scjp mock exam 2

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1、SCJPMockExam2Question1)Whichofthefollowingarelegalstatements?1)floatf=1/3;2)inti=1/3;3)floatf=1.01;4)doubled=999d;AnswertoQuestion1)--------------------------------------------------------------------------------Question2)WhichofthefollowingareJavakeywords?1)NULL2)

2、new3)instanceOf4)wendAnswertoQuestion2)--------------------------------------------------------------------------------Question3)Whichofthefollowingarevalidstatements?1)System.out.println(1+1);2)inti=2+'2';3)c4)byteb=255;AnswertoQuestion3)--------------------------

3、------------------------------------------------------Question4)Whichofthefollowingstatementsaretrue?1)ThegarbagecollectionalgorithminJavaisvendorimplemented2)Thesizeofprimitivesisplatformdependent3)Thedefaulttypeforanumericalliteralwithdecimalcomponentisafloat.4)Y

4、oucanmodifythevalueinanInstanceoftheIntegerclasswiththesetValuemethodAnswertoQuestion4)--------------------------------------------------------------------------------Question5)Whichofthefollowingaretruestatements?1)I/OinJavacanonlybeperformedusingtheListenerclasse

5、s2)TheRandomAccessFileclassallowsyoutomovedirectlytoanypointafile.3)ThecreationofanamedinstanceoftheFileclasscreatesamatchingfileintheunderlyingoperatingsystemonlywhentheclosemethodiscalled.4)ThecharacteristicsofaninstanceoftheFileclasssuchasthedirectoryseparator,d

6、ependonthecurrentunderlyingoperatingsystemAnswertoQuestion5)--------------------------------------------------------------------------------Question6).Whichofthefollowingstatementsaretrue?1)Theinstanceofoperatorcanbeusedtodetermineifareferenceisaninstanceofaclass,b

7、utnotaninterface.2)Theinstanceofoperatorcanbeusedtodetermineifareferenceisaninstanceofaparticularprimitivewrapperclass3)Theinstanceofoperatorwillonlydetermineifareferenceisaninstanceofaclassimmediatelyaboveinthehierarchybutnofurtheruptheinheritancechain4)Theinstanc

8、eofoperatorcanbeusedtodetermineifonereferenceisofthesameclassasanotherreferencethusAnswertoQuestion6)--------------------------------------------