JAVA Interfaces and Abstract Classes Which of the following is a correct interface? abstract interface A { abstract void print(); { }} interface A { void print() { } } abstract interface A { print(); } interface A { void print(); } abstract interface A { abstract void print(); { }} interface A { void print() { } } abstract interface A { print(); } interface A { void print(); } ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes What will happen after compiling this program code?abstract class MyClass{ //line 1 private int a, b; public void call(int a, int b){ this.a = a; this.b = b; System.out.print(a+b); }}public class Test{ public static void main(String args[]){ MyClass m = new MyClass(); //line 2 m.call(12,25); }} Compilation error due to line 2 Successful run and print 37 None of these Runtime error Compilation error due to line 1 Compilation error due to line 2 Successful run and print 37 None of these Runtime error Compilation error due to line 1 ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which of the following statements regarding abstract classes are true? A subclass can override a concrete method in a superclass to declare it abstract. An abstract class can be extended. An abstract class can be used as a data type. All of these A subclass of a non-abstract superclass can be abstract. A subclass can override a concrete method in a superclass to declare it abstract. An abstract class can be extended. An abstract class can be used as a data type. All of these A subclass of a non-abstract superclass can be abstract. ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which of the following declares an abstract method in an abstract Java class? public void method() {} public abstract void method(); public abstract method(); public void abstract Method(); public abstract void method() {} public void method() {} public abstract void method(); public abstract method(); public void abstract Method(); public abstract void method() {} ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes In Java, declaring a class abstract is useful When it makes sense to have objects of that class. When it doesn't make sense to have objects of that class. To force developers to extend the class not to use its capabilities. To prevent developers from further extending the class. When default implementations of some methods are not desirable. When it makes sense to have objects of that class. When it doesn't make sense to have objects of that class. To force developers to extend the class not to use its capabilities. To prevent developers from further extending the class. When default implementations of some methods are not desirable. ANSWER DOWNLOAD EXAMIANS APP
JAVA Interfaces and Abstract Classes Which of the following class definitions defines a legal abstract class? class A { abstract void unfinished() { } } public class abstract A { abstract void unfinished(); } abstract class A { abstract void unfinished(); } class A { abstract void unfinished(); } class A { abstract void unfinished() { } } public class abstract A { abstract void unfinished(); } abstract class A { abstract void unfinished(); } class A { abstract void unfinished(); } ANSWER DOWNLOAD EXAMIANS APP
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