that were there in the relation that is being decomposed.
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1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
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Determine the rule that a value of a foreign key should appear as a value of some particular table is called a Ans: Referential constraint. The rule that a value of a fo
Security And Integrity After Reading the concepts of database recovery in the last section, let us now deal with a vital concept that helps in minimizing consistency errors in
what is stracture of dabms
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