单项选择题

Which of the following range of short is correct？（）

A. -27 -- 27-1
B. 0 -- 216-1
C. -215 -- 215-1
D. -231 -- 231-1

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多项选择题

The 8859-1 character code for the uppercase letter A is 65. Which of these code fragments declare and initialize a variable of type char with this value？（）

A.char ch = 65；
B.char ch = ’¥65’；
C.char ch = ’¥0041’；
D.char ch = ’A’；
E.char ch = "A"；

多项选择题

Given the following code， which method declarations， when inserted at the indicated position， will not cause the program to fail compilation？（）
public class Qdd1f {
public long sum（long a， long b） {
return a + b；
}
// insert new method declaration here
}

A.public int sum（int a， int b） { return a + b； }
B.public int sum（long a， long b） { return 0； }
C.abstract int sum（）；
D.private long sum（long a， long b） { return a + b； }
E.public long sum（long a， int b） { return a + b； }

多项选择题

Which statements concerning casting and conversion are true？（）

A.Conversion from int to long does not need a cast.
B.Conversion from byte to short does not need a cast.
C.Conversion from float to long does not need a cast.
D.Conversion from short to char does not need a cast.
E.Conversion from boolean to int using a cast is not possible.