Canvas0← → XO E QED Question 17Which of the following is true?XA)A class can only implement one classA class can extend many classesB)A class can only extend one classA class can implement many classes()A class can extend many classesA class can implement many classesD)A class can only extend one classA class can only implement one classосOD4O AOBF7F82ptsF10F11F12LE

We have been given four option about class We have to explain which option is correct and why and…

C Which of the following is true? A) A class can only implement one class A class can extend many classes B) A class can only extend one class A class can implement many classes C) A class can extend many classes A class can implement many classes D) A class can only extend one class A class can only implement one class OC OD 4 O A OB

C Which of the following is true? A) A class can only implement one class A class can extend many classes B) A class can only extend one class A class can implement many classes C) A class can extend many classes A class can implement many classes D) A class can only extend one class A class can only implement one class OC OD 4 O A OB

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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10 - Which of the followings are true for interfaces. I) An interface can contain public static final data fields II) Interfaces are implemented by classes using the "extends" keyword. III) A class can implement multiple interfaces. IV) Many classes can implement the same interface. V) Methods defined in an interface can contain implementations. a) O Only IV b) O I, III, IV, V c) O I, II, III, IV, V d) O I, IV e) O I, II )O I, III, IV
1. Which of the following will dynamically allocate a double? a. double* ptr=double x; b. double* ptr=double x(0); c. double* ptr=new double; d. none of the above 2. Copy constructors are generally required for a class when 3. a. For all classes b. When the class contains members that point to dynamically allocated memory c. When the class is passed by reference to a non-member function and the values are changed d. None of the above are member functions that are called automatically when an object of the class type is instantiated and the object goes out of scope is called when that 4. Given the following statement: float* ptr=new float[10]; The proper syntax to deallocate the memory is a. delete ptr b. delete[] ptr; c. delete ptr[]; d. none of the above 5. The difference between opening a file in ios::app mode, versus ios::out mode is that a. app mode will append data to the end of the existing data in the file while out mode will destroy the existing data in the file. b. App mode…
in c++ Define another new class named “Item” that must inherit from the given Name class. This Item class will manage the following info: name (string) and price (double). It must prevent the creation of an Item object with either an empty or all-blank name. This class must at least complete the methods defined in the Name class: toString method returns a string representation of the Item object in the format of “ITEM( <name> ) PRICE($ <price> ) such as ITEM(eraser) PRICE($1.05) contains method that accepts a search string and returns true if only the name of the item contains the search string as a substring. It returns false otherwise. isTheSame method that compares two Item objects and returns true only if both Item objects have the exact same name (regardless of the price) and false otherwise. Please note that if the given object in the parameter is not an Item object, it will return false.
6. class PPP int H: protected : int S; public : void input (int); void out (); }; class Q0Q : private PPP int T; protected : int U; public : void indata (int, int); void outdata (); }; class RRR : public Q0Q int M; public : void disp (); }; int main () 002 objl; RRR obj2; return 0; a. In the above code, is the member function out() accessible by obj1? b. Name the member function(s), which can be accessed from the obj2? c. Name the data member(s) that can be accessed from function disp().
1)Create a complete Java class that can be used to create a Computer object as described below:A Computer has a:- Manufacturer- Disk Size- Manufacturing Date- Number of coresa) Add all instance variables (data encapsulation is expected).b) The class must have getters and setters for all instance variables.c) The class must have two constructors: a no-arg constructor and a constructor thatreceives input parameters for each instance variable.d) Implement a toString() method for your class. 2)Write a Java program TestComputer, which creates three Computer objects with the informationbelow:a) - Manufacturer: Dell- Disk Size: 1189160321024 bytes- Manufacturing Date: April 1, 2020- Number of cores: 2b) - Manufacturer: Apple Inc- Disk Size: 269283712040 bytes- Manufacturing Date: March 31, 2020- Number of cores: 4c) Create your own Object. You can mimic your actual personal computer or use a no-argsconstructor.Print the three objects using toString() method to show all data fields
C++ Dont include new files. READ ME PetsBreed ClassCreate a Breed class with the following: Member VariablesCreate the following private member variables, all of type std::string: species_breed_name_color_ConstructorsCreate a default constructor for Breed that sets its species_ to "Dog", breed_name_ to "Pug", and color_ to "Fawn".Create a non-default constructor that receives a std::string for species_, breed_name_, and color_; in that order. The values from the constructor should appropriately assign the member variables.Accessors and MutatorsCreate accessors and mutators for all member variables, following the naming conventions covered in class. e.g. for species_, name the accessor Species, and the mutator SetSpecies. Pet ClassCreate a Pet class with the following: Member VariablesCreate the following private member variables: std::string name_Breed breed_double weight_ConstructorsCreate a default constructor for Pet that sets its name to "Doug" and weight to 15.6. The Breed object…
- Simple factory is not considered a design pattern because it does not decouple the client from concrete classes Select one: True False 2- structural patterns provide guidance on the way in which classes interact to distribute responsibility Select one: True False 3- The Simple factory is used when you want to limit the instantiation of classes to one implementation Select one: True False 4- When a class A is composing a reference to another class B, then we say that class A has-a class B relationship Select one: True False
Write a program that declares two classes. The parent class is called Simple that has two data members’ num1 and num2 to store two numbers. It also has four member functions.· The add() function adds two numbers anddisplays the result.· The sub() function subtracts two numbersand displays the result.· The mul() function multiplies twonumbers and displays the result.The div() function divides two numbersand displays the result. The child class is called Complex that overrides all four functions. Each function in the child class checks the value of data members. It calls the corresponding member function in the parent class if the values are greater than 0. Otherwiseit displays error message.
IN C++ Lab #6: Shapes Create a class named Point. private attributes x and y of integer type. Create a class named Shape. private attributes: Point points[6] int howManyPoints; Create a Main Menu: Add a Triangle shape Add a Rectangle shape Add a Pentagon shape Add a Hexagon shape Exit All class functions should be well defined in the scope of this lab. Use operator overloading for the array in Shape class. Once you ask the points of any shape it will display in the terminal the points added.
#Python IDLE: #Below is my Pizza class ,how would I write the function described in the attached image,based on this class? # The Pizza class should have two attributes(data items): class Pizza: # The Pizza class should have the following methods/operators): # __init__ - # constructs a Pizza of a given size (defaults to ‘M’) # and with a given set of toppings (defaults to empty set). def __init__(self, size='M', toppings=set()): self.size = size self.toppings = toppings # setSize – set pizza size to one of ‘S’,’M’or ‘L’ def setSize(self, size): self.size = size # getSize – returns size def getSize(self): return self.size # addTopping – adds a topping to the pizza, no duplicates, i.e., adding ‘pepperoni’ twice only adds it once def addTopping(self, topping): self.toppings.add(topping) # removeTopping – removes a topping from the pizza def removeTopping(self, topping):…
Python programming Implement a constructor for the Person class Implement a constructor for the Student class Create a student with name; Albert Einstein, ramq: 14031879-1235, address: 112 Mercer Street, Princeton, courses: (1)Physics & (2)Relativity where the grades were b and a respectively and with enrollment date: 1895
Define a class called token number that incorporates a token’s number (could be the last 3 digits of your arid number) and its location. Number each token object as it is created. Use two variables of the angle class to represent the token’s latitude and longitude. A member function of the token class should get a position from the user and store it in the object; another should report the serial number and position. Design a main() program that creates three token, asks the user to input the position of each, and then displays each token’s number and position. Note: Solve this program in C++