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 (III) (I) and (II) Only (I) Only (II) (II) and (III) Only (III) (I) and (II) Only (I) Only (II) (II) and (III) 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(); }} a c b a a b c c The code runs without output.. a c b a a b c c The code runs without output.. 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 2 and 4 1 and 2 3 and 5 2 and 5 3 and 4 2 and 4 1 and 2 3 and 5 2 and 5 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(); }} 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. "vehiclecar" is printed. ANSWER DOWNLOAD EXAMIANS APP
JAVA Inheritence What is the result of compiling and running this program?class Mammal{ void eat(Mammal m){ System.out.println("Mammal eats food"); }}class Cattle extends Mammal{ void eat(Cattle c){ System.out.println("Cattle eats hay"); }}class Horse extends Cattle{ void eat(Horse h){ System.out.println("Horse eats hay"); }}public class Test{ public static void main(String[] args){ Mammal h = new Horse(); Cattle c = new Horse(); c.eat(h); }} prints "Cattle eats hay" prints "Horse eats hay" prints "Mammal eats food" None of these Class cast Exception at runtime. prints "Cattle eats hay" prints "Horse eats hay" prints "Mammal eats food" None of these Class cast Exception at runtime. 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); }} None of these hello (String, Integer[]) Overridden: hello (String, Integer[]) Compilation fails None of these hello (String, Integer[]) Overridden: hello (String, Integer[]) Compilation fails ANSWER DOWNLOAD EXAMIANS APP
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