JAVA Interfaces and Abstract Classes Which of the following declares an abstract method in an abstract Java class? public void abstract Method(); public void method() {} public abstract void method() {} public abstract method(); public abstract void method(); public void abstract Method(); public void method() {} public abstract void method() {} public abstract method(); public abstract void method(); ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes What happens if the following program is compiled and executed?interface MyInterface{ void display();}interface MySubInterface extends MyInterface{ void display();}public class Test implements MySubInterface{ public void display(){ System.out.print("Welcome to Examveda."); } public static void main(String args[]){ Test t = new Test(); t.display(); }} The code will lead to a compilation error as the display method is not declared as abstract. The code will lead to a compilation error as declaration of the display method has been provided in two interface. The code will lead to a compilation error due to public modifier while declaring the display method. None of these The code will compile and execute successfully showing the output Welcome to Examians. The code will lead to a compilation error as the display method is not declared as abstract. The code will lead to a compilation error as declaration of the display method has been provided in two interface. The code will lead to a compilation error due to public modifier while declaring the display method. None of these The code will compile and execute successfully showing the output Welcome to Examians. ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Given the following piece of code:public class School{ public abstract double numberOfStudent();}which of the following statements is true? Class School must be defined abstract. The method numberOfStudent() in class School must have a body. The keywords public and abstract cannot be used together. You must add a return statement in method numberOfStudent(). Class School must be defined abstract. The method numberOfStudent() in class School must have a body. The keywords public and abstract cannot be used together. You must add a return statement in method numberOfStudent(). ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which two of the following are legal declarations for abstract classes and interfaces?1. final abstract class Test {}2. public static interface Test {}3. final public class Test {}4. protected abstract class Test {}5. protected interface Test {}6. abstract public class Test {} 3 and 5 5 and 6 1 and 2 3 and 6 2 and 4 3 and 5 5 and 6 1 and 2 3 and 6 2 and 4 ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes In Java, declaring a class abstract is useful When default implementations of some methods are not desirable. To force developers to extend the class not to use its capabilities. To prevent developers from further extending the class. When it makes sense to have objects of that class. When it doesn't make sense to have objects of that class. When default implementations of some methods are not desirable. To force developers to extend the class not to use its capabilities. To prevent developers from further extending the class. When it makes sense to have objects of that class. When it doesn't make sense to have objects of that class. ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes What will be the output?interface A{public void method();}class One{public void method(){System.out.println("Class One method");}}class Two extends One implements A{public void method(){System.out.println("Class Two method");}}public class Test extends Two{public static void main(String[] args){A a = new Two();a.method();}} Compilation Error will print Class One method None of these compiles fine but print nothing will print Class Two method Compilation Error will print Class One method None of these compiles fine but print nothing will print Class Two method ANSWER DOWNLOAD EXAMIANS APP
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