To manage memory efficiently during file upload, a streaming approach is recommended, allowing the servlet to process the file in chunks rather than loading the entire file into memory.

Developers often use authentication combined with authorization to secure a servlet. Authentication verifies the user's identity, while authorization determines the user's access rights.

The logout() method is essential for managing user logouts in secure web applications. It typically involves invalidating the user's session to ensure they are logged out securely.

Role-based authorization in servlets is often implemented using the web.xml descriptor, where roles and corresponding access rights are defined to control access to servlet resources based on user roles.

A servlet filter plays a crucial role in security by processing security policies. It can inspect and manipulate both the request and response to enforce security measures before reaching the servlet.

Role-based access control in servlets can be implemented using declarative security, where roles are defined in the deployment descriptor (web.xml) and associated with specific resources or operations.

Session hijacking is typically prevented in a servlet-based application by using HTTPS to secure communication between the client and the server, encrypting the session data to prevent unauthorized access.

In servlets, the SSL/TLS mechanism is used to encrypt data transmitted over the network, providing a secure communication channel.

The Java EE Security API is used for declarative security in web applications, allowing developers to specify security constraints.

A secure servlet session is typically identified through a unique session ID assigned to each user during their session.