JAVA Interfaces and Abstract Classes Which of the following statements regarding abstract classes are true? A subclass of a non-abstract superclass can be abstract. An abstract class can be used as a data type. An abstract class can be extended. A subclass can override a concrete method in a superclass to declare it abstract. All of these A subclass of a non-abstract superclass can be abstract. An abstract class can be used as a data type. An abstract class can be extended. A subclass can override a concrete method in a superclass to declare it abstract. All of these 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 6 3 and 5 1 and 2 2 and 4 5 and 6 3 and 6 3 and 5 1 and 2 2 and 4 5 and 6 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();}} None of these will print Class Two method Compilation Error compiles fine but print nothing will print Class One method None of these will print Class Two method Compilation Error compiles fine but print nothing will print Class One method 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? 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(). Class School must be defined abstract. The method numberOfStudent() in class School must have a body. ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which of the following is a correct interface? abstract interface A { abstract void print(); { }} abstract interface A { print(); } interface A { void print() { } } interface A { void print(); } abstract interface A { abstract void print(); { }} abstract interface A { print(); } interface A { void print() { } } interface A { void print(); } ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which of the following declares an abstract method in an abstract Java class? public void abstract Method(); public abstract void method(); public abstract void method() {} public abstract method(); public void method() {} public void abstract Method(); public abstract void method(); public abstract void method() {} public abstract method(); public void method() {} ANSWER DOWNLOAD EXAMIANS APP