oops added

OOPSQuestions.java

@@ -0,0 +1,52 @@
+class BaseClass{
+    int x = 10;
+    BaseClass(){
+        System.out.println("Base Class Constructor");
+    }
+}
+
+class DerivedClass extends BaseClass{
+    int x = 20;
+    DerivedClass(){
+        System.out.println("Derived Class Constructor");
+    }
+
+    public void callSuper(){
+        System.out.println(super.x); // refers to the base class's x
+    }
+}
+
+class BaseClass2{
+    BaseClass2(int x){
+        System.out.println("Base Class Constructor");
+    }
+}
+
+class DerivedClass2{
+    DerivedClass2(){
+        //super(10);
+        System.out.println("Derived Class Constructor");
+    }
+}
+
+
+class Questions{
+    public void Q1(){
+        DerivedClass derivedClass = new DerivedClass(); // the base class constructor will also be called.
+
+        derivedClass.callSuper();
+    }
+
+    public void Q2(){
+        DerivedClass2 derivedClass = new DerivedClass2(); // the base class construct will not be called here because the default constructor is not present in the base class.
+        // we have to call super and pass value to call the constructor of base class.
+    }
+}
+
+public class OOPSQuestions{
+    public static void main(String[] args){
+        Questions questions=new Questions();
+
+        questions.Q2();
+    }
+}