In which area of memory, the system stores parameters and local variables whenever a method is invoked? Storage Area Heap Stack Array TRUE ANSWER : ? YOUR ANSWER : ?
What is the expected output?public class Profile { private Profile(int w) { // line 1 System.out.print(w); } public static Profile() { // line 5 System.out.print (10); } public static void main(String args[]) { Profile obj = new Profile(50); }} 10 50 Won't compile because of line (1), constructor can't be private 50 Won't compile because of line (5), constructor can't be static TRUE ANSWER : ? YOUR ANSWER : ?
The implicit return type of a constructor is There is no return type. None of these A class object in which it is defined. void TRUE ANSWER : ? YOUR ANSWER : ?
class A{ A(String s){} A(){}}1. class B extends A{2. B(){}3. B(String s){4. super(s);5. }6. void test(){7. // insert code here8. }9. }Which of the below code can be insert at line 7 to make clean compilation ? All of these None of these A a = new B(); A a = new B(5); A a = new A(String s); TRUE ANSWER : ? YOUR ANSWER : ?
The following code contains one compilation error, find it?public class Test {Test() { } // line 1static void Test() { this(); } // line 2 public static void main(String[] args) { // line 3Test(); // line 4}} At line 1, constructor Tester must be marked public like its class At line 2, constructor call At line 3, compilation error, ambiguity problem, compiler can't determine whether a constructor At line 4 TRUE ANSWER : ? YOUR ANSWER : ?
What is the output for the below code ?class A{ public A(){ System.out.println("A"); } public A(int i){ this(); System.out.println(i); }}class B extends A{ public B(){ System.out.println("B"); } public B(int i){ this(); System.out.println(i+3); }}public class Test{ public static void main (String[] args){ new B(5); }} B 8 A 5 A 5 B 8 A B 5 A B 8 None of these TRUE ANSWER : ? YOUR ANSWER : ?
class MyClass{ MyClass(){ System.out.print("one"); } public void myMethod(){ this(); System.out.print("two"); }} public class TestClass{ public static void main(String args[]){ MyClass obj = new MyClass(); obj.myMethod(); }} None of these one Exception two one one Compilation Error one one two TRUE ANSWER : ? YOUR ANSWER : ?
The main method should be static for the reason None of these It can be executed without creating any instance of the class. It can be accessed easily by the class loader. It can be accessed by every method or variable without any hindrance. TRUE ANSWER : ? YOUR ANSWER : ?
The variables declared in a class for the use of all methods of the class are called objects reference variables None of these instance variables TRUE ANSWER : ? YOUR ANSWER : ?