JAVA Inheritence Which is true? "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 "X extends Y" is correct if and only if X is a class and Y is an interface "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 for all combinations of X and Y being classes and/or 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 X and Y are either both classes or both interfaces ANSWER DOWNLOAD EXAMIANS APP
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(); } } 123 23 12 321 123 23 12 321 ANSWER DOWNLOAD EXAMIANS APP
JAVA Inheritence What will be the output?class One{ final int a = 15;}class Two extends One{ final int a = 20;}public class Test extends Two{ final int a = 30; public static void main(String args[]){ Test t = new One(); System.out.print(t.a); }} 15 None of these 30 20 Compiler Error 15 None of these 30 20 Compiler Error ANSWER DOWNLOAD EXAMIANS APP
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); }} hello (String, Integer[]) Compilation fails Overridden: hello (String, Integer[]) None of these hello (String, Integer[]) Compilation fails Overridden: hello (String, Integer[]) None of these ANSWER DOWNLOAD EXAMIANS APP
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. 3 and 4 3 and 5 2 and 4 2 and 5 1 and 2 3 and 4 3 and 5 2 and 4 2 and 5 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
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. } Compilation fails due to an error on lines 5 Name B Name C Compilation fails due to an error on lines 9 None of these Compilation fails due to an error on lines 5 Name B Name C Compilation fails due to an error on lines 9 None of these ANSWER DOWNLOAD EXAMIANS APP
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