What will be the result after compiling this code?class SuperClass{ public int doIt(String str, Integer... data)throws Exception{ String signature = "(String, Integer[])"; System.out.println(str + " " + signature); return 1; }}public class Test extends SuperClass{ public int doIt(String str, Integer... data){ String signature = "(String, Integer[])"; System.out.println("Overridden: " + str + " " +signature); return 0; } public static void main(String... args){ SuperClass sb = new Test(); sb.doIt("hello", 3); }}

JAVA Inheritence
What will be the result after compiling this code?class SuperClass{ public int doIt(String str, Integer... data)throws Exception{ String signature = "(String, Integer[])"; System.out.println(str + " " + signature); return 1; }}public class Test extends SuperClass{ public int doIt(String str, Integer... data){ String signature = "(String, Integer[])"; System.out.println("Overridden: " + str + " " +signature); return 0; } public static void main(String... args){ SuperClass sb = new Test(); sb.doIt("hello", 3); }}

Overridden: hello (String, Integer[])

Compilation fails

hello (String, Integer[])

None of these

Overridden: hello (String, Integer[])

Compilation fails

hello (String, Integer[])

None of these

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JAVA Inheritence
Determine output:class Small{ public Small(){ System.out.print("a "); }}class Small2 extends Small{ public Small2(){ System.out.print("b "); }}class Small3 extends Small2{ public Small3(){ System.out.print("c "); }}public class Test{ public static void main(String args[]){ new Small3(); }}

a

c

c b a

The code runs without output..

a b c

a

c

c b a

The code runs without output..

a b c

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JAVA Inheritence
What is the output of the following program code?abstract class C1{public C1(){ System.out.print(1); } } class C2 extends C1{ public C2(){ System.out.print(2); } } class C3 extends C2{ public C3(){ System.out.println(3); } } public class Test{ public static void main(String[] a){ new C3(); } }

321

12

123

23

321

12

123

23

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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(); }}

Compilation fails.

"vehiclebike" is printed.

"vehiclecar" is printed.

"carcar" is printed.

ClassCastException exception is thrown at runtime.

Compilation fails.

"vehiclebike" is printed.

"vehiclecar" is printed.

"carcar" is printed.

ClassCastException exception is thrown at runtime.

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JAVA Inheritence
Which is true?

"X extends Y" is correct for all combinations of X and Y being classes and/or interfaces

"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 an interface and Y is a class

"X extends Y" is correct if and only if X is a class and Y is an interface

"X extends Y" is correct for all combinations of X and Y being classes and/or interfaces

"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 an interface and Y is a class

"X extends Y" is correct if and only if X is a class and Y is an interface

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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(); }}

JAVA Inheritence

JAVA Inheritence Which is true?

JAVA Inheritence
Which is true?