致远信息技术人才招聘笔试试题卷

（C一、选择

TrytolookthroughtheinformationaboutemployeeSmith,butnotsurethecasestoredinthedatabase.whichstatementiscorrectselectlastname,firstnamefromempwhereselectlastname,firstnamefromempwhereselectlastname,firstnamefromempwhereTheemployeetable:First_nameVarchar2(25)Last_nameEvaluatethefollowingselectSELECTCONCAT(first_name,last_name),length(concat(first_name,FROMWHEREupper(last_name)like'%L'ORupper(last_name)like'%J'ORupper(last_name)like SELECTINITCAP(first_name||last_name),length(last_name)+length(FROMWHEREINITCAP(SUBSTR(last_name,1,1))in('J','K',Thetwostatementswillretrievethesamedata,butdisplayThetwostatementswillretrievethedifferentc.Statement1willnotD.Statement2willnot3、Whichofthefollowinglineswillcompilewithoutwarningorfloatf=charc=byteb=booleanb=inti=4、WhatwillhappenifyoutrytocompileandrunthefollowingcodepublicclassMyClass{publicstaticvoidmain(String{}publicvoidamethod(String[]{}}errorCan'tmakestaticreferencetovoiderrormethodmainnoterrorarraymustincludeamethodmustbedeclaredwith5、Whatwillbeprintedoutifthiscodeisrunwiththefollowingcommandlinejavamyproggoodmorningpublicclasspublicstaticvoidmain(String{}}1) 2) 3)4)Exceptionraised:"java.lang.ArrayIndexOutOfBoundsException:6、Whichofthefollowingare 2) 3) 4) 5)7、Whichofthefollowingarelegal 2) 3)4) 5) 6)8、WhatwillhappenwhenyoucompilethefollowingpublicclassMyClass{staticinti;publicstaticvoidmain(Stringargv[]){}}ErrorVariableimaynothavebeen109、WhatwillhappenifyoutrytocompileandrunthefollowingcodepublicclassQ{publicstaticvoidmain(Stringargv[]){intanar[]=newint[]{1,2,3};}}1)Erroranarisreferencedbeforeitis2Errorsizeofarraymustbe10、WhatwillhappenifyoutrytocompileandrunthefollowingcodepublicclassQ{publicstaticvoidmain(Stringargv[]){intanar[]=newint[5];}}Error:anarisreferencedbeforeitis0511、Whatwillbeprintedoutifyouattempttocompileandrunthefollowingcodeinti=1;switch(i){case0:casec