JAVA练习题含答案-answers to pratise 5 .pdfVIP

一、MultipleChoice

1.Javaisanobject-orientedprogramminglanguage.Anobject-oriented

language:

(a)Usesstructuredprogramming.

(b)Viewsaprogramasconsistingofobjectswhichcommunicate

throughinteractions.

(c)Functionallybreaksdownproblemsintosmaller,moremanageable

problems.

(d)Alloftheabove.

2.InJava,theequalsignisusedasthe___________operator.

(a)increment(b)decrement

(c)assignment(d)negation

3.InJava,sourcecodeiscompiledintoobjectcodecalled

______________.

(a)Bit-code(b)Classcode

(c)Methodcode(d)Byte-code

4.IdentifytheinvalidJavaidentifier.

(a)1Week(b)Week1

(c)amountDue(d)amount_due

5.Whichoperatorisusedtoconcatenatetwostrings?

(a)+(b)–(c)*(d)/

6.Whichstatementorgroupofstatementsproducestheoutput:

“Java”,I’mcoming!

(a)System.out.print(“Java”,I’mcoming!)

(b)System.out.println(““Java””,I’mcoming!);

(c)System.out.println(“\“Java\”,I\’mcoming!”);

(d)System.out.print(““Java”,I’mcoming!”);

7.Whenthenumberofrepetitionsareunknowninadvance,youshould

usea___________statement.

(a)whileordo„while(b)onlywhile

(c)for(d)Noneoftheabove

8.Amethodthatperformssomeactionotherthanreturningavalueis

calleda__________method.

(a)null(b)void

(c)public(d)private

9.Avariablewhosemeaningisconfinedtoamethoddefinitioniscalled:

(a)instancevariable(b)localvariable

(c)globalvariable(d)noneoftheabove

10.InJava,acommentsblockisdelimitedby:

(a)()(b)/**/

(c)““