Java认证模拟题及分析2

文章作者 100test 发表时间 2007:03:26 17:58:29
来源 100Test.Com百考试题网


which of the following statements are true?
1) methods cannot be overriden to be more private
2) static methods cannot be overloaded
3) private methods cannot be overloaded
4) an overloaded method cannot throw exceptions not checked in the base class
answer to question 16
--------------------------------------------------------------------------------
question 17)
what will happen if you attempt to compile and run the following code?
class base {}
class sub extends base {}
class sub2 extends base {}
public class cex{
public static void main(string argv[]){
base b=new base().
sub s=(sub) b.
}
}
1) compile and run without error
2) compile time exception
3) runtime exception

answer to question 17

--------------------------------------------------------------------------------
question 18)
which of the following statements are true?
1) system.out.println( -1 >>> 2).will output a result larger than 10
2) system.out.println( -1 >>> 2). will output a positive number
3) system.out.println( 2 >> 1). will output the number 1
4) system.out.println( 1 <<< 2). will output the number 4

answer to question 18

--------------------------------------------------------------------------------
question 19)
what will happend when you attempt to compile and run the following code?
public class tux extends thread{
static string sname = vandeleur.
public static void main(string argv[]){
tux t = new tux().
t.piggy(sname).
system.out.println(sname).
}
public void piggy(string sname){
sname = sname wiggy.
start().
}
public void run(){
for(int i=0.i < 4. i ){
sname = sname i.
}
}
}
1) compile time error
2) compilation and output of vandeleur wiggy
3) compilation and output of vandeleur wiggy 0 1 2 3
4) compilation and probably output of vandeleur but possible output of vandeleur 0 1 2 3
answer to question 19
--------------------------------------------------------------------------------
question 20)
what will be displayed when you attempt to compile and run the following code
//code start



相关文章


Java认证模拟题及分析3
Java认证模拟题及分析1
JAVA题:定义People及其对象
Java认证模拟题及分析2
排序和金额转换·两道JAVA编程题及答案
澳大利亚华人论坛
考好网
日本华人论坛
华人移民留学论坛
英国华人论坛