Servlets - Online Quiz
Following quiz provides Multiple Choice Questions (MCQs) related to Servlets Framework. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Q 1 - Which of the following is true about service() method of servlet?
Answer : D
Explaination
The servlet container (i.e. web server) calls the service() method to handle requests coming from the client( browsers) and to write the formatted response back to the client. Each time the server receives a request for a servlet, the server spawns a new thread and calls service. The service() method checks the HTTP request type (GET, POST, PUT, DELETE, etc.) and calls doGet, doPost, doPut, doDelete, etc. methods as appropriate.
Q 2 - What is javax.servlet.http.HttpServlet?
Answer : B
Explaination
javax.servlet.http.HttpServlet is an abstract class.
Q 3 - Which of the following code retrieves the name of the authentication scheme?
Answer : C
Explaination
request.getAuthType() returns the name of the authentication scheme used to protect the servlet, for example, BASIC or SSL or null if the JSP was not protected.
Q 4 - Which of the following code retrieves the request header?
A - Header.getHeaderName(headerName)
B - response.getHeader(headerName)()
Answer : C
Explaination
request.getHeader(headerName) returns the value of the specified request header as a String.
Q 5 - Which of the following code checks whether this request was made using a secure channel, such as HTTPS?
Answer : B
Explaination
request.isSecure() returns a boolean indicating whether this request was made using a secure channel, such as HTTPS.
Q 6 - Which of the following code can be used to write a cookie?
Answer : B
Explaination
response.addCookie(cookie) adds the specified cookie to the response and can be used to write a cookie.
Q 7 - When init() method of filter gets called?
B - The init() method is called whenever the servlet being filtered is invoked.
Answer : A
Explaination
The init method is designed to be called only once. It is called by the web container to indicate to a filter that it is being placed into service.
Q 8 - Which of the following is true about init() method of filter?
B - The init() method is not called again and again for each user request.
Answer : C
Explaination
The init method is designed to be called only once. It is called when the filter is first created, and not called again for each user request. It simply creates or loads some data that will be used throughout the life of the filter.
Q 9 - Which of the following code sends a cookie in servlet?
A - response.addCookie(cookie);
B - response.sendCookie(cookie);
Answer : A
Explaination
response.addCookie(cookie) adds cookies in the HTTP response header.
Q 10 - Which of the following code is used to set the session timeout in servlets?
A - session.setMaxInactiveInterval(interval)
B - response.setMaxInactiveInterval(interval)
Answer : A
Explaination
You can call public void setMaxInactiveInterval(int interval) method of session to set the timeout for a session individually.
