2011年JAVA认证模拟题（30）

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java认证试题：2011年JAVA认证模拟题（30）
　Q88 What changes are needed to make the following program compile?
* t, }7 ~9 T5 P" H　　import java.util.*;
! M+ g+ k( S& S2 K3 ]8 H+ s　　class Question {
6 `7 j) T  `8 q  F8 T3 B9 t　　public static void main(String args[])
6 s, e+ U0 A; y2 B! Z/ ^6 V　　{
3 @; W0 |6 R6 c- b/ ~% f　　String s1 = “abc”;
3 T9 \; H5 H( K0 B4 m　　String s2 = “def”;
　　Vector v = new Vector();
" U' O7 J: @) @5 Z1 v2 b　　v.add(s1);
4 Z! O1 \( I% ?  w! E　　v.add(s2);
4 t- l' u2 _2 d7 ~2 |, [　　String s3 = v.elementAt(0) +
4 f9 u/ R- o+ y2 l# D% j　　v.elementAt(1);
, G3 m# M0 t) _0 ]5 L- G& s; E　　System.out.println(s3);
　　｝
　　｝
　　A Declare Question as public
. f8 r& A4 K" r% l" g: Q8 z　　B Cast v.elementAt(0) to a String
( ^2 Q' p2 n8 n% h! F$ b0 ?& Y　　C Cast v.elementAt(1) to an Object
　　D Import java.lang
　　Q89 What is the value of a[3] as the result of the following array declaration?
　　int [] a = {1,2,3,4,5｝;
1 L4 j5 ]6 T! k& v% |& h2 Z　　A 1
　　B 2
9 W& q! b+ r3 R2 J" }' |　　C 3
　　D 4
2 x$ C* j" ]4 G& W　　Q90 What Java statement is used to completely abort the execution of a loop?
　　A The continue statement.
　　B The goto statement
% v0 c3 j- q) c- _: b5 `/ w2 d+ o* a　　C The exit statement
5 ^) `3 N7 _- Q) k4 [; E　　D The bread statement
　　Q088 B
; f: W! Y/ O# k' z; T$ z1 |" Y* e　　Q089 D
　　Q090 D