OCJP视频课堂，具体讲解：https://edu.csdn.net/course/detail/7811
QUESTION 139
Giventhe following directory structure: bigProject |--source | |--Utils.java ||--classes |-- And the following command line invocation: javac -d classessource/Utils.java Assume the current directory is bigProject, what is theresult?
A. If the compile is successful, Utils.class is added to thesource directory.
B. The compiler returns an invalid flag error.
C. If the compile is successful, Utils.class is added to theclasses directory.
D. If the compile is successful, Utils.class is added to thebigProject directory.
Answer: C
Section: (none)
QUESTION 155
Given:
10. interface Data { public voidload(); }
11. abstract class Info { publicabstract void load(); }
Which class correctly uses the Datainterface and Info class?
A. public class Employee extendsInfo implements Data { public void load() { /*do something*/ }
}
B. public class Employeeimplements Info extends Data { public void load() { /*do something*/ }
}
C. public class Employee extendsInfo implements Data { public void load(){ /*do something*/ }public voidInfo.load(){ /*do something*/ }
}
D. public class Employeeimplements Info extends Data { public void Data.load(){ /*do something*/}public void load(){ /*do something*/ }
}
E. public class Employeeimplements Info extends Data { public void load(){ /*do something*/ }publicvoid Info.load(){ /*do something*/ }
}
F. public class Employee extendsInfo implements Data{public void Data.load() { /*do something*/ }
public void Info.load() { /*do something*/}
}
Answer: A
QUESTION 156 Given:
11. public class Rainbow {
12. public enum MyColor {
13. RED(0xff0000), GREEN(0x00ff00),BLUE(0x0000ff);
14. private final int rgb;
15. MyColor(int rgb) { this.rgb =rgb; }
16. public int getRGB() { returnrgb; }
17. };
18. public static voidmain(String[] args) {
19. // insert code here
20. }
21. }
Which code fragment, inserted at line 19,allows the Rainbow class to compile?
A. MyColor skyColor = BLUE;
B. MyColor treeColor =MyColor.GREEN;
C. if(RED.getRGB()
