Wells Farg interview questions and answers - Wikitechy https://www.wikitechy.com/interview-questions/tag/wells-farg-interview-questions-and-answers/ Interview Questions Fri, 17 Sep 2021 10:27:05 +0000 en-US hourly 1 https://wordpress.org/?v=6.9 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png Wells Farg interview questions and answers - Wikitechy https://www.wikitechy.com/interview-questions/tag/wells-farg-interview-questions-and-answers/ 32 32 What is the error message that you would get if you try to assign “Null” to an integer variable ? https://www.wikitechy.com/interview-questions/visual-basic/what-is-the-error-message-that-you-would-get-if-you-try-to-assign-null-to-an-integer-variable/ https://www.wikitechy.com/interview-questions/visual-basic/what-is-the-error-message-that-you-would-get-if-you-try-to-assign-null-to-an-integer-variable/#respond Thu, 22 Jul 2021 07:48:17 +0000 https://www.wikitechy.com/interview-questions/?p=1216

What is the error message that you would get if you try to assign “Null” to an integer variable ?

  • Error message : Cannot convert null to int because it is a non-nullable value type(or) INVALID use of NULL.
]]> https://www.wikitechy.com/interview-questions/visual-basic/what-is-the-error-message-that-you-would-get-if-you-try-to-assign-null-to-an-integer-variable/feed/ 0 Can we define constructor in Servlet class ? https://www.wikitechy.com/interview-questions/java-servlet/can-we-define-constructor-in-servlet-class/ https://www.wikitechy.com/interview-questions/java-servlet/can-we-define-constructor-in-servlet-class/#respond Mon, 19 Jul 2021 12:55:03 +0000 https://www.wikitechy.com/interview-questions/?p=1053

Can we define constructor in Servlet class ?

  • Yes, we can define constructor in Servlet class.
  • Constructor may be a Default Constructor or Parameterised Constructor. If we didn’t write any constructor then the default constructor will be executed. Because, to read init parameters of a servlet we need servlet config object in the life cycle of the servlet.
  • Servlet config object is created after the execution of the constructor.

Servlet Constructor

Sample Code

import javax.servlet.http.*;
import java.io.*;

public class ConstructorServlet extends HttpServlet
{
  String str1, str2, str3;
  public ConstructorServlet()
  {
    str1 = "Constructor";
  }
  public void init()
  {
    str2 = "init() method";
  }
  public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();

    str3 = " service() method";

    out.println("<h3>"+ str1 + "<br>" + str2 + "<br>" + str3 + "</h3>"); 
    out.close();
  }
}

Output

 Constructor
    init() method
    service() method
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