2024年4月2日发(作者：)
Java认证考试试题
2017年Java认证考试试题
使用Java语言的先进的面向对象特点，包括方法重载，方法覆盖，
抽象类，接口，final，static和访问控制;实现文件的输入输出(I/O)。
下面是店铺整理的关于Java认证考试试题，希望大家认真阅读!
question 1)
which of the following lines will compile without warning or
error.
1) float f=1.3;
2) char c='a';
3) byte b=257;
4) boolean b=null;
5) int i=10;
answer to question 1
question 2)
what will happen if you try to compile and run the following
code
public class myclass {
public static void main(string arguments[]) {
amethod(arguments);
}
public void amethod(string[] arguments) {
n(arguments);
n(arguments[1]);
}
}
1) error can´t make static reference to void amethod.
2) error method main not correct
3) error array must include parameter
4) amethod must be declared with string
answer to question 2
question 3)
which of the following will compile without error
1)
import .*;
package mypackage;
class myclass {}
2)
package mypackage;
import .*;
class myclass{}
3)
/*this is a comment */
package mypackage;
import .*;
class myclass{}
answer to question 3
question 4)
a byte can be of what size
1) -128 to 127
2) (-2 power 8 )-1 to 2 power 8
3) -255 to 256
4)depends on the particular implementation of the java
virtual machine
answer to question 4
question 5)
what will be printed out if this code is run with the following
command line?
java myprog good morning
public class myprog{
public static void main(string argv[])
{
n(argv[2])
}
}
1) myprog
2) good
3) morning
4)
answer to question 5
question 6)
which of the following are keywords or reserved words in
java?
1) if
2) then
3) goto
4) while
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 {}
exception raised:
'ndexoutofboundsexception: 2'
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