JAVA Inheritence The concept of multiple inheritance is implemented in Java byI. Extending two or more classes.II. Extending one class and implementing one or more interfaces.III. Implementing two or more interfaces. Only (II) Only (III) Only (I) (II) and (III) (I) and (II) Only (II) Only (III) Only (I) (II) and (III) (I) and (II) ANSWER DOWNLOAD EXAMIANS APP
JAVA Inheritence Determine output:class A{public void method1(){System.out.print("Class A method1");}}class B extends A{public void method2(){System.out.print("Class B method2");}}class C extends B{public void method2(){System.out.print("Class C method2");}public void method3(){System.out.print("Class C method3");}}public class Test{public static void main(String args[]){A a = new A();C c = new C();c.method2();a = c;a.method3();}} Compilation Error None of these Runtime exception Class C method2 Class C method3 Class B method2 Class C method3 Compilation Error None of these Runtime exception Class C method2 Class C method3 Class B method2 Class C method3 ANSWER DOWNLOAD EXAMIANS APP
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(); }} c b a The code runs without output.. a b c a c c b a The code runs without output.. a b c a c ANSWER DOWNLOAD EXAMIANS APP
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 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 if X and Y are either both classes or both interfaces "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 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 if X and Y are either both classes or both interfaces 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); }} Compilation fails None of these Overridden: hello (String, Integer[]) hello (String, Integer[]) Compilation fails None of these Overridden: hello (String, Integer[]) hello (String, Integer[]) ANSWER DOWNLOAD EXAMIANS APP
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(); }} "vehiclecar" is printed. ClassCastException exception is thrown at runtime. "vehiclebike" is printed. "carcar" is printed. Compilation fails. "vehiclecar" is printed. ClassCastException exception is thrown at runtime. "vehiclebike" is printed. "carcar" is printed. Compilation fails. ANSWER DOWNLOAD EXAMIANS APP
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