Smash the code

When a method in a subclass overrides a method in superclass, it is still possible to call the overridden method using   super   keyword. If you write   super.func()   to call the function   func() , it will call the method that was defined in the superclass. You are given a partially completed code in the editor. Modify the code so that the code prints the following text: Hello I am a motorcycle, I am a cycle with an engine. My ancestor is a cycle who is a vehicle with pedals. SOLUTION : - import java.io.*; import java.util.*; class Cycle {     String define_me() {         return "a vehicle with pedals." ;     } } class Motorcycle extends Cycle {     @Override     String define_me() {         return "a cycle with an engine." ;     }     Motorcycle() {         System.out.println( "Hello I am a motorcycle, I am " + define_me());   ...

Query the   Name   of any student in   STUDENTS   who scored higher than    75  Marks . Order your output by the   last three characters   of each name. If two or more students both have names ending in the same last three characters (i.e.: Bobby, Robby, etc.), secondary sort them by ascending   ID . Input Format The  STUDENTS  table is described as follows:   The  Name  column only contains uppercase ( A - Z ) and lowercase ( a - z ) letters. Sample Input Sample Output Ashley Julia Belvet Solution : SELECT Name FROM STUDENTS WHERE Marks > 75 ORDER BY SUBSTR(Name, -3) ASC, ID ASC;

  A Java interface can only contain method signatures and fields. The interface can be used to achieve polymorphism. In this problem, you will practice your knowledge on interfaces. You are given an interface  AdvancedArithmetic  which contains a method signature  int divisor_sum(int n) . You need to write a class called MyCalculator which implements the interface. divisorSum  function just takes an integer as input and return the sum of all its divisors. For example divisors of 6 are 1, 2, 3 and 6, so  divisor_sum  should return 12. The value of n will be at most 1000. Read the partially completed code in the editor and complete it. You just need to write the MyCalculator class only.  Your class shouldn't be public. Sample Input 6 Sample Output I implemented: AdvancedArithmetic 12 Explanation Divisors of 6 are 1,2,3 and 6. 1+2+3+6=12. Solution : - import java.io.*; import java.util.*; interface AdvancedArithmatic{     int divisor_su...

A Java abstract class is a class that can't be instantiated. That means you cannot create new instances of an abstract class. It works as a base for subclasses. You should learn about Java Inheritance before attempting this challenge. Following is an example of abstract class: abstract class Book { String title ; abstract void setTitle ( String s ); String getTitle (){ return title ; } } If you try to create an instance of this class like the following line you will get an error: Book new_novel = new Book (); You have to create another class that extends the abstract class. Then you can create an instance of the new class. Notice that  setTitle  method is abstract too and has no body. That means you must implement the body of that method in the child class. In the editor, we have provided the abstract  Book  class and a  Main  class. In the Main class, we created an instance of a class called  MyBook . Your ta...

  Using   inheritance , one class can acquire the properties of others. Consider the following   Animal   class: class Animal { void walk (){ System . out . println ( "I am walking" ); } } This class has only one method,  walk . Next, we want to create a  Bird  class that also has a  fly  method. We do this using  extends  keyword: class Bird extends Animal { void fly () { System . out . println ( "I am flying" ); } } Finally, we can create a Bird object that can both  fly  and  walk . public class Solution { public static void main ( String [] args ){ Bird bird = new Bird (); bird . walk (); bird . fly (); } } The above code will print: I am walking I am flying This means that a Bird object has all the properties that an Animal object has, as well as some additional unique properties. The code above is provided for you in your...