DEVELOPING SERVLET

How to arrange servlet file to run in browser

• Rename the servlet file to .html extension and try to run it in the browser
• Email the servlet file to yourself and open the attachment in the browser
• Save the servlet file as a .txt file and open it directly in the browser
• Compile the servlet file into a .class file, deploy it on a web server like Apache Tomcat, and access it through a URL in the browser.

Construct the servlet file to handle the client request.

• Use a JSP file instead of a servlet to handle the client request.
• Create a servlet file by extending HttpRequest and implementing the necessary logic inside the service() method.
• Create a servlet file by extending HttpServlet and implementing the necessary logic inside the doGet() or doPost() method.
• Write the servlet file in JavaScript instead of Java.

Explain data validation in dynamic web pages

• Data validation ensures that user input is not processed by the application
• Data validation is the process of encrypting user input in dynamic web pages
• Data validation in dynamic web pages is the process of ensuring that user input is clean, correct, and useful before it is processed by the application.
• Data validation in dynamic web pages is only necessary for static content

What are the key points to consider for form validation in a Java web application?

• Front-end validation only
• Client-side validation, Server-side validation, Error handling, Validation of required fields, data formats, lengths, and ranges, XSS and SQL injection prevention
• Ignoring validation altogether
• Allowing unrestricted user input

Why is it not recommended to validate the form both on the client-side and server-side?

• Client-side validation is faster
• Client-side validation can be bypassed, leading to security vulnerabilities.
• Server-side validation is not secure
• Server-side validation is prone to errors

Why is form validation important in web applications?

• To make the form look more colorful
• To ensure data accuracy, completeness, and security.
• To slow down the website loading time
• To confuse users with unnecessary steps

How can developers set response headers in Java Servlets?

• response.setResponseHeader("headerName", "headerValue");
• response.setHeader("headerName", "headerValue");

• response.addHeader("headerName", "headerValue");
• response.setHeaderValue("headerName", "headerValue");

What method is used to send a redirect response in Java Servlets or JSP?

• HttpServletResponse.forward()
• HttpServletResponse.writeRedirect()
• HttpServletResponse.sendRedirect()
• HttpServletResponse.sendResponse()

All answer is LifeCycleServlet except...

• init()

• service()

• destroy()

• doGet()

What is different between doGet() and doPost() method?

• doGet() is used to send data to the server, while doPost() is used to retrieve data from the server.

• doGet() requests can be bookmarked, while doPost() requests cannot be bookmarked.

• doGet() requests have no size limitations, while doPost() requests have size limitations.

• doGet() requests are encrypted, while doPost() requests are not encrypted.