When performing an incomplete recovery of the whole database， what must be true about the data files that are restored？（）
A
B
C
D
Given： and two separate command line invocations： java Yippee java Yippee 1 2 3 4 What is the result？（）
A. No output is produced.1 2 3
B. No output is produced.2 3 4
C. No output is produced.1 2 3 4
D. An exception is thrown at runtime.1 2 3
Which three methods， inserted individually at line 14， will correctly complete class Two？（）
A. int foo（）{/* more code here */}
B. void foo（）{/* more code here */}
C. public void foo（）{/* more code here */}
D. private void foo（）{/* more code here */}
E. protected void foo（）{/* more code here */}
Given： What is the result？（）
A. Compilation fails.
B. An exception is thrown at runtime.
C. doStuff x = 6 main x = 6
D. doStuff x = 5 main x = 5
E. doStuff x = 5 main x = 6
微信支付 
支付宝支付