A Java Interface Defines Which of the Following

Private and protected access modifiers can also be used to declare methods in interface. Using comparator interface- Comparator interface is used to order the objects of a user-defined class.

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Which of the following statements is true.

. The interface that the object implements d. An interface can contain only abstract method. It can only contain one class declaration.

Interfaces and Packages. Private and protected access modifiers can. Which of the following provides single sorting sequence for user-defined objects in collection.

Using the given definition of the Measurable interface. Which of the following statements is false. The Java Comparator interface javautilComparator represents a component that can compare two objects so they can be sorted using sorting functionality in JavaWhen sorting eg a Java List you can pass a Java Comparator to the sorting method.

If you compile a class with errors a class file is created for the class. Quizzes Practice Tests with Answer focuses on Java Interfaces. A variable that stores an object that implements an interface can be declared as which of the following data types.

An interface can contain only abstract method. C The interface compiles successfully. All of the above c.

During which of the following phase does a programmer defines the program. Which of the following is true about methods in an interface in java. A Java interface must contain more than one method.

This list interface is implemented by various classes like ArrayList Vector Stack etc. A and c only. C A Java interface specifies behavior that a class will implement.

An Interface in Java programming language is defined as an abstract type used to specify the behavior of a class. These design patterns provide a way to create objects while hiding the creation logic rather than instantiating objects directly using a. B A Java interface must contain more than one method.

This interface is present in javautil package and contains 2 methods compare Object obj1 Object obj2 and equals Object element. A Java interface specifies behavior that a class will implement. Java Programming Multiple Choice Questions - Interfaces.

Computer Science Engineering Technology Java Programming PROGRAMMIN 511. If you compile a class without errors but with warnings a class file is created. 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 and other competitive examinations.

A Java interface defines a set of methods that are required. It can contain one pulic class declaration and one public interface definition. Which statement about a valid java file is true.

Class and Interface in Java Class in Java. This interface is dedicated to the data of the list type in which we can store all the ordered collection of the objects. The Java Comparator interface is.

B An exception is thrown. Public interface Measurable double getMeasure Consider the following code snippet assuming that BankAccount has a getBalance method and implements the Measurable interface by providing an implementation for the getMeasure method. A A Java interface defines a set of methods that are required.

Which of the following is true about methods in an interface in java. T his collection of Java Multiple Choice Questions and Answers MCQs. A Class can have many objects where each has the attributes and behavior defined by the class itself.

The Comparator is then used to compare the objects in the List during sorting. Using a comparator we can sort the elements based on data members. This is a child interface of the collection interface.

None of the above. All methods in a Java interface must be public. I FileOutputStream ii RandomAccessFile iii DataInput A i.

An interface can contain only abstract method. Both A B. If you compile an interface without errors a class file is created for the interface.

We can define a method in an interface. The keywords public and abstract cannot be used together. There can be only abstract methods in the Java interface not the method body.

Which of the following classes in Javaio package defines a method to delete a file. JDBC is an API Application Programming Interface that helps a programmer to write a Java program to connect to a database retrieve the data from the database and perform various operations on the data in a Java program. A Class can be defined as the collection of objects that have a similar type of properties.

A method that has no implementation is called aan ____ method. A Java interface contains static constants and abstract methods. A Java interface defines a set of methods that are required for the implementing class these can be either implemented by the class or the class can use the default An interface can have instance variables.

The method numberOfStudent in class School must have a body. A Stack B File C String D Vector. It may define at most one public class.

This section focuses on the Interfaces in Java programming. As it is an important topic the questions related to JDBC frequently asked in Java interviews and competitive exams. It must define at least one public class.

Measurable m new BankAccount. None of the above. These include the following.

An interface in Java is a blueprint of a class. For a valid file object reference we can create a new file using the following classes defined in Javaio package. Any subclass of the class that defines the object e.

The class that defines the object b. You must add a return statement in method numberOfStudent. D All methods in a Java interface must be abstract.

Concept of inheritance is used to compose interfaces and define ways to compose objects to obtain new functionalities. D Result body is not fully defined. We can define a method in an interface.

D The class implementing the interface will throw an exception. What happens when a constructor is defined for an interface. This also allows duplicate data to be present in it.

The interface in Java is a mechanism to achieve abstraction. It is a logical entity that can be seen as a blueprint for creating the objects.

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