Java基础知识面试题数组和字符串相关的选择题

1. 下面数组定义正确的有：（ ）
A String strs[] = { ‘a’ ‘b’ ‘c’};
B String[] strs = {“a”, “b”, “c”};
C String[] strs = new String{“a” “b” “c”};
D String strs[] = new String[]{“a”, “b”, “c”};
E String[] strs = new String[3]{“a”, “b”, “c”};

2. 以下选项中合法的字符常量是：（ ）
A “B”
B ‘10’
C 68 
D D

3. 在下列代码中，对象b最早在以下哪个选项前被垃圾回收？（ ）
public class Q76a9 {
static String f() {
String a = “hello”;
String b = “bye”;
String c = b + “!”; // line A
String d = b;
b = a; // line B
d = a; // line C
return c; // line D
}
public static void main(String args[]) {
String msg = f(); System.out.println(msg);
}
}
A line A
B line B
C line C
D line D