單項選擇題

1. interface DoStuff2 { 
2. float getRange(int low, int high); } 
3. 
4. interface DoMore { 
5. float getAvg(int a, int b, int c); } 
6. 
7. abstract class DoAbstract implements DoStuff2, DoMore { } 
8. 
9. class DoStuff implements DoStuff2 { 
10. public float getRange(int x, int y) { return 3.14f; } } 
11. 
12. interface DoAll extends DoMore { 
13. float getAvg(int a, int b, int c, int d); } 
What is the result?() 

A. The file will compile without error.
B. Compilation fails. Only line 7 contains an error.
C. Compilation fails. Only line 12 contains an error.
D. Compilation fails. Only line 13 contains an error.
E. Compilation fails. Only lines 7 and 12 contain errors.
F. Compilation fails. Only lines 7 and 13 contain errors.
G. Compilation fails. Lines 7, 12, and 13 contain errors.

題目列表

你可能感興趣的試題

微信掃碼免費搜題