JAVA Inheritence
Which of the following is true?1. A class can extend more than one class.2. A class can extend only one class but many interfaces.3. An interface can extend many interfaces.4. An interface can implement many interfaces.5. A class can extend one class and implement many interfaces.

2 and 4
1 and 2
3 and 5
2 and 5
3 and 4

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JAVA Inheritence
What will be the result of compiling and executing the following program code?class Vehicle{ public void printSound(){ System.out.print("vehicle"); }}class Car extends Vehicle{ public void printSound(){ System.out.print("car"); }}class Bike extends Vehicle{ public void printSound(){ System.out.print("bike"); }}public class Test{ public static void main(String[] args){ Vehicle v = new Car(); Bike b = (Bike) v; v.printSound(); b.printSound(); }}

"carcar" is printed.
"vehiclebike" is printed.
"vehiclecar" is printed.
ClassCastException exception is thrown at runtime.
Compilation fails.

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JAVA Inheritence
What will be the output?class Parent{ public void method(){ System.out.println("Hi i am parent"); }}public class Child extends Parent{ protected void method(){ System.out.println("Hi i am Child"); } public static void main(String args[]){ Child child = new Child(); child.method(); }}

Compile time error
Compiles successfully and print
Run Time error
Compiles successfully and print
None of This

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JAVA Inheritence
Which is true?

"X extends Y" is correct if X and Y are either both classes or both interfaces
"X extends Y" is correct if and only if X is a class and Y is an interface
"X extends Y" is correct if and only if X is an interface and Y is a class
"X extends Y" is correct for all combinations of X and Y being classes and/or interfaces

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JAVA Inheritence
Determine output:class A{ public void printName(){ System.out.println("Name-A"); }}class B extends A{ public void printName(){ System.out.println("Name-B"); }}class C extends A{ public void printName(){ System.out.println("Name-C"); }}1. public class Test{2. public static void main (String[] args){3. B b = new B();4. C c = new C();5. b = c;6. newPrint(b);7. }8. public static void newPrint(A a){9. a.printName();10. }11. }

None of these
Name B
Compilation fails due to an error on lines 9
Compilation fails due to an error on lines 5
Name C

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