Answer:
 The answer to the given question is it will produce an "error"  
Explanation:
In the given java program it will produce an error because in java we do not use double quote("""") for message printing. We use a single quote("") for message printing. In the given program if we use a single quote(""). so it will give output that is "dogood:dogood".
The correct program to this question is can be given as:
Program:
public class Test  //define a class test.
{
    public static void main(String[] args)  //define main method
    {
        Test obj = new Test();   //create class object  
        obj.start(); //calling function
    }  
    void start()  //define function start.  
    {
        String stra = "do";   //define variable and assign value.
        String strb = method(stra);  //define variable and pass stra variable in method() function as a parameter.
        System.out.print(":"+stra + strb); //print value.  
    }
    String method(String stra)  //define function method  
    {  
        stra = stra + "good";   //add value
        System.out.print(stra);  //print value of stra
        return"good";  //return value
    }
}
Output:
dogood:dogood