Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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The __________ declares that this method overrides a method in the base class.
a. override keyword
b. class keyword
c. virtual keyword
d. base keyword
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- class Duration: def __init__(self, hours, minutes): self.hours = hours self.minutes = minutes def __add__(self, other): total_hours = self.hours + other.hours total_minutes = self.minutes + other.minutes if total_minutes >= 60: total_hours += 1 total_minutes -= 60 return Duration(total_hours, total_minutes) first_trip = Duration(3, 36)second_trip = Duration(0, 47) first_time = first_trip + second_tripsecond_time = second_trip + second_trip print(first_time.hours, first_time.minutes) what is the outputarrow_forwardWrite a class called Game that contains a video game’s name, genre, and difficulty Level. Include a default constructor and destructor for the class. The constructor should print out the following message: “Creating a new game”. The destructor should print out the following message: “In the Game destructor.” Include appropriate get/set functions for the class. In main(), prompt the user to enter the number of games he or she has played in the past year. Dynamically create a built-in array based on this number (not a vector or object of the array class) to hold pointers to Game objects. Construct a loop in main() that executes once for each of the number of games that the user indicated. Within this loop, ask the user to enter the name and genre of each game. Using a random number generator, generate a difficulty Level between 1-10 (inclusive). Seed this random number generator with 100. Next, dynamically create a Game object (remember that this requires the use of the “new”…arrow_forwardWhen you code a class that implements an interface, you don’t need to implement its ___________ methods.arrow_forward
- 1- Design a class named Rectangle to represent a Rectangle. The class contains: • three variables integer data field named height, integer data filed named width and integer data filed named length. The default values are 1 for height, length, and width are 1.0 for each of them respectively. • A no-arg constructor that creates a default Rectangle. • A constructor that creates a Rectangle with the specified height, length and width. • A method named getVolume() that returns the volume of this Rectangle. (Volume = height * width * length) %3! 2- Write a test program called Test Rectangle that: • Creates two Rectangle objects: one object with height 11, length 5, and width 7, the other object with height 10, length 2 and width 6 • Display the volume of each Rectangle object.arrow_forwardCode should be in Pythonarrow_forwardQuestion 3 Encapsulation is supported by ___________arrow_forward
- Question 31 class Person: def __init__(mysillyobject, name, age): = name mysillyobject.name mysillyobject.age = age def myfunc(abc): print("Hello my age is", abc.age) p1 = Person("John", 36) p1.age = 40 p1.myfunc() O 40 Hello my age is 40 36 Hello my age is 36arrow_forwardPersonal Information Class: Design a class called Employee that holds the following data about an employee: name ID number Department Job Title Class. Store your class in a separate file called employee.py. Your class will have an initializer method that will be passed the information entered by the user as arguments. Write appropriate accessor and mutator methods for each data attribute. Write a __str__ method to print the contents of the class (see example of __str__ on p. 523). Main program: Your main program should create three instances of the class. Your program should get the information from the user and pass it as parameters to the initializer method. Using the __str__ method invoked by the print function, the program should display the personal information for the three individuals. Output and Sample Dialog: Enter employee name: Mary Smith Enter employee ID: 123456 Enter department: Accounting Enter position: Accountant Enter employee name: Joe Morales Enter…arrow_forward
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