Category: Interview Faqs

RMI Interview Questions 1 what is RMI? Ans: Remote Method Invocation (RMI) is the process of activating a method on a remotely running object. RMI offers location transparency in the sense that it gives the feel that a method is executed on a locally running object. 2 what is the basic principle of RMI architecture? Ans:The RMI architecture is based …

EJB Interview Questions 1 what are Enterprise Java Beans? Ans: Enterprise Java Beans (EJB) is a specification which defines a component architecture for developing distributed systems. Applications written using the Enterprise JavaBeans architecture are resusable, scalable, transactional, and secure. Enterprise Java Bean’s allow the developer to only focus on implementing the business logic of the application. 2 what is a …

JSP Interview Questions 1 Briefly explain about Java Server Pages technology? Ans: JavaServer Pages (JSP) technology provides a simplified, fast way to create web pages that display dynamically-generated content. The JSP specification, developed through an industry-wide initiative led by Sun Microsystems, defines the interaction between the server and the JSP page, and describes the format and syntax of the page. …

Servlet Interview Questions 1 what is a Servlet? Ans: A Servlet is a server side java program which processes client requests and generates dynamic web content. 2 Explain the architechture of a Servlet? Ans: The javax.servlet.Servlet interface is the core abstraction which has to be implemented by all servlets either directly or indirectly. Servlet run on a server side JVM …

JDBC Interview Questions and Answers 1 what is JDBC? Ans: JDBC is a layer of abstraction that allows users to choose between databases. JDBC allows you to write database applications in Java without having to concern yourself with the underlying details of a particular database. 2 How many types of JDBC Drivers are present and what are they? Ans: There …

Java Lang Package Interview Questions 1 what is the base class of all classes? Ans: java.lang.Object 2 what do you think is the logic behind having a single base class for all classes? Ans: 1. casting 2. Hierarchial and object oriented structure. 3 why most of the Thread functionality is specified in Object Class? Ans: Basically for intertribal communication. 4 …

Applets Interview Questions 1 what is an Applet? Ans: Applet is a java program which is included in a html page and executes in java enabled client browser. Applets are used for creating dynamic and interactive web applications. 2 Explain the life cycle of an Applet? Ans: The following methods implement the life cycle of an Applet: Init: To initialize …

Java Garbage Collection Interview Questions 1 Explain Garbage collection in Java? Ans: In Java, Garbage Collection is automatic. Garbage Collector Thread runs as a low priority daemon thread freeing memory. 2 When does the Garbage Collection happen? Ans: When there is not enough memory. Or when the daemon GC thread gets a chance to run. 3 When is an Object …

Awt Swing Interview Questions 1 what is the difference between a Choice and a List? Ans: A Choice is displayed in a compact form that requires you to pull it down to see the list of available choices. Only one item may be selected from a Choice. A List may be displayed in such a way that several List items …

Java Threads Interview Questions 1 what are the two types of multitasking? Ans:a. Process-based. b. Thread-based. 2 what is a Thread? Ans: A thread is a single sequential flow of control within a program. 3 what are the two ways to create a new thread? Ans: A.Extend the Thread class and override the run () method. B.Implement the Runnable interface …

Java Exception Handling Interview Questions 1 which package contains exception handling related classes? Ans: java. Lang 2 what are the two types of Exceptions? Ans: Checked Exceptions and Unchecked Exceptions. 3 what is the base class of all exceptions? Ans: java.lang.Throwable 4 what is the difference between Exception and Error in java? Ans: Exception and Error are the subclasses of …