The method __________ of the HttpServletRequest is used to read binary data from a form input.
- getBinaryData()
- getInputStream()
- readBinaryData()
- readFormData()
The getInputStream() method of the HttpServletRequest is used to read binary data from a form input.
To prevent character encoding issues when reading form data, the method __________ should be called before any getParameter methods.
- encodeCharacters
- handleEncoding
- resolveCharacterIssues
- setCharacterEncoding
To prevent character encoding issues when reading form data, the setCharacterEncoding method should be called before any getParameter methods. This ensures correct interpretation of characters in the form data.
How does session tracking differ between stateless and stateful protocols?
- Stateful: Lightweight
- Stateful: Stores client state
- Stateless: No memory of previous requests
- Stateless: Uses cookies
Stateless protocols, like HTTP, have no memory of previous requests, while stateful protocols, like HTTPS, store client state, allowing continuity across multiple requests.
What method of the HttpServletRequest object is used to retrieve a form parameter by name?
- fetchParameter(String name)
- getFormParameter(String name)
- getParameter(String name)
- retrieveParameter(String name)
The getParameter(String name) method is used to retrieve a form parameter by name from the HttpServletRequest object.
Which method is used to retrieve a servlet's initialization parameter in the servlet code?
- getInitParam()
- getServletConfig().getInitParameter()
- getServletContext().getInitParam()
- request.getParameter()
The method getServletConfig().getInitParameter() is used to retrieve a servlet's initialization parameter in the servlet code.
How does the HttpSession interface facilitate session tracking?
- It allows direct manipulation of the HTTP response.
- It enables the creation and management of sessions.
- It is responsible for URL rewriting in session tracking.
- It provides methods to manipulate cookies.
The HttpSession interface in servlets facilitates session tracking by enabling the creation and management of sessions. It provides methods to store, retrieve, and manage session attributes for a particular client.
How does cookie-based session tracking work in servlets?
- Cookies are not used for session tracking in servlets.
- Cookies are used only for authentication in servlets.
- Cookies are used to store session information on the client side.
- Cookies are used to store session information on the server side.
Cookie-based session tracking in servlets involves storing session information on the client side using cookies. This allows the server to recognize and associate subsequent requests with the same session.
What technology is typically used for writing presentation logic in web applications?
- Applet
- JSP
- JavaBean
- Servlet
JavaServer Pages (JSP) is typically used for writing presentation logic in web applications, allowing Java code to be embedded into HTML for dynamic content generation.
If a servlet needs to log application-wide events, which object would be the best choice for retrieving the log file’s path?
- HttpServletRequest
- HttpServletResponse
- ServletConfig
- ServletContext
The ServletContext provides a way to retrieve information that is shared among servlets, making it suitable for obtaining the log file's path for application-wide event logging.
A servlet is loaded at startup, processes several requests, and then is removed from the server. Identify the correct order of method invocations in its lifecycle.
- destroy() -> service() -> init()
- init() -> destroy() -> service()
- init() -> service() -> destroy()
- service() -> init() -> destroy()
The correct order of method invocations in the lifecycle of a servlet is init() (initialization) -> service() (processing requests) -> destroy() (removal from the server).
Which Java method is used to add a cookie to the response object?
- addCookie()
- createCookie()
- insertCookie()
- setCookie()
The addCookie() method is used in Java to add a cookie to the response object and send it to the client.
How does an HTTP servlet handle multipart/form-data requests?
- It accesses the data using request.getParts() method.
- It employs the request.getInputStream() method.
- It uses the HttpServletRequest.getParameter() method.
- It utilizes the MultipartRequest class.
Handling multipart/form-data requests in an HTTP servlet involves using the request.getParts() method to access the various parts of the request, allowing extraction of file uploads and other data.