Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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- QUESTION 10 1 points A method that is declared final cannot be overridden in a subclass. O True O False 1 points QUESTION 11 The method with the same name as the class and no return type is the constructor of that class. O True Falsearrow_forwardDescribe the purpose of the default constructor.arrow_forwardThe ACTION and METHOD attributes are used in both forms and code to perform certain actions.arrow_forward
- Describe how you can use an interface as an alternative to a class to specify the type for a parameter.arrow_forwardin the date classOverload the constructor method as the class diagram showsIn the main program, create three objects of class date, one from each of the constructors.In the main program, overload the showdate method to display the date in the following formatsThe date in dd/mm/yy formatThe date in dd/mm formatThe date in “d of month” formatIn the main program, make use of each of the showdate methods, one with each of the created objects.Send your two files, the date file and the main program where you use the date constructor overload and the showdate method overload.arrow_forwardSelect the correct option for the question shown below.arrow_forward
- In order to do a range of tasks, both code and forms employ the ACTION and METHOD attributes.arrow_forwardA cash processing company has a class called Account used to process transactions: Method/Constructor Description public Account (Client c) public boolean process (Transaction t) constaucts an account using client information processes the next transaction, returning true if transaction was approved, false otherwise Account objects interact with Transaction objects, which have many methods including: Method/Constructor Description returns the value of this transaction in pennies (could be negative, positive or zero) public int value() The company wishes to create a slight modification to the Account class that filters out zero-valued transactions. Design a new class called FilteredAccount whose instances can be used in place of an Account object but which include the extra behavior of not processing transactions with a value of 0. More specifically, the new class should indicate that a zero-valued transaction was approved but shouldn't call the process method in the Account class to…arrow_forwardPortfolio Instructions: You are working for a financial advisor who creates portfolios of financial securities for his clients. A portfolio is a conglomeration of various financial assets, such as stocks and bonds, that together create a balanced collection of investments. When the financial advisor makes a purchase of securities on behalf of a client, a single transaction can include multiple shares of stock or multiple bonds. It is your job to create an object-oriented application that will allow the financial advisor to maintain the portfolios for his/her clients. You will need to create several classes to maintain this information: Security, Stock, Bond, Portfolio, and Date. The characteristics of stocks and bonds in a portfolio are shown below: Stocks: Bonds: Purchase date (Date) Purchase date (Date) Purchase price (double)…arrow_forward
- A main method can be placed inside a class definition. O True O Falsearrow_forwardA method CANNOT change the values of the instance variables of a class type that is an argument to the method call. True Falsearrow_forwardThe ACTION and METHOD attributes are utilized by both forms and code to accomplish a variety of tasks.arrow_forward
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