67. What is daemon thread and which method is used to create the daemon thread? Daemon thread is a low priority thread which runs intermittently in the back ground doing …
61. What is the purpose of finalization? The purpose of finalization is to give an unreachable object the opportunity to perform any cleanup processing before the object is garbage collected.
55. If I write System.exit(0); at the end of the try block, will the finally block still execute? No. In this case the finally block will not execute because when …
49. If I want an object of my class to be thrown as an exception object, what should I do? The class should extend from Exception class. Or you can …
37. What is Externalizable interface? Externalizable is an interface which contains two methods readExternal and writeExternal. These methods give you a control over the serialization mechanism. Thus if your class …
31. Primitive data types are passed by reference or pass by value? Primitive data types are passed by value. 32. Objects are passed by value or by reference? Java only …
25. Does importing a package imports the subpackages as well? Example: Does importing com.MyTest.* also import com.MyTest.UnitTests.*? No you will have to import the subpackages explicitly. Importing com.MyTest.* will import …
19. Can an application have multiple classes having main() method? Yes it is possible. While starting the application we mention the class name to be run. The JVM will look …
13. What if I write static public void instead of public static void? Program compiles and runs properly. 14. What if I do not provide the String array as the …
27. How does Java handle integer overflows and underflows? It uses those low order bytes of the result that can fit into the size of the type allowed by the …
