Servlets Interview Questions

1. In which file do we define a servlet mapping ?

A. web.xml

B. servlet.mappings

C. servlet.xml

D. Simple.java

Correct Answer is : web.xml

2. which of the following URLs will correctly request the Servlet ?

A. http://www.mywebapp.com/secureapp/Login?name="bob"

B. http://www.mywebapp.com/Login?name="bob"

C. http://www.mywebapp.com/secureapp/doLogin?name="bob"

D. http://www.mywebapp.com/secureapp/do/Login?name="bob"

Correct Answer is : http://www.mywebapp.com/secureapp/do/Login?name="bob"

3. Servlets and JavaServer Pages have become so popular that they are now supported directly or with third-party plug-ins by most major Web servers and application servers.

A. TRUE

B. FALSE

C. Can't say

D. None of these

Correct Answer is : TRUE

4. All servlets must implement the Servlet interface of package:

A. java.servlet

B. javax.servlet

C. .servlet

D. All are same

Correct Answer is : javax.servlet

5. A get request gets information from a client. A post request posts data to a client.

A. TRUE

B. FALSE

C. Not always

D. None of these

Correct Answer is : FALSE

6. How constructor can be used for a servlet?

A. Initialization

B. Constructor function

C. Initialization and Constructor function

D. Setup() method

Correct Answer is : Initialization and Constructor function

7. Can servlet class declare constructor with ServletConfig object as an argument?

A. TRUE

B. FALSE

C.

D.

Correct Answer is : FALSE

8. Which of the following code is used to get an attribute in a HTTP Session object in servlets?

A. session.getAttribute(String name)

B. session.alterAttribute(String name)

C. session.updateAttribute(String name)

D. session.setAttribute(String name)

Correct Answer is : session.getAttribute(String name)

9. Which method is used to get three-letter abbreviation for locale’s country in servlets?

A. Request.getISO3Country()

B. Locale.getISO3Country()

C. Response.getISO3Country()

D. Local.retrieveISO3Country()

Correct Answer is : Request.getISO3Country()

10. Which of the following code retrieves the body of the request as binary data?

A. DataInputStream data = new InputStream()

B. DataInputStream data = response.getInputStream()

C. DataInputStream data = request.getInputStream()

D. DataInputStream data = request.fetchInputStream()

Correct Answer is : DataInputStream data = request.getInputStream()

11. When destroy() method of a filter is called?

A. The destroy() method is called only once at the end of the life cycle of a filter

B. The destroy() method is called after the filter has executed doFilter method

C. The destroy() method is called only once at the begining of the life cycle of a filter

D. The destroyer() method is called after the filter has executed

Correct Answer is : The destroy() method is called only once at the end of the life cycle of a filter

12. Which of the following is true about servlets?

A. Servlets execute within the address space of web server

B. Servlets are platform-independent because they are written in java

C. Servlets can use the full functionality of the Java class libraries

D. Servlets execute within the address space of web server, platform independent and uses the functionality of java class libraries

Correct Answer is : Servlets execute within the address space of web server, platform independent and uses the functionality of java class libraries

13. How is the dynamic interception of requests and responses to transform the information done?

A. servlet container

B. servlet config

C. servlet context

D. servlet filter

Correct Answer is : servlet filter

14. Which are the session tracking techniques? i. URL rewriting ii. Using session object iii.Using response object iv. Using hidden fields v. Using cookies vi. Using servlet object

A. i, ii, iii, vi

B. i, ii, iv, v

C. i, vi, iii, v

D. i, ii, iii, v

Correct Answer is : i, ii, iv, v

15. What is the difference between servlets and applets? i.Servlets execute on Server; Applets execute on browser ii.Servlets have no GUI; Applet has GUI iii.Servlets creates static web pages; Applets creates dynamic web pages iv.Servlets can handle only a single request; Applet can handle multiple requests

A. i,ii,iii are correct

B. i,ii are correct

C. i,iii are correct

D. i,ii,iii,iv are correct

Correct Answer is : i,ii are correct

Servlets interview questions