This blog provides 40 MCQs on Cookies and Session Management with Servlets.
Explore the world of web development with our comprehensive set of 40 multiple-choice questions on Cookies and Session Management with Servlets. These MCQs cover fundamental concepts, best practices, and advanced techniques to enhance your understanding of how cookies and session management work in Java servlets, a key aspect of web application development.
1. What is the purpose of using cookies in a Servlet application?
a. To store session data on the server
b. To store user data on the client side
c. To authenticate users
d. To store database connections
2. Which HTTP response header is used to set a cookie in a Servlet?
a. Set-Cookie
b. Cookie-Set
c. Create-Cookie
d. Set-Cookie-Header
3. Which class is used to represent a cookie in a Servlet?
a. Cookie
b. HttpCookie
c. WebCookie
d. ServletCookie
4. In a Servlet, how can you add a cookie to the response?
a. Using the addCookie method of HttpServletResponse
b. Using the setCookie method of HttpServletRequest
c. Using the addCookie method of HttpServletRequest
d. Using the setCookie method of HttpServletResponse
5. What is the maximum size of a cookie value in most browsers?
a. 2 KB
b. 4 KB
c. 8 KB
d. 16 KB
6. Which method of the Cookie class is used to set the maximum age of a cookie?
a. setMaxAge
b. setExpiration
c. setLifeSpan
d. setDuration
7. How can you delete a cookie in a Servlet?
a. Setting its max age to 0
b. Calling the removeCookie method
c. Using the deleteCookie method
d. Cookies cannot be deleted in a Servlet
8. What happens to a session cookie when the browser is closed?
a. It expires immediately
b. It persists until the session timeout
c. It persists for 24 hours
d. It persists indefinitely
9. Which mechanism is used to maintain session data between client and server in Servlets?
a. Cookies
b. URL rewriting
c. Session tracking
d. Web storage
10. How is session data stored on the server in a Servlet application?
a. In a text file on the server’s file system
b. In a database
c. In memory on the server
d. In a separate session server
11. What is the default session tracking mechanism in Servlets?
a. Cookies
b. URL rewriting
c. Hidden form fields
d. Session ID in the URL
12. Which object is used to represent a session in a Servlet?
a. HttpSession
b. ServletRequest
c. ServletResponse
d. HttpServletRequest
13. How do you obtain the session object in a Servlet?
a. request.getSession()
b. response.getSession()
c. session.getRequest()
d. session.getResponse()
14. Which method is used to invalidate a session in Servlets?
a. invalidateSession()
b. destroySession()
c. expireSession()
d. session.invalidate()
15. What is the purpose of session timeout in a Servlet session?
a. To specify when the session will be created
b. To specify when the session will expire if inactive
c. To specify the session ID
d. To specify the maximum session size
16. Which of the following is NOT a valid way to track sessions in Servlets?
a. Cookies
b. URL rewriting
c. Hidden form fields
d. HTTP headers
17. What happens when a user’s browser does not support cookies and URL rewriting is disabled?
a. Session tracking is not possible
b. Hidden form fields are used for session tracking
c. Cookies are forced to be enabled
d. HTTP headers are used for session tracking
18. Which attribute of a Cookie object is used to specify the path for which the cookie is valid?
a. cookiePath
b. path
c. cookieRoute
d. route
19. In a Servlet, what is the default session timeout period if not explicitly set?
a. 5 minutes
b. 15 minutes
c. 30 minutes
d. 60 minutes
20. Which of the following statements about sessions and cookies is true?
a. Cookies are always used to track sessions.
b. Sessions can be tracked without using cookies.
c. Cookies are only used for authentication.
d. Sessions are always stored on the client side.
21. In a Servlet, what method can you use to check if a session exists for a user?
a. sessionExists()
b. hasSession()
c. isNew()
d. getSession()
22. What is the primary purpose of URL rewriting for session tracking in Servlets?
a. To encrypt session data in the URL
b. To hide session data from the user
c. To add the session ID to URLs
d. To create shorter URLs
23. Which of the following is an example of URL rewriting for session tracking?
a. /servlet?sessionid=12345
b. /servlet;jsessionid=12345
c. /servlet?sid=12345
d. /servlet?token=12345
24. Which session tracking mechanism is considered more secure: cookies or URL rewriting?
a. Cookies
b. URL rewriting
c. Both are equally secure
d. Neither is secure
25. What is the role of the HttpSessionBindingListener interface in Servlets?
a. To listen for changes in session attributes
b. To listen for changes in request parameters
c. To listen for changes in cookies
d. To listen for changes in session timeout
26. Which of the following methods is called when an object is bound to an HttpSession in Servlets?
a. sessionBound()
b. valueBound()
c. sessionAdded()
d. attributeBound()
27. What is the default name of the session cookie in a Java Servlet application?
a. JSESSION
b. SESSIONID
c. SESSION
d. SERVLET_SESSION
28. In a Servlet, how can you set a cookie with a specific domain?
a. Using the setDomain method of the Cookie class
b. Using the setDomain method of the HttpServletResponse class
c. Using the setCookieDomain method of the HttpServletRequest class
d. Domains cannot be set for cookies in Servlets
29. What is the scope of session data in a Servlet application?
a. Application-wide
b. Request-wide
c. Session-wide
d. Page-wide
30. Which of the following is a valid method to retrieve a cookie in a Servlet?
a. request.getCookie()
b. request.getCookies()
c. request.getHeader()
d. request.getParameter()
31. How can you prevent session fixation attacks in a Servlet application?
a. Use secure cookies
b. Regenerate session IDs after login
c. Store session data on the client side
d. Disable session tracking
32. Which session tracking mechanism can be used when cookies are disabled in the browser?
a. URL rewriting
b. Hidden form fields
c. Session tokens
d. None of the above
33. What is the purpose of the HttpSessionAttributeListener interface in Servlets?
a. To listen for changes in session attributes
b. To listen for changes in request parameters
c. To listen for changes in cookies
d. To listen for changes in session timeout
34. Which of the following methods is called when an attribute is removed from an HttpSession in Servlets?
a. sessionRemoved()
b. attributeRemoved()
c. sessionAttributeRemoved()
d. attributeDeleted()
35. What is the default behaviour of a session when a user closes their browser in a Servlet application?
a. The session expires immediately.
b. The session remains active indefinitely.
c. The session remains active until the server is restarted.
d. The session remains active for the duration specified in web.xml.
36. Which HTTP method is typically used to send session data to the server in a Servlet application?
a. GET
b. POST
c. PUT
d. DELETE
37. In a Servlet, which method is used to retrieve the session ID of a client?
a. getSessionID()
b. getSession().getId()
c. request.getSessionID()
d. request.getSession().getId()
38. Which of the following is NOT a valid way to store session data in a Servlet?
a. Cookies
b. Session attributes
c. URL rewriting
d. HTTP headers
39. What is the purpose of the HttpSessionListener interface in Servlets?
a. To listen for changes in session attributes
b. To listen for changes in request parameters
c. To listen for changes in cookies
d. To listen for session creation and destruction events
40. Which method is called when a session is destroyed in a Servlet application?
a. sessionDestroyed()
b. destroyedSession()
c. sessionExpired()
d. invalidateSession()
Answers
1. What is the purpose of using cookies in a Servlet application?
Answer: b. To store user data on the client side
2. Which HTTP response header is used to set a cookie in a Servlet?
Answer: a. Set-Cookie
3. Which class is used to represent a cookie in a Servlet?
Answer: a. Cookie
4. In a Servlet, how can you add a cookie to the response?
Answer: a. Using the addCookie method of HttpServletResponse
5. What is the maximum size of a cookie value in most browsers?
Answer: b. 4 KB
6. Which method of the Cookie class is used to set the maximum age of a cookie?
Answer: a. setMaxAge
7. How can you delete a cookie in a Servlet?
Answer: a. Setting its max age to 0
8. What happens to a session cookie when the browser is closed?
Answer: b. It persists until the session timeout
9. Which mechanism is used to maintain session data between client and server in Servlets?
Answer: c. Session tracking
10. How is session data stored on the server in a Servlet application?
Answer: c. In memory on the server
11. What is the default session tracking mechanism in Servlets?
Answer: a. Cookies
12. Which object is used to represent a session in a Servlet?
Answer: a. HttpSession
13. How do you obtain the session object in a Servlet?
Answer: a. request.getSession()
14. Which method is used to invalidate a session in Servlets?
Answer: d. session.invalidate()
15. What is the purpose of session timeout in a Servlet session?
Answer: b. To specify when the session will expire if inactive
16. Which of the following is NOT a valid way to track sessions in Servlets?
Answer: d. HTTP headers
17. What happens when a user’s browser does not support cookies and URL rewriting is disabled?
Answer: b. Hidden form fields are used for session tracking
18. Which attribute of a Cookie object is used to specify the path for which the cookie is valid?
Answer: b. path
19. In a Servlet, what is the default session timeout period if not explicitly set?
Answer: c. 30 minutes
20. Which of the following statements about sessions and cookies is true?
Answer: b. Sessions can be tracked without using cookies.
21. In a Servlet, what method can you use to check if a session exists for a user?
Answer: c. isNew()
22. What is the primary purpose of URL rewriting for session tracking in Servlets?
Answer: c. To add the session ID to URLs
23. Which of the following is an example of URL rewriting for session tracking?
Answer: b. /servlet;jsessionid=12345
24. Which session tracking mechanism is considered more secure: cookies or URL rewriting?
Answer: a. Cookies
25. What is the role of the HttpSessionBindingListener interface in Servlets?
Answer: a. To listen for changes in session attributes
26. Which of the following methods is called when an object is bound to an HttpSession in Servlets?
Answer: b. attributeAdded()
27. What is the default name of the session cookie in a Java Servlet application?
Answer: a. JSESSION
28. In a Servlet, how can you set a cookie with a specific domain?
Answer: a. Using the setDomain method of the Cookie class
29. What is the scope of session data in a Servlet application?
Answer: c. Session-wide
30. Which of the following is NOT a valid method to retrieve a cookie in a Servlet?
Answer: b. request.getCookies()
31. How can you prevent session fixation attacks in a Servlet application?
Answer: b. Regenerate session IDs after login
32. Which session tracking mechanism can be used when cookies are disabled in the browser?
Answer: b. Hidden form fields
33. What is the purpose of the HttpSessionAttributeListener interface in Servlets?
Answer: a. To listen for changes in session attributes
34. Which of the following methods is called when an attribute is removed from an HttpSession in Servlets?
Answer: b. attributeRemoved()
35. What is the default behavior of a session when a user closes their browser in a Servlet application?
Answer: a. The session expires immediately.
36. Which HTTP method is typically used to send session data to the server in a Servlet application?
Answer: b. POST
37. In a Servlet, which method is used to retrieve the session ID of a client?
Answer: d. request.getSession().getId()
38. Which of the following is NOT a valid way to store session data in a Servlet?
Answer: d. HTTP headers
39. What is the purpose of the HttpSessionListener interface in Servlets?
Answer: d. To listen for session creation and destruction events
40. Which method is called when a session is destroyed in a Servlet application?
Answer: a. sessionDestroyed()
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