OCP-1Z0-051-2015-28题

QUESTION NO: 28
Which two statements are true regarding working with dates? (Choose two.)日期格式
A. The default internal storage of dates is in the numeric format
B. The RR date format automatically calculates the century from the SYSDATE function but allows the user to enter the century if required
C. The default internal storage of dates is in the character format
D. The RR date format automatically calculates the century from the SYSDATE function and does not allow the user to enter the century

Answer: A,B

Explanation:默认内部日期的存储形式是数字形式不是字符类型,所有A对，C错

RR日期格式自动从SYSDATE函数中计算出世纪，但是如果需要还允许用户输入世纪,所有B错，D对。