In servlets, the _________ mechanism is used to encrypt data transmitted over the network.
- HTTP
- HTTPS
- SSL/TLS
- TCP
In servlets, the SSL/TLS mechanism is used to encrypt data transmitted over the network, providing a secure communication channel.
The __________ API in Java EE is used for declarative security in web applications.
- Java EE Security
- Java Security
- Servlet Security
- Web Security
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 _________.
- URL parameter
- authentication token
- cookie
- session ID
A secure servlet session is typically identified through a unique session ID assigned to each user during their session.
To secure a servlet, developers often use _________ combined with _________ to restrict access.
- authentication, authorization
- encryption, decryption
- firewalls, intrusion detection
- session management, cryptography
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 __________ method is essential for managing user logouts in secure web applications.
- closeSession(), terminate()
- destroySession()
- endSession(), finalize()
- logout()
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 _________ descriptor.
- authorization.xml
- roles.xml
- servlet.xml
- web.xml
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.
For an application that needs to authenticate users based on roles, what is the best approach to implement this in servlets?
- Container-Managed Security
- Custom Authentication Logic
- Database Authentication
- SSL Authentication
The best approach for implementing user authentication based on roles in servlets is to use Container-Managed Security, which is configured in the deployment descriptor (web.xml) and utilizes the container's security mechanisms.
How should an HTTP servlet respond to a request with an If-Modified-Since header older than the content's last modification date?
- Return a 200 OK response with the updated content
- Return a 304 Not Modified response
- Return a 403 Forbidden response
- Return a 500 Internal Server Error response
If the If-Modified-Since header indicates that the content hasn't been modified since the provided date, the servlet should return a 304 Not Modified response to indicate that the client's cached copy is still valid.
A web application requires users to log in for access. Which servlet feature should be implemented for this requirement?
- Filter
- HttpSession
- RequestDispatcher
- ServletContext
The HttpSession feature in servlets is commonly used for session management, allowing the tracking and management of user sessions, which is essential for implementing user logins in web applications.
In a scenario where sensitive data is transmitted, which protocol should a servlet use to ensure data security?
- FTP
- HTTP
- HTTPS
- SMTP
For transmitting sensitive data, such as during user logins, servlets should use HTTPS (HTTP Secure) to ensure data security through encryption.