State whether it is true or false. If false, explain why? " Referring to a derived-class object with a base-class handle is dangerous. "
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State whether it is true or false. If false, explain why? " Referring to a derived-class object with a base-class handle is dangerous. " |
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- Create a class Rectangle with data members length, breath and height. Members functions of class should be Cal_Volume and Compare, to calculate volume of the box and compare two objects’ volume to check which object have greater volume. (Implementation: use this pointer). Course: (Object-oriented programming)In JavaScript, a constructor needs to link an object to other functions so that methods are performed only on the object that calls them. (a) True (b)False(Kotlin/Android Studio) When an Intent is created with a Context and Class object, it is considered an ______ intent. Multiple Choice generic activity implicit expliciy
- You cannot use the isinstance function to determine whether an object is an instance of a subclass of a class.(T/F)What is the concept of binding? Differentiate between early binding and late binding. (Write in maximum 5 lines) Write a Java operator/keyword, which can be used to check the validity of reference before attempting down-casting from superclass object to subclass reference. Given an example of it usage. (Write in maximum 5 lines)Differentiate between static and instance class members. Explain with proper example when you should make members static?
- (The Time class) Design a class named Time. The class contains: - The data fields hour, minute, and second that represent a time. - A no-arg constructor that creates a Time object for the current time. (The values of the data fields will represent the current time.) -A constructor that constructs a Time object with a specified elapsed time since midnight, January 1, 1970, in milliseconds. (The values of the data fields will represent this time.) -A constructor that constructs a Time object with the specified hour, minute, and second. - Three getter methods for the data fields hour, minute, and second, respectively. -A method named setTime (long elapseTime) that sets a new time for the object using the elapsed time. For example, if the elapsed time is 555550000 milliseconds, the hour is 10, the minute is 19, and the second is 10. Draw the UML diagram for the class and then implement the class. Write a test program that creates two Time objects (using new Time (), new Time(555550000),…Is it always necessary to have a semicolon at the end of a field declaration?Describe a signature of a constructor or method, and explain what overloading means