{"id":2674,"date":"2024-05-17T05:36:45","date_gmt":"2024-05-17T05:36:45","guid":{"rendered":"https:\/\/www.hirist.tech\/blog\/?p=2674"},"modified":"2025-12-29T11:24:59","modified_gmt":"2025-12-29T11:24:59","slug":"top-20-interview-questions-on-java-servlets","status":"publish","type":"post","link":"https:\/\/www.hirist.tech\/blog\/top-20-interview-questions-on-java-servlets\/","title":{"rendered":"Top 20+ Interview Questions On Java Servlets"},"content":{"rendered":"\n<p>Do you know where Java gets its simplicity in developing high-end web applications?&nbsp;<strong><em>The answer lies in Java servlets.&nbsp;<\/em><\/strong>Servlets are Java classes that extend&nbsp;the capabilities of servers&nbsp;to generate dynamic content for web applications.&nbsp;And, because servlets are fundamental to&nbsp;Java web development, interviewers often ask questions on this topic.&nbsp;That&#8217;s why we have prepared a list of the top 20+&nbsp;<strong>interview questions on Java servlets<\/strong>&nbsp;for you.<\/p>\n\n\n\n<p>By understanding these questions and learning how to answer them, you can feel more confident and improve your chances of succeeding.&nbsp;<\/p>\n\n\n\n<p>Here we go!<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.hirist.tech\/blog\/top-20-interview-questions-on-java-servlets\/#Interview_Questions_on_Java_Servlets_for_Freshers\" title=\"Interview Questions on Java Servlets for Freshers\">Interview Questions on Java Servlets for Freshers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.hirist.tech\/blog\/top-20-interview-questions-on-java-servlets\/#Interview_Questions_on_Java_Servlets_for_Experienced\" title=\"Interview Questions on Java Servlets for Experienced&nbsp;\">Interview Questions on Java Servlets for Experienced&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.hirist.tech\/blog\/top-20-interview-questions-on-java-servlets\/#Advanced_Java_JSP_Servlet_Interview_Questions\" title=\"Advanced Java JSP Servlet Interview Questions\">Advanced Java JSP Servlet Interview Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.hirist.tech\/blog\/top-20-interview-questions-on-java-servlets\/#Interview_Questions_for_JSP_and_Servlet_in_Java\" title=\"Interview Questions for JSP and Servlet in Java&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;\">Interview Questions for JSP and Servlet in Java&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.hirist.tech\/blog\/top-20-interview-questions-on-java-servlets\/#Wrapping_Up\" title=\"Wrapping Up\">Wrapping Up<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Interview_Questions_on_Java_Servlets_for_Freshers\"><\/span>Interview Questions on Java Servlets for Freshers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Here are some basic&nbsp;<strong>interview questions on Java servlets<\/strong>&nbsp;and their answers for freshers.&nbsp;<\/p>\n\n\n\n<ol>\n<li><strong>What is a servlet?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>A&nbsp;servlet&nbsp;is a Java class that runs on the server to handle client requests in web applications. It extends the functionality of servers by generating dynamic content.&nbsp;<\/p>\n\n\n\n<p>Servlets facilitate the processing of&nbsp;HTTP requests&nbsp;and enable the creation of interactive web applications by responding to client actions.<\/p>\n\n\n\n<ol start=\"2\">\n<li><strong>How do servlets differ from regular Java classes?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Servlets are special Java classes designed for server-side programming, whereas regular Java classes&nbsp;are used&nbsp;for general-purpose programming.<\/p>\n\n\n\n<ol start=\"3\">\n<li><strong>What is the purpose of a servlet container?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>A servlet container, like&nbsp;Apache Tomcat,&nbsp;is responsible for managing servlets, handling requests, and generating&nbsp;responses.<\/p>\n\n\n\n<ol start=\"4\">\n<li><strong>What is the doGet() method in a servlet?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>The&nbsp;doGet() method&nbsp;is used&nbsp;to handle&nbsp;HTTP GET requests sent by clients to the server.<\/p>\n\n\n\n<ol start=\"5\">\n<li><strong>What is a Cookie?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>A&nbsp;cookie&nbsp;is a small data snippet that persists across multiple client requests. It comprises a name, a single value, and optional attributes like comment, path, domain qualifiers, maximum age, and version number.<\/p>\n\n\n\n<ol start=\"6\">\n<li><strong>Explain the difference between forward() and sendRedirect() methods.<\/strong><\/li>\n<\/ol>\n\n\n\n<p>The forward() method forwards the request from one servlet to another servlet or JSP page on the server, whereas the&nbsp;sendRedirect() method sends a temporary redirect response to the client&#8217;s browser.<\/p>\n\n\n\n<ol start=\"7\">\n<li><strong>What is session tracking in servlets?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Session tracking&nbsp;is a mechanism&nbsp;used&nbsp;to maintain state information about a user&#8217;s interactions with a website across multiple requests, typically using HTTP session objects in servlets.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Interview_Questions_on_Java_Servlets_for_Experienced\"><\/span><strong>Interview Questions on Java Servlets for Experienced&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A list of important&nbsp;<strong>interview questions on Java servlets<\/strong>&nbsp;and their answers for experienced candidates.&nbsp;<\/p>\n\n\n\n<ol start=\"8\">\n<li><strong>What is the difference between HttpServlet and GenericServlet?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>HttpServlet&nbsp;is a subclass of GenericServlet that provides HTTP-specific functionality, such as handling HTTP requests and responses.&nbsp;GenericServlet&nbsp;is an abstract class that serves as a base for all servlets, including HttpServlet.<\/p>\n\n\n\n<ol start=\"9\">\n<li><strong>How do you handle form data in a servlet?&nbsp;<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Form data can be retrieved in a servlet using the request.getParameter() method to access individual form parameters. Alternatively, request.getParameterMap() can&nbsp;be used to&nbsp;retrieve a map of all form parameters.<\/p>\n\n\n\n<ol start=\"10\">\n<li><strong>Explain the servlet lifecycle.<\/strong><\/li>\n<\/ol>\n\n\n\n<p>The&nbsp;servlet lifecycle&nbsp;consists of several stages: initialization, service, and destruction. During initialization, the servlet is instantiated and initialized.&nbsp;<\/p>\n\n\n\n<p>In the service stage, the servlet handles client requests. Finally, during destruction, the servlet is destroyed and released from memory.<\/p>\n\n\n\n<ol start=\"11\">\n<li><strong>What is session management in servlets?&nbsp;<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Session management&nbsp;in servlets involves maintaining state information about client sessions across multiple requests.&nbsp;This&nbsp;can&nbsp;be achieved&nbsp;using HttpSession objects, which allow servlets to store and retrieve session-specific data.<\/p>\n\n\n\n<ol start=\"12\">\n<li><strong>What is the purpose of servlet filters?&nbsp;<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Servlet filters&nbsp;intercept incoming requests and responses to perform pre-processing or post-processing tasks, such as authentication, logging, or modifying request parameters.&nbsp;<\/p>\n\n\n\n<p>They provide a reusable mechanism for applying&nbsp;common&nbsp;functionality across multiple servlets.<\/p>\n\n\n\n<ol start=\"13\">\n<li><strong>What are the annotations used in Servlet 3?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>In&nbsp;Servlet 3.0, annotations&nbsp;are used&nbsp;for configuration instead of XML-based configuration. The&nbsp;main&nbsp;annotations used are:<\/p>\n\n\n\n<p>\u00b7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong>@WebServlet<\/strong>: Used to define a servlet class without&nbsp;the need for&nbsp;XML configuration.<\/p>\n\n\n\n<p>\u00b7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong>@WebFilter<\/strong>: Used to define a filter class without XML configuration.<\/p>\n\n\n\n<p>\u00b7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<strong>@WebListener<\/strong>: Used to define a listener class without XML configuration.<\/p>\n\n\n\n<ol start=\"14\">\n<li><strong>What is difference between Get and Post method?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>The main difference between the&nbsp;GET and POST&nbsp;methods&nbsp;lies in&nbsp;how data&nbsp;is transferred.&nbsp;<\/p>\n\n\n\n<p>GET sends data in the URL, visible to users and suitable for retrieving data.&nbsp;<\/p>\n\n\n\n<p>POST sends data in the request body, which is&nbsp;not visible and is suitable for sending sensitive or large data.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Advanced_Java_JSP_Servlet_Interview_Questions\"><\/span><strong>Advanced Java JSP Servlet Interview Questions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A list of advanced&nbsp;<strong>JSP servlet interview questions<\/strong>&nbsp;and their answers.&nbsp;<\/p>\n\n\n\n<ol start=\"15\">\n<li><strong>How do you handle exceptions in servlets?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Exceptions in servlets&nbsp;can be handled using try-catch blocks within the service() method or by configuring error-page elements in the web.xml deployment descriptor to specify error-handling servlets or JSP pages.<\/p>\n\n\n\n<pre class=\"wp-block-verse\"><strong>Also Read - <a href=\"https:\/\/www.hirist.tech\/blog\/top-25-exception-handling-questions-in-java-interview\/\" target=\"_blank\" rel=\"noreferrer noopener\">Top 25 Exception Handling Questions In Java Interview<\/a><\/strong><\/pre>\n\n\n\n<ol start=\"16\">\n<li><strong>Explain the MVC architecture and how it&nbsp;is implemented&nbsp;in servlets and JSP.<\/strong><\/li>\n<\/ol>\n\n\n\n<p>MVC (Model-View-Controller)&nbsp;architecture separates an application into three components:&nbsp;Model&nbsp;(data), View (user interface), and Controller (logic).&nbsp;<\/p>\n\n\n\n<p>In servlets and JSP, servlets act as controllers handling business logic, while JSP pages serve as views to display data retrieved by servlets from models.<\/p>\n\n\n\n<ol start=\"17\">\n<li><strong>What are the advantages of using custom tags in JSP?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Custom tags in JSP&nbsp;provide a way to&nbsp;encapsulate reusable pieces of code or functionality, promoting code reusability and maintainability.&nbsp;<\/p>\n\n\n\n<p>They allow developers to create their&nbsp;own&nbsp;tags to perform specific tasks, reducing code duplication and improving readability.<\/p>\n\n\n\n<ol start=\"18\">\n<li><strong>How do you handle session management in servlets and JSP?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Session management in servlets and JSP involves using HttpSession objects to maintain state information about client sessions across multiple requests.&nbsp;<\/p>\n\n\n\n<p>Session attributes can&nbsp;be set, retrieved, or invalidated to store and retrieve session-specific data throughout the user&#8217;s session.<\/p>\n\n\n\n<ol start=\"19\">\n<li><strong>What are the differences between cookies and session tracking in servlets and JSP?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Cookies are small&nbsp;pieces of&nbsp;data stored on the client&#8217;s browser, while session tracking in servlets and JSP involves storing session data on the server.&nbsp;<\/p>\n\n\n\n<p>Cookies have size limitations and can be disabled, whereas session tracking is more secure but requires server-side storage.<\/p>\n\n\n\n<pre class=\"wp-block-verse\"><strong>Also Read - <a href=\"https:\/\/www.hirist.tech\/blog\/top-20-java-jsp-interview-questions-and-answers\/\" target=\"_blank\" rel=\"noreferrer noopener\">Top 20 Java JSP Interview Questions and Answers<\/a><\/strong><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Interview_Questions_for_JSP_and_Servlet_in_Java\"><\/span><strong>Interview Questions for JSP and Servlet in Java&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Here are some important&nbsp;<strong>interview questions for JSP and servlet in Java<\/strong>, along with their answers.&nbsp;<\/p>\n\n\n\n<ol start=\"20\">\n<li><strong>What is the difference between JSP and Servlet?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>JSP (JavaServer Pages)&nbsp;is a technology used for creating dynamic web pages with HTML and Java code, while&nbsp;Servlet is a Java class used to extend server functionality to handle HTTP requests and generate dynamic content.<\/p>\n\n\n\n<ol start=\"21\">\n<li><strong>How do you pass data from a servlet to a JSP page?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Data can be passed from a servlet to a JSP page using a request.setAttribute() method and forwarding the request to the JSP page.<\/p>\n\n\n\n<ol start=\"22\">\n<li><strong>What is the difference between ServletContext and ServletConfig?<\/strong><\/li>\n<\/ol>\n\n\n\n<p>ServletContext&nbsp;represents the entire web application and&nbsp;is shared&nbsp;among all servlets&nbsp;within the application.&nbsp;ServletConfig, on the other hand, is specific to each servlet and provides configuration information for that servlet, such as initialization parameters defined in the deployment descriptor.<\/p>\n\n\n\n<ol start=\"23\">\n<li><strong>What is the purpose of the JSP implicit objects?<\/strong><\/li>\n<\/ol>\n\n\n\n<p><a href=\"https:\/\/www.javatpoint.com\/jsp-implicit-objects\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">JSP implicit objects<\/a>&nbsp;are predefined objects that are available within JSP pages without any declaration.&nbsp;<\/p>\n\n\n\n<p>They provide access to various elements of the JSP environment, such as request, response, session, application, out, and pageContext, simplifying JSP page development.<\/p>\n\n\n\n<pre class=\"wp-block-verse\"><strong>Also Read - <a href=\"https:\/\/www.hirist.tech\/blog\/top-25-frontend-interview-questions-and-answers\/\" target=\"_blank\" rel=\"noreferrer noopener\">Top 25+ Frontend Interview Questions and Answers<\/a><\/strong><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Wrapping_Up\"><\/span><strong>Wrapping Up<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>So, these are the top 15+&nbsp;<strong>interview questions on Java Servlets<\/strong>&nbsp;to help you prepare. Going through these questions will boost your confidence and increase your chances of success in landing your dream job.&nbsp;If you&#8217;re still on the lookout for <a href=\"https:\/\/www.hirist.tech\/k\/servlets-jobs.html\" target=\"_blank\" rel=\"noreferrer noopener\">job opportunities in Java Servlets<\/a> or any other IT field, consider checking out&nbsp;<a href=\"https:\/\/www.hirist.tech\/\">Hirist<\/a>. As India&#8217;s top IT job portal, it offers the latest and most authentic tech job listings. With the Hirist app installed on your smartphone, you can conveniently browse for jobs on the go.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Do you know where Java gets its simplicity in developing high-end web applications?&nbsp;The answer lies&hellip;<\/p>\n","protected":false},"author":1,"featured_media":2686,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,21,29,19],"tags":[32,34,33],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Top 20+ Interview Questions on Java Servlets (2026) | Hirist<\/title>\n<meta name=\"description\" content=\"A list of the 20+ most commonly asked interview questions on Java Servlets and their answers. 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