SCJP试题-SCJPMockExam2

来源:java认证发布时间:2012-11-12 12:48:16java认证视频



Question 41)
You are creating an application that has a form with a text entry field used to enter a persons age. Which of the following is appropriate for capturing this information.


1) Use the Text field of a TextField and parse the result using Integer
2) Use the getInteger method of the TextField
3) Use the getText method of a TextBox and parse the result using the getInt method of Integer class
4) Use the getText method of a TextField and use the parseInt method of the Integer class

Answer to Question 41)


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Question 42)
Given the following declaration


Integer i=new Integer(99);


How can you now set the value of i to 10?


1) i=10;
2) i.setValue(10);
3) i.parseInt(10);
4) none of the above





Answer to Question 42)


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Question 43)
Which of the following statements are true

1) constructors cannot be overloaded
2) constructors cannot be overridden
3) a constructor can return a primitive or an object reference
4) constructor code executes from the current class up the hierarchy to the ancestor class



Answer to Question 43)


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Question 44)
Given a reference called

t

to to a class which extends Thread, which of the following will cause it to give up cycles to allow another thread to execute.

1) t.yield();
2) yield();
3) yield(100); //Or some other suitable amount in milliseconds
4) yield(t);

Answer to Question 44)


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Question 45)
What will happen when you attempt to compile and run the following code?

public class Sandys{
private int court;
public static void main(String argv[]){
Sandys s = new Sandys(99);
System.out.println(s.court);
}
Sandys(int ballcount){
court=ballcount;
}
}

1) Compile time error, the variable court is defined as private
2) Compile time error, s is not initialized when the System.out method is called
3) Compilation and execution with no output
4) Compilation and run with an output of 99

Answer to Question 45)


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