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单项选择题 Given the following code：
public class Person{
int arr[] = new int[10]；
public static void main（String a[]） {
System.out.println（arr[1]）；
}
}
Which statement is correct？（）

A. When compilation some error will occur.
B. It is correct when compilation but will cause error when running.
C. The output is zero.
D. The output is null.

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1.单项选择题 Given the following code：
public class Person{ static int arr[] = new int[10]；
public static void main（String a[]） {
System.out.println（arr[1]；）
}
}
Which statement is correct？（）

A. When compilation some error will occur.
B. It is correct when compilation but will cause error when running.
C. The output is zero.
D. The output is null.

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2.多项选择题Which statements about Java code security are true？（）

A. The bytecode verifier loads all classes needed for the execution of a program.
B. Executing code is performed by the runtime interpreter.
C. At runtime the bytecodes are loaded， checked and run in an interpreter.
D. The class loader adds security by separating the namespaces for the classes of the local file system from those imported from network sources.

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3.单项选择题 Given the following code fragment：
1） String str = null；
2） if （（str != null） && （str.length（） > 10）） {
3） System.out.println（"more than 10"）；
4） }
5） else if （（str != null） & （str.length（） < 5）） {
6） System.out.println（"less than 5"）；
7） }
8） else { System.out.println（"end"）； }
Which line will cause error？（）

A. line 1
B. line 2
C. line 5
D. line 8

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4.单项选择题A class design requires that a member variable cannot be accessible directly outside the class. Which modifier should be used to obtain the access control？（）

A. public
B. no modifier
C. protected
D. private

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5.多项选择题Which of the following statements about variables and scope are true？（）

A. Local variables defined inside a method are destroyed when the method is exited.
B. Local variables are also called automatic variables.
C. Variables defined outside a method are created when the object is constructed.
D. A method parameter variable continues to exist for as long as the object is needed in which the method is defined.

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6.单项选择题 Given the following code：
1） public void modify（） {
2） int i， j， k；
3） i = 100；
4） while （ i > 0 ） {
5） j = i * 2；
6） System.out.println （" The value of j is " + j ）；
7） k = k + 1；
8） i--；
9） }
10） }
Which line might cause an error during compilation？（）

A. line 4
B. line 6
C. line 7
D. line 8

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7.多项选择题In the Java API documentation which sections are included in a class document？（）

A. The description of the class and its purpose
B. A list of methods in its super class
C. A list of member variable
D. The class hierarchy

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8.多项选择题Which of the following statements about declaration are true？（）

A. Declaration of primitive types such as boolean， byte and so on does not allocate memory space for the variable.
B. Declaration of primitive types such as boolean， byte and so on allocates memory space for the variable.
C. Declaration of nonprimitive types such as String， Vector and so on does not allocate memory space for the object.
D. Declaration of nonprimitive types such as String， Vector ans so on allocates memory space for the object.

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9.单项选择题 Given the following code：
public class Test {
void printValue（int m）{
do {
System.out.println（"The value is"+m）；
}
while（ --m > 10 ）
}
public static void main（String arg[]） {
int i=10；
Test t= new Test（）；
t.printValue（i）；
}
}
Which will be output？（）

A. The value is 8
B. The value is 9
C. The value is 10
D. The value is 11

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10.多项选择题 public void test（） {
try { oneMethod（）；
System.out.println（"condition 1"）；
}
catch （ArrayIndexOutOfBoundsException e） {
System.out.println（"condition 2"）；
}
catch（Exception e） {
System.out.println（"condition 3"）；
}
finally {
System.out.println（"finally"）；
}
}
Which will display if oneMethod run normally？（）

A. condition 1
B. condition 2
C. condition 3
D. finally

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