java考试选择题ss本.docxVIP

Readthequestionscarefully

Ihavetriedtomakethequestionsunambiguous(themeaningshouldbeobvious),butmakesureyouhavereadwhatIhavewrittennotwhatyouthinkImighthavewritten.ThusifitsaysClassescanbedeclaredwiththeprivatemodifier,itmeansItispossibletodeclareaclasswiththeprivatemodifierandnotthatallclassesinallsituationscanbedeclaredasprivate.EachquestionmayhaveoneormorecorrectAnswers.

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Questions

Question1)

Whichofthefollowinglineswillcompilewithoutwarningorerror.

floatf=1.3;

charc=a;

byteb=257;

booleanb=null;

inti=10;

Question2)

Whatwillhappenifyoutrytocompileandrunthefollowingcode

publicclassMyClass{

publicstaticvoidmain(Stringarguments[]){amethod(arguments);

}

publicvoidamethod(String[]arguments){System.out.println(arguments);System.out.println(arguments[1]);

}

}

errorCantmakestaticreferencetovoidamethod.

errormethodmainnotcorrect

errorarraymustincludeparameter

amethodmustbedeclaredwithString

Becausemainisdefinedasstaticyouneedtocreateaninstanceoftheclassinordertocallanynon-staticmethods.

Question3)

Whichofthefollowingwillcompilewithouterror

要先出现package

importjava.awt.*;packageMypackage;classMyclass{}

packageMyPackage;importjava.awt.*;classMyClass{}

/*Thisisacomment*/packageMyPackage;importjava.awt.*;classMyClass{}

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Question4)

Abytecanbeofwhatsize

-128to127

(-2power8)-1to2power8

-255to256

dependsontheparticularimplementationoftheJavaVirtualmachine

Question5)

Whatwillbeprintedoutifthiscodeisrunwiththefollowingcommandline?

Java myprog good morning;

publicclassmyprog{

publicstaticvoidmain(Stringargv[])

{

System.out.println(argv[2]);

}

}

myprog

good

morning

Exceptionraised:java.lang.ArrayIndexOutOfBoundsException:2

Question6)

Whichofthefollowingarekeywordsorreserved（预定义）wordsinJava?

if

then

goto

while

case

Question7