Q64
In the following Java code, which code fragment should be inserted at line 3 so that the output will be: "123abc 123abc"? 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");
AnswerAnswer: Option D
Solution
Answer: Option D
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