1. public class Test2 { static void method1() { } void method20) { } } Method method10 can directly call method20 Method method20 can directly call method10 Test2.method10) is valid invocation of method10 Test2.method20) is a valid invocation of method20
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- Object Oriented Programming: 213COMP, 214COMP (Feb-2022) Assignment- I [10 marks] Academic honesty: O Only pdf file accepted & student ID, will be your upload file. O Student who submit copied work will obtain a mark of zero. O Late work or attach file by email message not allowed. Q1: Write the signature for a method that has one parameter of type String, and does not return a value. Q2: Write the signature for a method that has two parameters, both of type Student, and returns an int value. Q3: Write the constructor's headers of the followings? new Student (202101156, “Ahmed"); new Address(51, "jazan university","CS&IT" ); new Grade(true, 505235600, 4.5); Q4: a) Write a class Student that define the following information: name, stid , age. b) Explain a mutators (setters) and accessors(getters) methods for each attributes(fields). c) Add three constructors: • with empty constructor. one parameter constructor (name of student) two parameters constructor (name and stid) d) Create two…1. For methods parameters are specified in the method definition, arguments are provided during a method call arguments are specified in the method definition, parameters are provided during a method call arguments override parameters parameters encapsulate arguments 2 Local variables are not automatically initialized. True False 3 Composition refers to an 'is-a' relationship. True False 4 Class constructors must be declared with a return type equal to the class. True False 5 Object instances are created using the “new” keyword. True FalseValue-returning methods must pass parameters. -True or -False
- A method CANNOT change the values of the instance variables of a class type that is an argument to the method call. True False8. Question 8 Which of the following statements is correct for a method which is overriding the following method: public void add(int a) {…} Pick ONE options the overriding method must return void the overriding method must return int the overriding method can return whatever it likesTrue or False A static method can reference an instance variable.
- private float c; private void method2(double y) { c = y; } in another class we created an object of the first class then within in it : tester.method2 (10.0f); are there any errors ? how many errors if there are any and with explanation please.D: A 21. The method finalize automatically executes when the class object goes out ofI Scope. 22. A mutator method ofa class changes the values of the data members of the class. 23. In Java, the reference this is used to refer to only the methods. not the instance variables of a class.Assume that a method with the header public static void methodA () is defined in a class named Main. Which of the following methods can be defined in the same class? (Select all that apply) Opublic static void methodB() public static String methodA() O public static void add(String s) Opublic static void methodA(String b) O public static double methodĄ()
- O Static Method QUESTION 7 A protected method can be overridden as a public method. O True O False QUESTION 8Java code Write the header for a public method named doStuff that has no parameters and no return value. Remember to include the opening brace for the method. Assume that the method will be in the main class and called directly by the main method.JAVA HELP please Method Overloading is a feature that allows a class to have more than one method having the same name, if their argument lists are different. Design a simple class and define a maximum method that finds the maximum of two integer values? Design an application to test that your new method is working properly. Now overload the maximum method to accept three double values and return the maximum of these three values? Finally overload the maximum method again such that it accept four double or four integer values and return the average of these four values? Modify your main( ) application to call and test these new methods. In each case the maximum overloaded methods should return the correct maximum values. Attach you java source codes and a screenshot of the output(s).