单项选择题Youneedtocreateaservletfilterthatstoresallrequestheaderstoadatabaseforallrequeststothewebapplication’shomepage index.jsp .WhichHttpServletRequestmethodallowsyoutoretrievealloftherequestheaders?()A.String[]getHeaderNames()B.String[]getRequestHeaders()C.java.util.IteratorgetHeaderNames()D.java.util.IteratorgetRequestHeaders()E.java.util.EnumerationgetHeaderNames()
单项选择题Youissuedthefollowingcommand:ALTERDATABASEENABLEBLOCKCHANGETRACKING;Whatwillbetheresultofissuingthiscommand?()
单项选择题Inwhichsituationwouldyouusestaticdatabaseregistrationforalistener()
单项选择题publicclassTwoThreads{privatestaticObjectresource=newObject();privatestaticvoiddelay(longn){try{Thread.sleep(n);}catch(Exceptione){System.out.print(”Error);}}publicstaticvoidmain(String[]args){System.out.print(”StartMain);newThread1().start();delay(1000);Threadt2=newThread2();t2.start();delay(1000);t2.interruptdelay(1000);System.out.print(”EndMain);}staticclassThread1extendsThread{publicvoidrun(){synchronized(resource){System.out.print(”Startl);delay(6000);System.out.print(”End1);}}}staticclassThread2extendsThread{publicvoidrun(){synchronized(resource){System.out.print(”Start2);delay(2000);System.out.print(”End2);}}}}Assumethatsleep(n)executesinexactlymmilliseconds,andallothercodeexecutesinaninsignificantamountoftime.Whatistheoutputifthemain()methodisrun?()
单项选择题在C#中,基本的文件操作是由()命名空间提供的类来实现的。
A.System.DataB.System.ConfigurationC.System.CollectionsD.System.IO
单项选择题关于编写货号的描述,以下哪个是正确的?()
单项选择题AwebbrowserneedNOTalwaysperformacompleterequestforaparticularpagethatitsuspectsmightNOThavechanged.TheHTTPspecificationprovidesamechanismforthebrowsertoretrieveonlyapartialresponsefromthewebserver;thisresponseincludesinformation,suchastheLast-ModifieddatebutNOTthebodyofthepage.WhichHTTPmethodwillthebrowserusetoretrievesuchapartialresponse?()A.GETB.ASKC.SENDD.HEADE.TRACE
单项选择题现有:1.classBook{2.privatefinalvoidread(){System.out.print( book );}3.}4.classPageextendsBook{5.publicstaticvoidmain(String[]args){6. insertcodehere7.}8.privatefinalvoidread(){System.out.print( page );}9.}和如下三个代码片段(x,y,z):x. justacommenty.newPage().read();z.newBook().read();分别插入到第6行,有几个允许代码通过编译并可以运行且无异常?()A.0B.1C.2D.3
单项选择题在保存图片时,要满足淘宝发布图片大小不大于120K的要求的最简便的方法是()
单项选择题1.publicinterfaceA{2.publicvoiddoSomething(Stringthing);3.}1.publicclassAImplimplementsA{2.publicvoiddoSomething(Stringmsg){}3.}1.publicclassB{2.publicAdoit(){3. morecodehere4.}5.6.publicStringexecute(){7. morecodehere8.}9.}1.publicclassCextendsB{2.publicAImpldoit(){3. morecodehere4.}5.6.publicObjectexecute(){7. morecodehere8.}9.}Whichstatementistrueabouttheclassesandinterfacesintheexhibit?()