Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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When you instantiate an object from a class, you give a name to this particular object so that your
program can distinguish it from other objects you instantiate from the same class.True
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- A class object can encapsulate more than one [answer].arrow_forwardSummary In this lab, you create a derived class from a base class, and then use the derived class in a Python program. The program should create two Motorcycle objects, and then set the Motorcycle’s speed, accelerate the Motorcycle object, and check its sidecar status. Instructions Open the file named Motorcycle.py. Create the Motorcycle class by deriving it from the Vehicle class. Call the parent class __init()__ method inside the Motorcycle class's __init()__ method. In theMotorcycle class, create an attribute named sidecar. Write a public set method to set the value for sidecar. Write a public get method to retrieve the value of sidecar. Write a public accelerate method. This method overrides the accelerate method inherited from the Vehicle class. Change the message in the accelerate method so the following is displayed when the Motorcycle tries to accelerate beyond its maximum speed: "This motorcycle cannot go that fast". Open the file named MyMotorcycleClassProgram.py. In the…arrow_forwardA field has access that is somewhere between public and private. static final Opackage Oprotectedarrow_forward
- Portfolio 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_forwardtrue of false: a) The first step in any programming task is to start coding. b) The only places we would ever want to put a comment in our code are above a method and above a class.arrow_forwardWhat invokes a constructor which initializes an object, and returns a reference of the object created? public new static importarrow_forward
- A method that returns the value of an object's instance variable is calleda(n)a) mutator b) function c) constructor d) accessorarrow_forwardA class allows other programs to use a class s code through a. references b. objects c. methods O d. argumentsarrow_forwardTrue or False: During method calls, the value of a local variable is preserved.arrow_forward
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