Here, we provide 30 MCQs on Introduction to Servlets in Java.
30 MCQs on Introduction to Servlets in Java
1. What is a Servlet in Java?
A. A type of coffee bean
B. A server-side Java program
C. A type of JavaScript code
D. A Java package
Answer: B
2. Which Java package provides classes and interfaces for servlets?
A. java.lang
B. javax.servlet
C. java.servlet
D. java.servlets
Answer: B
3. Which method is used to initialize a servlet?
A. init()
B. initialize()
C. start()
D. setup()
Answer: A
4. In a servlet, what does the doGet method typically handle?
A. HTTP POST requests
B. HTTP GET requests
C. HTTP DELETE requests
D. HTTP PUT requests
Answer: B
5. Which HTTP method is used to submit a form’s data to the server in a servlet?
A. GET
B. POST
C. PUT
D. DELETE
Answer: B
6. What is the purpose of the web.xml file in a servlet application?
A. To configure the database connection
B. To specify the servlet mapping and initialization parameters
C. To define the HTML layout of web pages
D. To store user session data
Answer: B
7. How can you retrieve a parameter value from a client request in a servlet?
A. Using getParameter() method
B. Using requestData() method
C. Using retrieveParameter() method
D. Using getRequestParameter() method
Answer: A
8. Which HTTP status code indicates a successful response in a servlet?
A. 200 OK
B. 404 Not Found
C. 500 Internal Server Error
D. 302 Found
Answer: A
9. What is the purpose of the ServletContext object in a servlet?
A. To store user session data
B. To access information about the server environment
C. To manage database connections
D. To send HTTP responses
Answer: B
10. What is the correct way to forward a request from one servlet to another in Java?
A. Using the response.forward() method
B. Using the request.redirect() method
C. Using the response.sendRedirect() method
D. Using the request.getRequestDispatcher().forward() method
Answer: D
11. Which method is used to destroy a servlet and release its resources?
A. close()
B. destroy()
C. stop()
D. dispose()
Answer: B
12. What is the default URL pattern for a servlet when no <url-pattern> is specified in the web.xml file?
A. /servlet
B. /default
C. /
D. /servlet/*
Answer: C
13. Which class is used to represent an HTTP response in a servlet?
A. HttpServletResponse
B. HttpRequest
C. HttpResponse
D. HttpRequestResponse
Answer: A
14. What is the purpose of the doPost method in a servlet?
A. To handle HTTP POST requests
B. To handle HTTP GET requests
C. To handle HTTP DELETE requests
D. To handle HTTP PUT requests
Answer: A
15. What is a session in the context of servlets?
A. A servlet configuration file
B. A server log file
C. A client-server communication channel
D. A way to track user interactions across multiple requests
Answer: D
16. Which method is used to send an HTTP response from a servlet to the client?
A. sendResponse()
B. write()
C. sendRedirect()
D. send()
Answer: B
17. What is the purpose of the @WebServlet annotation in Java servlets?
A. To specify the servlet’s URL pattern
B. To define the servlet’s methods
C. To configure database connections
D. To set session attributes
Answer: A
18. Which servlet interface provides methods for handling HTTP DELETE requests?
A. HttpServlet
B. GenericServlet
C. ServletRequest
D. ServletResponse
Answer: A
19. How can you include the content of another resource in a servlet response?
A. Using the include() method of HttpServletResponse
B. Using the include() method of HttpServletRequest
C. Using the addContent() method of HttpServletResponse
D. Using the addContent() method of HttpServletRequest
Answer: B
20. Which of the following is NOT a valid way to maintain session data in a servlet?
A. Cookies
B. URL Rewriting
C. HttpSession
D. ServletConfig
Answer: D
21. Which servlet container is a reference implementation of the Servlet API and JSP API?
A. Apache Tomcat
B. WebSphere
C. JBoss
D. GlassFish
Answer: A
22. What is the purpose of the ServletResponse interface in a servlet?
A. To provide methods for handling HTTP requests
B. To provide methods for handling database connections
C. To represent an HTTP response to be sent to the client
D. To configure servlet initialization parameters
Answer: C
23. Which method is called when a client disconnects during a servlet request?
A. doDisconnect()
B. disconnect()
C. destroy()
D. doGet()
Answer: C
24. What is the purpose of the setContentType() method in HttpServletResponse?
A. To set the HTTP status code
B. To specify the character encoding
C. To set the content type of the response
D. To close the response stream
Answer: C
25. Which of the following is NOT a valid attribute scope in a servlet application?
A. Application scope
B. Request scope
C. Session scope
D. Servlet scope
Answer: D
26. What does the following code snippet do in a servlet?
response.sendRedirect(“index.jsp”);
A. Forwards the request to “index.jsp”
B. Sends an HTTP response to the client with a 302 status code
C. Includes the content of “index.jsp” in the response
D. Redirects the client to “index.jsp”
Answer: D
27. Which of the following methods is called when a servlet is first loaded into memory?
A. init()
B. doGet()
C. service()
D. destroy()
Answer: A
28. What is the purpose of the getServletContext() method in a servlet?
A. To get the servlet’s configuration
B. To get the servlet’s URL pattern
C. To get the servlet’s context
D. To get the servlet’s session
Answer: C
29. Which of the following is a valid way to configure a servlet in the web.xml file?
A. <servlet-name>
B. <servlet-class>
C. <servlet-mapping>
D. <servlet-config>
Answer: C
30. In a servlet, what is the purpose of the ServletContextListener interface?
A. To handle HTTP requests
B. To initialize servlets
C. To manage session data
D. To listen for context initialization and destruction events
Answer: D
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