2011年JAVA认证模拟题（49）

会计考友

　　Q145 Which of the following lines of output are displayed by the following program?
　　class Question {
# g4 e5 j) {! x% b, I. q; _0 J4 k* ~　　public static void main(String args[])
　　{
　　MyThread t = new MyThread();
( W7 E3 d1 d+ H+ I1 {# n9 H/ J　　t.displayOutput ( “ t has been
7 k+ r: h* ]  V# f' \　　created.”);
, E& K; n$ x: n* P　　t.start();
　　｝
　　｝
& k% h; `+ d) f  H　　class MyThread extend Thread {
* j+ s9 u, V+ h7 Y- R+ r. r　　public void displayOutput (String s) {
　　System.out.println(s);
　　｝
　　public void run() {
　　displayOutput (“t is running.”);
　　｝
　　｝
　　A t has been created.
) W( M& L; r! e% s) n: o　　B t is running.
　　C The program will display different output depending on whether the underlying operating system supports preemptive scheduling or time slicing.
　　D None of the above. The program does not compile.
+ u) r) T2 ?& i+ a! x; H; Q　　Q146 Which of the following extend the Collection interface?
　　A Dictionary
　　B List
　　C Map
* N0 \6 A# Q8 h$ q# b6 ^　　D Set
　　Q147 Which of the following are true?
　　A Java only supports preemptive scheduling.
9 n2 |% }) F: i　　B Java only supports time slicing.
0 [! Q* M. B* G　　C The JVM has been implemented on operating systems that use time slicing.
　　D The JVM has been implemented on operating systems that use preemptive scheduling.
& b# ^2 [1 n+ J+ f. a( W' @% |　　Q145 AB
1 X6 H' \9 R) R6 Z0 D9 q$ ]' u　　Q146 BD
　　Q147 CD