How can you implement singleton pattern in servlets ?

How can you implement singleton pattern in servlets ?,Java, C ,C++, ASP, ASP.net C# ,Struts ,Questions & Answer, Struts2, Ajax, Hibernate, Swing ,JSP , Servlet, J2EE ,Core Java ,Stping, VC++, HTML, DHTML, JAVASCRIPT, VB ,CSS, interview ,questions, and answers, for,experienced, and fresher

Singleton is a useful Design Pattern for allowing only one instance of your class. you can implement singleton pattern in servlets by using using Servlet init() and <load-on-startup> in the deployment descriptor.</load-on-startup>

More interview questions and answers
Is JSP extensible ?
What is the difference between <%@ include ...> (directive include) and ?
Can I just abort processing a JSP?
What are the parameters for service method ?
How do I prevent the output of my JSP or Servlet pages from being cached by the browser?
How to refer the \"this\" variable within a JSP page?
Can we implement an interface in JSP ?
How do I use a scriptlet to initialize a newly instantiated bean?
What are JSP Actions?
What is the difference between ServletContext and ServletConfig?
What is a Hidden Comment?
How to pass information from JSP to included JSP?
How do you pass data (including JavaBeans) to a JSP from a servlet?
How can I set a cookie?
How will you delete a cookie?
What JSP lifecycle methods we can override?
How will you include a static file in a JSP page?
How you can perform browser redirection?
Can we use ServletOutputStream object from a JSP page?
How can I invoke a JSP error page from a servlet?
How can I enable session tracking for JSP pages if the browser has disabled cookies?
How can you declare methods in your JSP page?
How can we set the inactivity period on a per-session basis?
How do you pass an init parameter to a JSP?
How can my application get to know when a HttpSession is removed?
How many cookies can one set in the response object of the servlet? Also, are there any restrictions on the size of cookies?
When a session object gets added or removed to the session, which event will get notified ?
What is URL Encoding and URL Decoding ?
What is the difference between an applet and a servlet?
What are the different web servers available name few of them?
What are the different types of ServletEngines?
What is a Session Id?
What is the use of setComment and getComment methods in Cookies ?
Why we are used setMaxAge() and getMaxAge() in Cookies ?
What is the use of setSecure() and getSecure() in Cookies ?
Is HTML page a web component?
What is the container?
What is deployment descriptor?
How can I print the stack trace of an exception from a JSP page?
Do objects stored in a HTTP Session need to be serializable? Or can it store any object?
What is the differecnce between JspWriter and PrintWriter?
How can you implement singleton pattern in servlets ?
What is the difference between an application server and a web server?
Can we implement Runnable interface from within our servlet?
Can a main() method of class be invoked in another class?
What is the difference between java command line arguments and C command line arguments?
What is the difference between == & .equals()?
What is the difference between abstract class & Interface?
What is use of static, final variable?
Examples of final class.
What is a java bean?
What is use of synchronized keyword?
What is reflect package used for & the methods of it?
What is use of serialization?
Can methods be overloaded based on the return types ?
Why do we need a finalize() method when Garbage Collection is there ?
Difference between AWT and Swing components ?
Is there any heavy weight component in Swings ?
What are the methods in Applet ?
When is init(), start() called ?
What is Exception ?
What are the ways you can handle exception ?
What is finally method in Exceptions ?
What are the types of access modifiers ?
What are the other modifiers in java ?
Is synchronized modifier ?
What is meant by polymorphism ?
What is inheritance ?
What is method Overloading ?
What is method Overriding ?
Does java support multi dimensional arrays ?
Is multiple inheritance used in Java ?
Is there any tool in java that can create reports ?
What is meant by Java ?
What is meant by a class ?
What is meant by a method ?
What are the OOPS concepts in Java ?
What is meant by encapsulation ? Explain with an example.
What is meant by inheritance ? Explain with an example.
What is mean by JVM ?
What is meant by identifiers ?
What are the different types of modifiers ?
What are the primitive data types in Java ?
What is mean by a wrapper class ?
What is Garbage collection ?
What is mean by final class, methods and variables ?
What is mean by interface ?
What is the difference between an array and a vector ?
What is singleton class ?
What is constructor ?
What is casting ?
What is the difference between final, finally and finalize ?
What is mean by packages in java?
Name 5 calsses you have used ?
Name 2 classes that can store arbitrary number of objects ?
What is the difference between java.applet.* and java.applet.Applet ?
What is a default package ?
What is anonymous class ?
What is the use of an interface ?
What is a serializable interface ?