JAVA认证

Explanation:

The length of the short data is 16 bits. The range of short is

The length of the short data is 16 bits. The range of short is

Correct Answer: D 9 of 60

Question: 10

Which one of the following ranges of byte is correct?

Correct Answer: B 10 of 60

Question: 11

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Given the following fragment of code, what are results of i and j after execution?

int i = 1;

int j;

j = i++;

A. 1, 1

B. 1, 2

C. 2, 1

D. 2, 2

Explanation:

Pay attention to the position of the operator ++. In this question, first j is assigned to 1, then the value of i is added to 2.

Correct Answer: C 11 of 60

Question: 12

Which of the following statements are true?

A. >> is the arithmetic right shift operator.

B. >> is the logical right shift operator.

C. >>> is the arithmetic right shift operator.

D. >>> is the logical right shift operator.

Explanation:

There are two right shift operators in Java. They are >> and >>>. >> is the arithmetic(signed) right shift operator and >>> is the logical(unsigned) right shift operator.

Correct Answer: A,D 12 of 60

Question: 13

Which of the following assignments are legal?

A. float a = 2.0

B. double b = 2.0

C. int c = 2

D. long d = 2

Explanation:

In Java the default data type of floating point is double, not float. The assignment from double to float requires an explicit cast.

Correct Answer: B,C,D 13 of 60

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