2011年JAVA认证模拟题第二阶段（30）

会计考友

　　Q88.Given the following snippet of code 1. char c = -1;
　　What is the result of compiling the above snippet.
　　a. It will cause a compiler error as the range of character is between 0 and 2^16 - 1. Will request for an explicit cast.
- A  k4 v: D1 p! S　　b. It will not cause a compiler error and c will have the value -1;
2 o0 u4 v! E8 ~6 E　　c. The variable c will not represent any ascii character.
, s7 F/ L0 r1 N, Z# ?4 j$ y5 D　　d. The variable c will s till be a unicode character.
　　Q89.Given the following code fragment.
& v8 d) B4 E* u) I3 l0 M/ R　　1. switch( x ) {
　　2. case 100
　　3. System.out.println(“One hundred”); break;
! ~' f& M5 K! ^9 R. u　　4. case 200
- f* L; w3 L0 @, D1 }　　5. System.out.println(“Two hundred”); break;
1 \2 T( C1 R( ]# x4 R　　6. case 300
　　7. System.out.println(“Three hundred”); break;
　　8. ｝
　　Choose all of the declarations of x that will not cause a compiler error.
　　a. byte x = 100;
1 O( U' I, R9 m0 T' Q　　b. short x = 200;
　　c. int x = 300;
　　d. long x = 400;
　　Q90.What happens to the file system when the following code is run and the myFile object is created? Assume that name represents a valid path and file name for a file that does not presently exist.
　　1. File createFile(String name) {
　　2. File myFile = new File(name);
" b  _! }8 u# q3 k% F, k　　3. return myFile;
　　4. ｝
　　[Check all correct answers]
3 v0 m7 Q5 k0 _. u- C/ z　　a. A new empty file with that name is created but not opened.
* R5 c+ q2 w, M3 M$ D$ a　　b. The current directory changes to that specified in name
/ }4 m1 ?  r" ]1 Q　　c. A new emty file with that name is created and opened.
8 ~' P2 Q4 Y" q　　d. None of the above
　　88. a
4 C! s# W- Y" f$ t　　89. bc
* v$ J* l  Q+ K  ~3 q. {　　90. d