Given: What is the result? （）
A、 three

B、 other

C、 An exception is thrown at runtime.

D、 Compilation fails because of an error on line 12.

E、 Compilation fails because of an error on line 13.

F、 Compilation fails because of an error on line 15.

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Matthew has recently joined NetFx Corporation as a junior-level Database Administrator （DBA）. He is asked by his supervisor to verify the database for data block corruptions. He uses the DBVERIFY utility and finds that two data blocks are corrupted in the database. What should Matthew use to identify the corrupted blocks as well as datafiles containing these blocks？（）

A、 datafile

B、 alert log

C、 dynamic views

D、 control file script

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在堆栈类SharedStack的定义中，为了保证堆栈在并发操作中数据的正确性，应在下划线处填入的修饰符是（　　）。（两个下划线的填写内容相同）public class SharedStack { ______ int idx = 0; ______ char[] data = new char[10]; public synchronized void push(char c){……} public synchronized void pop(){……}}

A、public

B、不使用修饰符

C、private

D、protected

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要打开一个视图以便浏览或更新其中的数据，可以使用命令（　　）。

A、USE

B、USEVIEW

C、BROWSE

D、BROWSEVIEW

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执行查询文件myquery.qpr的命令是（　　）。