java工程师考试

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1、第一题：(过程可以写在后面)学校的毕业话剧演出由四个小美女来出演小红帽、美羊羊、女巫和公主的角色。没人在排练时的角色与演出时的角色不同。排练时出演小红帽的人会撒谎，通过如下消息，请判断四人在演出和排练时分别出演什么角色。梅：“排练时，兰的角色是演出时竹的角色。”兰：“菊排练时扮演的是美羊羊。”竹：“演出时我演公主。”菊：“兰演出时扮演的是美羊羊。”第二题：解数独题(数独是九宫格(即3格宽x3格高))正方形状，每一格又细分为一个九宫格，在没一个小九宫格中，分别填上1~9个数字，让每一个大九宫格没一列，没一行的数字都不重复。817469483385275

2、6966511831、Whichlinecontainsaconstructorinthisclassdefinition?publicclassCounter{//(1)intcurrent,step;publicCounter(intstartVaue,intstepValue){//(2)set(startValue);setStepValue(steValue);}publicintget(){returncurrent;}//(3)publicvoidset(intvalue){current==value;}//(4)publicvoid

3、setStepValue(intstepValue){step==stepValue;}//(5)}1)Codemarkedwith(1)isaconstructor2)Codemarkedwith(2)isaconstructor3)Codemarkedwith(3)isaconstructor4)Codemarkedwith(4)isaconstructor5)Codemarkedwith(5)isaconstructor2、Aninstancemember...1)isalsocalledastaticmember2)isalwaysavari

4、able3)isneveramethod4)belongstoasingleinstance,nottotheclassasawhole5)alwaysrepresentsanoperation3、Giventhefollowingclass,whichstatementscanbeinsertedatpositionIwithoutcausingthecodetofailcompilation?publicclassQ6db8{inta;intb=0;staticintc;publicvoidm(){intd;inte=0;//Position1}

5、}1)a++2)b++3)c++4)d++5)e++7、Whatiswrongwiththefollowingcode?ClassMyExceptionextendsException{}Publicclassqb4ab{Publicvoidfoo(){Try{Bar();}finally{Baz();}catch(MyExceptione){}Publicvoidbar()throwsMyException{ThrownewException();}Publicvoidbaz()throwsRuntimeException{ThrownewRunt

6、imeException();}}4、)Sincethemethodfoo()doesnotcatchtheexceptiongeneratedbythemethodbaz(),itmustdeclaretheRuntimeExceptioninitsthrowsclause.4、)Athetryblockcannotbefollowedbybothacatchandafinallyblock.5、)Anemptycatchblockisnotallowed.6、)Acatchblockcannotfollowafinallyblock.7、)Afi

7、nallyblockmustalwaysfollowoneormorecatchblocks.5、WhatwillhappenwhenyouattempttocompileandrunthefollowingprogrambypassingtheTestclasstotheJavainterpreter?ClassTest{Publicstaticvoidmain{System.out.print(“hello”);}}Selecttheonerightanswer.6.theprogramdoesnotcompilebecausemain()isn

8、otdefinedcorrectly.7.Theprogramcompilesbutwhenyoutryto