SCJP程序员认证考试章节练习(2020.05.15)

A. static class InnerOne {  public double methoda（） {return d1；}  }
B. static class InnerOne {  static double methoda（） {return d1；}  }
C. private class InnerOne {  public double methoda（） {return d1；}  }
D. protected class InnerOne {  static double methoda（） {return d1；}  }
E. public abstract class InnerOne {  public abstract double methoda（）；  }

A. class Man extends Dog { }
B. class Man implements Dog { }
C. class Man { private BestFriend dog； }
D. class Man { private Dog bestFriend； }
E. class Man { private Dog }
F. class Man { private BestFriend }

A. It prints f2[0] = 0.0.
B. It prints f2[0] = NaN.
C. An error at line 5 causes compile to fail.
D. An error at line 6 causes compile to fail.
E. An error at line 6 causes an expectation at runtime.

A. 0
B. null
C. Compilation fails.
D. A NullPointerException is thrown at runtime.
E. An ArrayIndexOutOfBoundsException is thrown at runtime.

A. 0 2 4
B. 0 2 4 5
C. 0 1 2 3 4
D. Compilation fails.
E. An exception is thrown at runtime.

A. Compilation will fail.
B. Compilation will succeed and the program will print “3”
C. Compilation will succeed but the program will throw a ClassCastException at line 6.
D. Compilation will succeed but the program will throw a ClassCastException at line 7.

A. Line 57 will print the value 2.
B. Line 57 will print the value 3.
C. Compilation will fail because of an error in line 55.
D. Compilation will fail because of an error in line 56.

A. When compilation some error will occur.
B. It is correct when compilation but will cause error when running.
C. The output is zero.
D. The output is null.

A. 2
B. 3
C. 1 2
D. 2 3
E. 1 2 3
F. Compilation fails.
G. Au exceptional is thrown at runtime.

A. Compilation fails.
B. ClassC is displayed.
C. The code runs with no output.
D. An exception is thrown at runtime.