Java:Tricky Coding Interview Questions:

Java:Tricky Coding Interview Questions
1.What is the output?

public class Trk1 {
 public static void main(String args[])
 {
   int i=5;
        switch(i)
        {
       
        case 1:
         System.out.println("1");
        case 2:
         System.out.println("2");
        default:
         System.out.println("default");
        case 3:
         System.out.println("3");
       
        }
 }
}

Output:

default

3

2.What is the value of i and j?

public class Trk2 {
 public static void main(String args[])
 {
        for(int i=0;i<2;i++) 
   for(int j=2;j>=0;j--)
   {
    if(i==j) break;
          System.out.println("i="+i+"j="+j);
   }
 }
}

Output:

i=0j=2

i=0j=1
i=1j=2

3.What is the output?

public class Trk3 {
 public static void main(String args[])
 {
    String s1 = new String("Happy");
  String s2 = s1.replace('n', 'i');
  s1.concat("Birthday");
        System.out.println(s1);
        System.out.println((s1+s2).charAt(5));
 }
}


Output:

Happy

H

4.What is the output?

public class Trk4 {
 public static void main(String args[])
 {
     int anar[]= new int[5];
         System.out.println(anar[0]);
 }
}

Output:
0