Java Basics Interview Questions

97. Difference between Swing and Awt? AWT are heavy-weight componenets. Swings are light-weight components. Hence swing works faster than AWT.

91. Can a public class MyClass be defined in a source file named YourClass.java? No. The source file name, if it contains a public class, must be the same as …

85. Is delete a keyword in Java? No. delete is not a keyword in Java. Java does not make use of explicit destructors the way C++ does. 86. Is exit …

79. What is the catch or declare rule for method declarations? If a checked exception may be thrown within the body of a method, the method must either catch the …

73. What are synchronized methods and synchronized statements? Synchronized methods are methods that are used to control access to an object. A thread only executes a synchronized method after it …

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 …