Try to find out the reasons of your stress is always the first step to overcome stress.() 此题为判断题(对,错)。

Try to find out the reasons of your stress is always the first step to overcome stress.()

此题为判断题(对,错)。


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PublicclassHoltextendsThread{PrivateStringsThreadName;Publicstaticvoidmain(Stringargv[]){Holth=newHolt();h.go();Holt(){};Holt(Strings){sThreadName=s;PublicStringgetThreadName(){returnsThreadName;}}Publicvoidgo(){Hotfirst=newHot(first);first.start();Hotsecond=newHot(second);second.start();}Publicvoidstart(){For(inti=0;i2;i++){System.out.print(getThreadName()+i);Try{Thread.sleep(100);}catch(Exceptione){System.out.print(e.getMessage());}}}}当编译运行上面代码时,将会出现()A.编译时错误B.输出first0,second0,first0,second1C.输出first0,first1,second10,second1D.运行时错误

阅读以下说明和Java代码,将应填入(n)处的字句写在对应栏内。【说明】下面的Java程序演示了程序竞争资源(Mutex的实例对象)而引起程序死锁的一种例子。【Java程序】import java.applet.*;import java.awt.*;//此处声明一个互斥类class Mutex { }class A extends (1){private Mutex first,second;public A(Mutex f,Mutex s){first = f;second = s;}public void run(){//锁定first变量(2) (first){try{ //本线程挂起,等待重新调度Thread.sleep(1); //注意此处(1)不是小题序号}catch(InterruptedException e){}System. out. println("threadA got first mutex");(2) (second) //锁定second变量{ //do somethingSystem. out. println("threadA got second mutex");} //释放second变量} //释放first变量}}class B extends (1){private Mutex first,second;public B(Mutex f,Mutex s){(3) ;second = s;}public void run(){(2) (second) //锁定second变量{//do somethingtry{Thread.sleep(((int)(3*Math.random()))*1000);//本线程挂起,等待重新调度}catch(InterruptedException e){}System.out.println("threadB got second mutex");(2) (first) //锁定first变量{//do somethingSystem.out.println("threadB got first mutex");} //释放first变量} //释放second变量}}public class DeadlockExample{public static void main(String arg[]){Mutex mutexX = new Mutex();Mutex mutexY = new Mutex();AthreadA = new A(mutexX,mutexY);B threadB = new B (4);threadA.(5);threadB.start();}}

classOrderimplementsRunnable{publicvoidrun(){try{Thread.sleep(2000);}catch(Exceptione){}System.out.print(in);}publicstaticvoidmain(String[]args){Threadt=newThread(newOrder());t.start();System.out.print(pre);try{t.join();}catch(Exceptione){}System.out.print(post);}}可产生哪两项结果?()A.inpreB.preinC.inprepostD.preinpost

classBirds{publicstaticvoidmain(String[]args){try{thrownewException();}catch(Exceptione){try{thrownewException();}catch(Exceptione2){System.out.print(inner);}System.out.print(middle);}System.out.print(outer);}}结果为:()A.innerB.innerouterC.middleouterD.innermiddleouter

classOrderimplementsRunnable{publicvoidrun(){try{Thread.sleep(2000);}catch(Exceptione)System.out.print(in);publicstaticvoidmain(String[]args){Threadt=newThread(newOrder());t.start();System.out.print(pre);try{t.join();}catch(Exceptione){}System.out.print(post);可产生哪两项结果?()A.preinpostB.preinC.inpostpreD.inprepostE.prepostin

现有:classBirds{publicstaticvoidmain(String[]args){try{thrownewException();}catch(Exceptione){try{thrownewException();}catch(Exceptione2){System.out.print(inner);}System.out.print(middle);}System.out.print(outer);}}结果是()A.innerouterB.middleouterC.innermiddleouterD..编译失败

staticvoidtest()throwsRuntimeException{try{System.out.print(”test);thrownewRuntimeException();}catch(Exceptionex){System.out.print(”exception);}}publicstaticvoidmain(String[]args){try{test();}catch(RuntimeExceptionex){System.out.print(”runtime);}System.out.print(”end);}Whatistheresult?()A.testendB.Compilationfails.C.testruntimeendD.testexceptionendE.AThrowableisthrownbymainatruntime.

staticvoidtest(){try{Stringx=null;System.out.print(x.toString()+);}finally{System.out.print(finally);}}publicstaticvoidmain(String[]args){try{test();}catch(Exceptionex){System.out.print(”exception);}}Whatistheresult?()A.nullB.finallyC.nullfinallyD.Compilationfails.E.finallyexception

publicclassTest{publicstaticvoidaMethod()throwsException{try{thrownewException();}finally{System.out.println(finally”);}}publicstaticvoidmain(Stringargs[]){try{aMethod();}catch(Exceptione){System.out.println(exception”);}System.out.println(finished”);}}Whatistheresult?()A.finallyB.exceptionfinishedC.finallyexceptionfinishedD.Compilationfails.

Whatarethethreemodelsofqualityofservice(QoS)inanetwork?() A.ResourceReservationProtocol(RSVP)B.first-in,first-out(FIFO)C.best-effortD.CBWFQE.IntServF.DiffServ