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Differentiate sub-class and super-class?
The specialization of a class is known as subclasses.eg: employee is a subclass of person and teller is a subclass of employee. Conversely, employee is a super class of teller, and person is a super class of employee.
Forward Recovery (Redo): In this system the committed changes made by a transaction are reapplied to a previous copy of the database. In simpler
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
What is an Operand? The data on which the operation is to be performed is known as an Operand
In an organisation various projects are undertaken. Each projects can employ one or more employees. Every employee can work on one or more projects. Each project is undertaken on
Define null values. In some cases a certain entity may not have an applicable value for an attribute or if we do not know the value of an attribute for a certain entity. In the
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
What types of adjustments are required to increase chances of inheritance. a) Some attributes can be added or ignored in the base class operation b) Some changes can be
SET concept is used in which type of modelling? SET concept is used in Network Model.
Smart Alex Catering Sevice (SACS) is a company offering top class catering staff for prestigious events. The company employs approximately 200 hourly paid contact staff - chefs,
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