Java OCA OCP Practice Question 214

Question

Given: 

public class Main {
  public static void main(String[] args) {
    String s = "JAVA";
    s = s + "rocks";
    s = s.substring(4,8);
    s.toUpperCase();
    System.out.println(s);
  }
}

What is the result? 

A.   JAVA
B.   JAVAROCKS
C.   rocks
D.   rock
E.   ROCKS
F.   ROCK
G.   Compilation fails



D is correct.

Note

The substring() invocation uses a zero-based index and the second argument is exclusive, so the character at index 8 is NOT included.

The toUpperCase() invocation makes a new String object that is instantly lost.

The toUpperCase() invocation does NOT affect the String referred to by s.

A, B, C, E, F, and G are incorrect based on the above.




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