A servlet is configured to allow only specific file types for upload. What strategies should be implemented to ensure this?
- Rely on the web browser for file type validation
- Use a third-party library for file type validation
- Validate file types on the client side
- Validate file types on the server side
Validating file types on the server side is a more secure approach to ensure that only specific file types are allowed for upload. Relying solely on client-side validation can be bypassed, so it's not recommended. Using a third-party library can also provide robust validation.
To manage memory efficiently during file upload, using a __________ approach is recommended.
- buffering
- random access
- sequential
- streaming
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.
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.
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.
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.
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.
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.
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.
How is session hijacking typically prevented in a servlet-based application?
- By disabling session tracking
- By increasing session timeout
- Using HTTPS
- Using servlet filters
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.
How can a servlet implement role-based access control?
- By configuring web.xml
- By modifying the servlet container source code
- Using declarative security
- Using programmatic security
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.
What is the role of a servlet filter in security?
- Handle HTTP Requests
- Manage Database Connections
- Manipulate Session Attributes
- Process Security Policies
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.
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.