Reference

Yes. A java private member cannot be inherited as it is available only to the declared java class. Since the private members cannot be inher...

A static java inner class cannot have instances. A non-static java inner class can have instances that belong to the outer class.

A java variable can be declared using the keyword final. Then the final variable can be assigned only once. A variable that is declared as ...

Java marker interface has no members in it. Marker interface ‘was’ used as a tag to inform a message to the java compiler. Java Marker Inte...

Finalization is to give an unreachable Java object the opportunity to perform any cleanup processing before the Java object is garbage colle...

The finally clause in the try-catch exeception block always executes, irrespective of the occurence of exeception. This is applicable for th...

Yes. It can happen when the Java object’s finalize() method is invoked and the Java object performs an operation which causes it to become a...

Type of exceptions in java are checked exceptions and unchecked exceptions. This classification is based on compile-time checking of excepti...

Pass by value in java means passing a copy of the value to be passed. Pass by reference in java means the passing the address itself. In Jav...

An adapter helps two incompatible interfaces to work together. This is the real world definition for an adapter. Adapter design pattern is u...

A factory method pattern is a creational pattern. It is used to instantiate an object from one among a set of classes based on a logic. Ass...

A filter is used to dynamically intercept request and response objects and change or use the data present in them. Filters should be configu...

The interface javax.servlet.Servlet defines the following three methods known as servlet life cycle methods.  public void init(ServletConfi...

Technically you can define constructors in servlet. But, the declared constructor cannot access the ServletConfig object or throw a ServletE...

ServletRequest and ServletResponse are two interfaces that serve as the backbone of servlet technology implementation. They belong to the ja...

request.getRequestDispatcher(“url”) means the dispatch is relative to the current HTTP request. Example code: RequestDispatcher reqDispObj ...

Signature: public interface ServletConfig ServletConfig is implemented by the servlet container to initialize a single servlet using init(...

In the java servlet life cycle, the first phase is called ‘Creation and intialization’. The java servlet container first creates the servle...

javax.servlet.GenericServlet Signature: public abstract class GenericServlet extends java.lang.Object implements Servlet, ServletConfig, jav...

Servlet mapping specifies the web container of which java servlet should be invoked for a url given by client. It maps url patterns to servl...

Servlet mapping specifies the web container of which java servlet should be invoked for a url given by client. It maps url patterns to servl...

The root cause of IllegalStateException exception is a java servlet is attempting to write to the output stream (response) after the respons...

destroy() gets executed and the initialization process continues. It is a trick question in servlets interview. In java servlet, destroy() ...

Following answer is applicable irrespective of the language and platform used. Before we enter into session tracking, following things shou...

getServletConfig().getServletContext().getRequestDispatcher(“jspfilepathtoforward”).forward(request, response); The above line is essence o...