2011年JAVA认证模拟题第二阶段（18）

会计考友

　　Q52.What does the following program do when it is run with the following command?java Mystery Mighty Mouse
　　1. class Mystery {
2 e6 @3 j: I0 F　　2. public static void main(String args[]) {
, X& y: P# L8 [( Q! Q5 f　　3. Changer c = new Changer();
; M; o5 k2 C4 P7 t+ z, p　　4. c.method(args);
. M( M  P4 o  U  z+ J/ X2 Q　　5. System.out.println(args[0] + “ “ + args[1]);
　　6. ｝
; B: ?. F% U: m9 F5 l　　7. static class Changer {
$ C. l$ s/ i5 A' r4 ?! ^* N& y　　8. void method(String s[]) {
　　9. String temp = s[0];
　　10. s[0] = s[1];
　　11. s[1] = temp;
) X$ a7 L6 a8 x　　12. ｝
　　13. ｝
) I; J3 F' T0 h" g　　14. ｝
8 t  x$ W$ e* m! d+ T6 `, @　　a. The program causes and ArrayIndexOutOfBoundsException to be thrown.
　　b. The program runs but does not write anything to the standard output.
2 |/ O( S6 V% b" q/ G$ k　　c. The program writes “Mighty Mouse” to the standard output.
　　d. The program writes “Mouse Mighty” to the standard output.
　　Q53.What happens when you try to compile and run the following program?
5 A% w5 X$ t0 c; N$ x" C7 z　　1. class Mystery {
7 u2 J9 i1 ~  X4 u: G3 k  X　　2. String s;
　　3. public static void main(String args[]) {
　　4. Mystery m = new Mystery();
4 K+ E( A) h" E, E: ~8 ~4 X/ W4 e　　5. m.go();
! U9 M4 f7 i. }7 w$ k　　6. ｝
0 N2 `4 O/ Y' V" ~# F; W　　7. void Mystery() {
　　8. s = “Constructor”;
# ~$ F, Z* y# f
+ ]! E% c; X2 Y7 A$ b　　9. ｝

会计考友

</p>　　10. void go() {
) z9 f$ B, n: e+ d: g3 [3 I　　11. System.out.println(s);
　　12. ｝
　　13. ｝
' }$ k) M6 z3 S( h  f5 y　　a. The code compiles and throws an exception at run time.
　　b. The code runs, but nothing appears in the standard output.
0 U7 ]+ V$ S' C3 d　　c. The code runs, and “constructor” appears in the standard output.
　　d. The code runs and writes “null” in the standard output.
+ I' ?, c( B% u: c: W/ J/ s　　Q54.What can you write at the comment //A in the following code so that this program writes the word “running” to the standard output?
　　1. class RunTest implements Runnable {
　　2. public static void main(String args[]) {
3 r: o7 e; M6 w1 f　　3. RunTest rt = new RunTest();
　　4. Thread t = new Thread(rt);
# l) E5 s- V. o　　5. //A
　　6. ｝
) O4 k! Q. c, ~+ ^" u4 @! v　　7. public void run() {
3 g  _" J6 `3 W  i　　8. System.out.println(“running”);
7 v, d2 t7 Y+ p' b: T# S　　9. ｝
: W9 G8 T, o0 _3 M( K　　10. void go() {
! h: f3 q& w0 n( a2 C　　11. start(1);
$ Z& c2 Y8 g9 _6 y7 g　　12. ｝
% P' \# s' R) B. D　　13. void start(int i) {
　　14. ｝
　　15. ｝
  y2 P1 e6 Q0 m, v　　Select all valid answers.
( R3 a# o. I+ q* I5 b, ^% ?　　a. System.out.println(“running”);
$ u1 h& d" S, L5 v* ]) C- v  }4 v　　b. t.start();
2 h9 b1 C" k' f5 I% ?　　c. rt.start();
　　d. rt.start(1);
　　52. d
　　53. d
　　54. ab