JAVA认证

Question: 4

Given the following definition:

String s = story;

Which of the following expressions are legal?

A. s += books;

B. char c = s[1];

C. int len = s.length;

D. String t = s.toLowerCase();

Explanation:

Answer B is not correct for String is a class and can'T be treated as an array of char. Answer C is not correct for s.length() should be used, not s.length.

Correct Answer: A,D 4 of 60

Question: 5

What is the return value of the main() method in Java?

A. String

B. int

C. char

D. void

Explanation:

The main() method in Java returns void.

Correct Answer: D 5 of 60

编辑推荐：

JAVA认证考试报考指南 / 更多JAVA考试模拟试题

（责任编辑：）

共2页,当前第1页  第一页  前一页  下一页