What does it mean that a method or class is abstract?

(a)Definition of class Vehicle Instance variables: year                 that holds the year of vehicle (int) make               that holds the make of vehicle (string)   Methods: a second constructor that accepts the Vehicle's year and the make as arguments. These values should be assigned to the object's instance variables: year and make.  Accessor methods (getYear() and getMake()) that get the values of instance variables Mutator methods (setYear(int) and setMake(String)) that set the values of instance variables. toString() should return a string with the values of instance variables of vehicle object  equals() should accept a vehicle object reference as argument and return true if all instance variables of calling object are same values as those of passed vehicle object, respectively, or false otherwise.   brake() should do nothing (i.e., empty body). This method is for polymorphism to call appropriate brake() method of subclass.   (b)Definition of class Car, which is a…

Common object behavior can be expressed using interfaces or abstract classes.What elements should you take into account when choosing between using an interface and an abstract class?

language: Java Class Inheritance with an abstract class   Define a class Employee with the following fields: _name, _empId, _department, _position (_title), _yearlySalary, _fullTime (a boolean: true/false) , _month , _year (time of hire)   Add constructor and properties   Define an abstract method GetBiMonthlySalary() (if the employee is paid twice a month)   Define an abstract method GetVacationTime() that returns the number of vacation time this employee would have based on time of hire     Override the ToString() method to return a string that contains the information pertaining to an employee such as name, empId, department, and where full time or not.     Define a class HourlyEmployee that inherits from Employee. This class should have 2 fields of its own: _hours (hours worked in half a month) and _wage (hourly wage) Provide necessary constructor, properties and methods   Override the ToString() to also return the additional fields   Gets 3 days of vacation after first year if the…

QUESTION 5 All methods in an abstract class must also be declared abstract. True False QUESTION 6 All fields declared in an interface are treated as final and static have protected access must be initialized in the class implementing the interface have private access

Both abstract classes and interfaces may be used to specify the behavior of common objects.Which factors should you examine when deciding between an interface and an abstract class?

Declare an interface named Employee with the methods named sALARY and bEHAVIOR declarea concrete class which will implements the methods of Employee (using java)

PROGRAMMING LANGUAGE: JAVA SUBJECT: ADVANCED OOP WITH JAVA   QUESTION NO 1: Make an abstract class named A1 with 2 abstract methods, then implement those methods in child class.

OBJECT ORIENTED PROGRAMING: Differentiate between static binding and dynamic binding using two examples of  each?