scjp mock exam 1.doc

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1、SCJPMockExam1Q1Amethodis...1)animplementationofanabstraction.2)anattributedefiningthepropertyofaparticularabstraction.3)acategoryofobjects.4)anoperationdefiningthebehaviorforaparticularabstraction.5)ablueprintformakingoperations.Q2Anobjectis...1)whatclassesareinstan

2、tiatedfrom.2)aninstanceofaclass.3)ablueprintforcreatingconcreterealizationofabstractions.4)areferencetoanattribute.5)avariable.Q3Whichlinecontainsaconstructorinthisclassdefinition?publicclassCounter{//(1)intcurrent,step;publicCounter(intstartValue,intstepValue){//(2

3、)set(startValue);setStepValue(stepValue);}publicintget(){returncurrent;}//(3)publicvoidset(intvalue){current=value;}//(4)publicvoidsetStepValue(intstepValue){step=stepValue;}//(5)}1)Codemarkedwith(1)isaconstructor2)Codemarkedwith(2)isaconstructor3)Codemarkedwith(3)i

4、saconstructor4)Codemarkedwith(4)isaconstructor5)Codemarkedwith(5)isaConstructorQ4GiventhatThingisaclass,howmanyobjectsandreferencevariablesarecreatedbythefollowingcode?Thingitem,stuff;item=newThing();Thingentity=newThing();1)Oneobjectiscreated2)Twoobjectsarecreated3

5、)Threeobjectsarecreated4)Onereferencevariableiscreated5)Tworeferencevariablesarecreated6)Threereferencevariablesarecreated.Q5Aninstancemember…1)isalsocalledastaticmember2)isalwaysavariable3)isneveramethod4)belongstoasingleinstance,nottotheclassasawhole5)alwaysrepres

6、entsanoperationQ6HowdoobjectspassmessagesinJava?1)Theypassmessagesbymodifyingeachother'smembervariables2)Theypassmessagesbymodifyingthestaticmembervariablesofeachother'sclasses3)Theypassmessagesbycallingeachother'sinstancemembermethods4)Theypassmessagesbycallingstat

7、icmembermethodsofeachother'sclasses.Q7Giventhefollowingcode,whichstatementsaretrue?classA{intvalue1;}classBextendsA{intvalue2;}1)ClassAextendsclassB.2)ClassBisthesuperclassofclassA.3)ClassAinheritsfromclassB.4)ClassBisasubclassofclassA.5)ObjectsofclassAhaveamemberva

8、riablenamedvalue2.Q8IfthissourcecodeiscontainedinafilecalledSmallProg.java,whatcommandshouldbeusedtocompileitusingtheJDK?publicclassSmallP