COP 3330 exam 3 Questions with Correct Answers Latest Update

COP 3330 exam 3 Questions with Correct Answers Latest Update Default methods allow interfaces to have method ______________. - Answers implementations A class that implements the _______ interface must provide ________________ for all methods of both interfaces. - Answers child, implementations When a class implements an interface the class must provide implementations for all interface methods unless it is ___________. - Answers abstract A class that inherits an abstract class must _____________ all of its abstract methods, unless it is also declared abstract. - Answers implement If you try to instantiate an abstract class the program will not ____________. - Answers compile Abstract classes can also have __________________. - Answers constructors The keyword ___________ is used to to define an abstract method. - Answers abstract An abstract class can have both abstract and non-abstract ___________. - Answers methods The container __________ allows you to store key-value pairs and provides constant-time performance for basic operations like get() and put(). - Answers HashMap A __________ doesn't allow duplicate elements. - Answers HashSet An interface is not a class. (true/false) - Answers true An interface forces classes to have ___________. - Answers methods In an interface, _____________ is used instead of "extends." - Answers implements The _______ of an interface method is given by an implemented class. - Answers body Both abstracts and interfaces cannot create __________. - Answers objects On implementation of an interface, you must ___________ all methods. - Answers override An interface CANNOT contain a ______________. - Answers constructor Unlike interfaces, abstracts CAN have a _____________. - Answers constructor To inherit from a superclass, a subclass or, child class, must use the _________ keyword. - Answers extends The ________ data structure uses the "Last in, First Out" principle. - Answers Stack Which of the following operations does Queue support? (enter answer as x, y, z) a) push b) pop c) add() d) poll() e) insert() f) remove() g) addFirst() h) removeLast() - Answers c, d If there is a Queue and 5 is added, 10 is added, 15 is added, then poll() is used. What is the printed output? - Answers 10 A PriorityQueue "pq" is made with the student names and the following grades: Alice - 90, Bob - 85, and Charlie - 95. It's returned through a toString in another class with the format: return name + ":" + grade;. What is displayed when using Sln(()); - Answers Charlie:95, Alice:90, Bob:85 What is the output of a Stack is given: push("A"); push("B"); push("C"); pop(); push("D"); Sln(()); - Answers D What is the output of a Stack is given: push(10); push(20); push(30); Sln(()); - Answers 30 An Animal class is given the print statement: "Animal makes a sound". A Dog cla