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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
Explain Derived and Non-Derived Attribute? In few cases, two or more attribute values are related, for instance, Age and BirthDate attributes of a person. For specific person e
Views in relational algebra: 1. Basic expression contains either a) A relation in the database. b) A constant relation. 2. General expressions are madde out of sma
average response time?
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
What is the function of IO/M signal in the 8085? It is a status signal. It is used to differentiate among memory locations and I/O operations. When this signal is low (IO/M = 0
Which operator is Cartesian product in relational algebra? Cartesian product in relational algebra is a binary operator. (It requires two operands. e.g., P X Q)
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
What is a PROJECT operation? The project operation is a unary operation that returns its argument relation with particular attributes left out. Projection is shown by pie (π).
To do the division operation R1 ÷ R2, R2 should be a correct subset of R1. In the following example R1 have attributes A and B and R2 have only attribute B so R2 is a correct subse
Insulation between conceptual and physical structures It can be defined as: 1. The Database Administrator should be capable to vary the storage structures without affectin
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