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Java.lang Class - Programming

Q1:

What will be the output of the program? 
String x = new String('xyz');
String y = 'abc';
x = x + y;
How many String objects have been created?

A 2

B 3

C 4

D 5

ANS:A - 2

Line 1 creates two, one referred to by x and the lost String 'xyz'. Line 2 creates one (for a total of three). Line 3 creates one more (for a total of four), the concatenated String referred to by x with a value of 'xyzabc'.