Question
1 StringBuilder sb1 = new StringBuilder("123");
2 String s1 = "123";
3 // insert code here
4 System.out.println(sb1 + " " + s1);a.
sb1.append(“abc”); s1.append(“abc”);
b.
sb1.append(“abc”); s1.concat(“abc”);
c.
sb1.concat(“abc”); s1.append(“abc”);
d.
sb1.append(“abc”); s1 = s1.concat(“abc”);
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Q. In the below code, which code fragment should be inserted at line 3 so that the output will be: “123abc 123abc”?
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