What will this line of code do replace(i,j);

what is the output for the following program?

First round: these questions are incomplete, I am writing only the main logic here. 1) public static int x=5; psvm() { ClassName obj1 = new ClassName() ; obj1.x=7; ClassName obj2 = new ClassName() ; obj2.x=9; Sop(x);// write the output of the program. No mcq, you have to figure out the output. 2) boolean b = false; if(b=true) { Sop("Hello") ; } //it was a question of this kind. Practice on if condition, 3) public class A { protected void message() { Sop("parent") ; } psvm() { B b= new B() ; b.message(); } } class B{ public void message() { Sop("derived") ; } } 4) public static void main(String[] args) { final StringBuffer a = new StringBuffer(); final StringBuffer b = new StringBuffer(); new Thread() { public void run() { System.out.print(a.append("A")); synchronized (b) { System.out.print(b.append("B")); } } }.start(); new Thread() { public void run() { System.out.print(b.append("C")); synchronized (a) { System.out.print(a.append("D")); } } }.start(); } // use break points to understand this program flow. 5) below program is about anonymous class public class any{ Psvm() { System.out.println(new inter1() { public void returnString() { System.out.println("inside anonymous class's method"); } }); } } interface inter1{ } 6) psvm() { String s1 = "Hello" ; String s2 = s1; s1 += "there" ; Sop(s1+"" +s2+"" +(s1==s2)) ; } 7) one question on increment and decrement. I don't remember it exactly but similar to this one: int value =20; int total = - - value; Sop(++value + total++ +value++ + - - value) ; 8) a question on joining threads inside the main method (again not exact but similar) : psvm() throws InterruptedException{ new Thread() { public void run() { Sop("Hello") ; } th.join(); }.start(); } 9) psvm() { try{ int x=5/0; } catch(Exception e) { Sop(e) ; } catch(ArithmeticException e1) { Sop(e1) ; } } 10) two questions on sql: 1) print 3 minimum salary from a table. //just use LIMIT 3 and ORDER BY salary ASC; 2) two inter linked tables are given. Retrieve all the details also where the employees are Managers.(i don't remember it exactly but very similar 5o this one). 11) There were 10 or 12 aptitude questions on: 1) train (speed, length of the pole...) 2) work 3) probability (dice) 4) percentage( if 40% of the amount is 200 then what is 60% of that amount) - - - - > again I don't remember the numbers here but this is almost the exact except the numbers I mentioned here.