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venket 2004-10-21 08:22:40

一
You want a class to have access to members of another class in the same package. Which is the most
restrictive access modifier that will accomplish that will accomplish this objective?
A. Public
B. Private
C. Protected
D. Transient
E. No access modifier is required.
Answer: E

二
Which two statements are true regarding the creation of a default constructor? (Choose Two)
A. The default constructor initializes method variables.
B. The default constructor invokes the no-parameter constructor of the superclass.
C. The default constructor initializes the instance variables declared in the class.
D. If a class lacks a no-parameter constructor,, but has other constructors, the compiler creates a
default constructor.
E. The compiler creates a default constructor only when there are no other constructors for the class.
Answer: C, E

三
Given:
1. public class Foo implements Runnable (
2. public void run (Thread t) {
3. system.out.printIn(“Running.”);
4. }
5. public static void main (String[] args) {
6. new thread (new Foo()).start();
7. )
8. )
What is the result?
A. An exception is thrown.
B. The program exists without printing anything.

四
A. Member data have no access modifiers.
B. Member data can be modified directly.
C. The access modifier for methods is protected.
D. The access modifier to member data is private.
E. Methods provide for access and modification of data.

五
A. An anonymous inner class can be declared inside of a method
B. An anonymous inner class constructor can take arguments in some situation.
C. An anonymous inner class that is a direct subclass that is a direct subclass of Object can implement
multiple interfaces.
D. Even if a class Super does not implement any interfaces, it is still possible to define an anonymous
inner class that is an immediate subclass of Super that implements a single interface.
E. Event if a class Super does not implement any interfaces, it is still possible to define an anonymous
inner class that is an immediate subclass of Super that implements multiple interfaces.
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