A. import java.io.*.；
B. include java.io.*；
C. import java.io.PrintWriter；
D. include java.io.PrintWRiter；
E. No statement in needed.

A. 1
B. 2
C. 3
D. 4
E. 5

A. float getVar（） {return x：}
B. public float getVar（） {return x； }
C. public double getVar（） {return x； }
D. protected float getVar（） {return x； }
E. public float getVar（float f） {return f；}

A. The foo initialization parameter CANNOT be set programmatically.
B. Compilation fails because getlnitParameter returns type Object.
C. The foo initialization parameter is NOT a servlet initialization parameter.
D. Compilation fails because ServletContext does NOT have a getlnitParameter method.
E. The foo parameter must de defined within the  element of the deployment  descriptor.
F. The foo initialization parameter can also be retrievedusing getSErvletConfig（）.  GetlnitParameter （“foo”）.

A. request.getHeader （“X-Retries”）
B. request.getIntHeader （“X-Retries”）
C. request.getRequestHeader （“x-Retries”）
D. request.getHeaders （“X-Retries”）.get （0）
E. re request.getRequest Headers （“X-Retries”）. Get （0）

A. i = 6 and j = 5
B. i = 5 and j = 5
C. i = 6 and j = 4
D. i = 5 and j = 6
E. i = 6 and j = 6

A. just after line 5
B. just after line 6
C. just after line 7 （That is. As the method returns）
D. Never in this method

A. false
B. default
C. _object
D. a-class

A. 3 / 2
B. 3 < 2
C. 3 * 4
D. 3 << 2
E. 3 * 22
F. 3 <<<2

A. The MyCircle class is full encapsulated.
B. The diameter of a given MyCircle is guaranteed to be twice its radius.
C. Lines 6 and 7 should be in a synchronized block to ensure encapsulation.
D. The radius of a MyCircle object can be set without affecting its diameter.