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This set of Object Oriented Programming (OOPs) Multiple Choice Questions & Answers (MCQs) focuses on “Abstract Class”. void deposit() { // Line 4 C. List B. Compilation error will occur because ""abstract class must have an abstract method"" 1. 5. B. An abstract class is a class that is designed to be specifically used as a base class. private String bankName; View Answer. It needs to be extended and its method implemented. a) java.lang d) Compilation Error c) Static class Instance of Abstract class does not have any real meaning and it is not allowed. These Multiple Choice Questions (MCQ) should be practiced to improve the Java programming skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations. c) Runtime Error C. Compilation error will occur while invoking the super class constructor An abstract class is a class that is designed to be specifically used as a base class. // TODO Auto-generated method stub A. There are two ways to achieve abstraction in java. It is a collection of the abstract methods. D. can not say. 8. b) 3 3 Explanation: The syntax of abstract class in java is abstract class A{}. a) Thread C. An abstract method is one without a body that is declared with the reserved word abstract. Bank(String bankName) Abstract class can’t be instantiated. What will be output for the folllowing code? Abstraction is an important concept of object-oriented programming that allows us to hide unnecessary details and only show the needed information. A pure virtual function can be declared by using a pure specifier ( = 0 ) in the declaration of a virtual member function in the class declaration. Java MCQ Questions – Java Multiple Choice Questions with answers for preparation of IT exams of various regular and distance mode courses. Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Which of these keywords are used to define an abstract class? AWT & Swing in Java objective type questions with answers and explanation (MCQs) for interview and placement tests. 5. A. b) Abstract class defines only the structure of the class not its implementation This section focuses on the "Abstract class" in Java programming language. 1. public String getBankName() And a constructor of abstract class is called when an instance of a inherited class is created. This section focuses on the "Interfaces" in Java programming. What will be output for the folllowing code? 4. office() { An abstract class contains at least one pure virtual function. Which of these keywords are used to define an abstract class? a) abst b) abstract c) Abstract d) abstract class View Answer A subclass to derive a specific class of same kind b. b) A simple class } Java MCQ (Multiple Choice Questions) with java tutorial, features, history, variables, object, class, programs, operators, swith, for-loop, if-else, ... Abstract methods are always defined inside an abstract class. a) abst Example abstract class. This section of our 1000+ Java MCQs focuses on Abstract class in Java Programming Language. In the above code, MyFirstClass is an abstract class. D) classes and interfaces 4. Contains a lot of questions to practice and to improve your Knowledge skills in Java for exam preparation. : c. An abstract method is one without a body that is declared with the reserved word abstract. Which of these is not abstract? B) inputstream, outputstream 2. b) java.util 5. 3. An abstract class is a class that is declared abstract—it may or may not include abstract methods.Abstract classes cannot be instantiated, but they can be subclassed. An abstract class is used as – a. For example, the following is a valid Java program. MCQs of Abstract Window Toolkit (AWT) Next . D) Static methods may be declared abstract. Study and learn Interview MCQ Questions and Answers on Java Classes and Objects. An abstract class can have parametrized constructors and default constructor is always present in an abstract class. Java provides a mechanism for partitioning the class namespace into more manageable chunks. Practice these MCQ questions and answers for preparation of various competitive and entrance exams. B. abstract class A If a class inheriting an abstract class does not define all of its function then it will be known as? Exception is a class/interface/abstract class/other? c) List View Answer, 4. An abstract method is any method in an abstract class. 10. Explanation: As there is no syntax error, so the code will compile successfully. a) 1 2 7. This is the Java Questions and Answers section on " Inner Classes General Questions " with explanation for various interview, competitive examination and entrance test. D. None of the above. AWT & Swing question bank & quiz comprising … A) an abstract class defined in java.io B) a class we can use to read primitive data types C) an interface that defines methods to open files. 6. Abstract class: is a restricted class … This AWT & Swing in Java online test is useful for beginners, freshers, experienced java developers, lecturers preparing for GATE, job interview, university, semester exams, certification etc. D. An abstract class can be used as a data type. Explanation: Thread is not an abstract class. TRUE A Graphics object encapsulates state information needed for the basic rendering operations that Java supports. A) An abstract class cannot be instantiated. In order to create an Abstract class, you should create at least one member function as a pure virtual function. View Answer, 5. An abstract class can give complete, default code which should be overridden. C. extends Join our social networks below and stay updated with latest contests, videos, internships and jobs! What will be the output of the following Java code? Example abstract class. 1. Which among the following best describes abstract classes? B. Compilation error in Line 2(abstract class cannot have concrete method) Abstract Classes and Methods. D) an interface that defines methods to read primitive data types. 2 and 4 C. 3 and 5 D. 3 and 6 View Answer a. A. B. java.util A subclass to derive a specific class of same kind b. Sanfoundry Global Education & Learning Series – Java Programming Language. Here are the collections of MCQ on inheritance, package & interface in java includes multiple-choice questions on defining inheritance, packages and interfaces. abstract class Bank { 9) State TRUE or FALSE. The members of the Green Project were ____, ____ and ____. This section focuses on the "Interfaces" in Java programming. D. java.system. You can use an abstract class which contains access modifiers. B. util B. View Answer. C. Abstract List a. C. A subclass can override a concrete method in a superclass to declare it abstract. D. An abstract method is a method in the child class that overrids a … : b. C. abstract class A{} 2 and 4 C. 3 and 5 D. 3 and 6 View Answer C) A subclass of an abstract class must define the abstract methods. A. abstract super("Axis Bank"); B) Constructors can be abstract. d) abstract class B. Abstract class defines only the structure of the class not its implementation An abstract method is a method which cannot be inherited. It is a collection of the abstract methods. c) Abstract abstract class Bank Multiple choice questions on Java Programming topic Inheritance. a) java.lang.class b) java.class.inherited c) java.class.object d) java.lang.Object. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. a) 0 }, A. Compilation error will occur because ""abstract class cannot have constructor"" 8. An abstract method is a method which cannot be inherited. E. All of the above An abstract class can have a data member, abstract method, method body (non-abstract method), constructor, and even main() method. 16. d) None of the mentioned An abstract class can have abstract and non-abstract (concrete) methods and can't be instantiated with inheritance, polymorphism, abstraction, encapsulation, exception handling, multithreading, IO Streams, Networking, String, Regex, Collection, JDBC etc. An abstract method is any method in an abstract class. Which of the following statement is false? It cannot be instantiated. The abstract keyword is a non-access modifier, used for classes and methods: . Java Programming Multiple Choice Questions - Interfaces . If super class and subclass have same variable name, which keyword should be used to use super class? Class b. Interface c. Abstract class d. Other; Exception is found in which package in java; a. java.lang b. java.util ... Collection Java - MCQ set 1 (25 questions, 55 marks) Q1 - Q5, 5 EASY level difficulty questions 1 mark each. A method which is declared as abstract and does not have implementation is known as an _____________? This set of MCQ on java programming includes the collection of multiple-choice questions on the fundamentals of java programming language with answers. D. None of the Mentioned. A base class to derive a specific class of the same kind c. A base class to implement a specific class of the same kind d. None of the above Ans. C. Abstract class can have constructors but can not have static methods. Along with the abstract methods, an interface may also contain constants, default methods, static methods, and nested types. B. b) abstract All classes in Java are inherited from which class? View Answer, 3. a) If a class has more than one virtual function, it’s abstract class b) If a class have only one pure virtual function, it’s abstract class An abstract method is a method that is declared without an implementation (without braces, and followed by a semicolon), like this: Which of these packages contains abstract keyword? The class implements an interface, thereby inheriting the abstract methods of the interface. Java Abstract Class MCQ Questions. Used as a data type superclass can be abstract a specific class of same kind b used... Will learn more about in the sanfoundry Certification contest to get free Certificate of Merit that us... Final class c ) upper d ) Compilation Error questions covering all Computer... Covering all the Computer Science subjects Interfaces in Java programming includes the collection of multiple-choice on! The collection of multiple-choice questions on the `` abstract class a [ ] for partitioning the class namespace into manageable! 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