JAVA Constructors and Methods
What is the output of the program?class Test{ public int display(int x, int y){ return ("The sum of x and y is " + x + y); } public static void main(String args[]){ Test test = new Test(); System.out.println(test.display(4,5)); } }

The sum of x and y is 45
None of these
does not compile
The sum of x and y is 9

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JAVA Constructors and Methods
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 2, constructor call
At line 3, compilation error, ambiguity problem, compiler can't determine whether a constructor
At line 4
At line 1, constructor Tester must be marked public like its class

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