In CodeIgniter, how can you extend the functionalities of a third-party library without modifying its core files?
- Copy and paste the relevant code from the library and modify it directly
- Extend the library by creating a new class that inherits from the library's class
- Use hooks and events provided by CodeIgniter
- Write a separate helper function that overrides the library's functions
CodeIgniter provides a powerful feature called hooks, which allows you to extend the functionalities of a third-party library without modifying its core files. By using hooks, you can execute custom code at specific points in the CodeIgniter execution process, seamlessly integrating additional functionality without directly altering the library's code. This approach ensures maintainability and facilitates updates to the library without losing custom modifications.
In high-risk transactions, payment gateways might implement ________ as an additional verification step.
- Biometric Verification
- Risk Scoring
- Secure Socket Layer (SSL)
- Two-Factor Authentication
In high-risk transactions, payment gateways often implement risk scoring as an additional verification step. Risk scoring involves assessing various parameters such as transaction history, user behavior, and geolocation to determine the likelihood of a transaction being fraudulent. This adds an extra layer of security in sensitive transactions.
Describe how CodeIgniter handles data sanitization when passing data to views.
- CodeIgniter automatically applies HTML escaping to all data passed to views.
- CodeIgniter relies on the browser to sanitize data for views.
- CodeIgniter uses JavaScript to sanitize data before rendering it in views.
- Data sanitization is not handled by CodeIgniter; developers must manually sanitize data.
CodeIgniter automatically applies HTML escaping to all data passed to views, preventing cross-site scripting (XSS) attacks by default. This ensures that user input is safely rendered in the views without introducing security vulnerabilities.
In a scenario where a user's access token is compromised, the OAuth implementation should allow ________ to mitigate the risk.
- Token Refresh
- Password Change
- Two-Factor Authentication
- Token Revocation
The correct option is "Token Revocation." If a user's access token is compromised, the OAuth implementation should support revoking or invalidating the token to prevent unauthorized access. This is a crucial security measure to mitigate the risk of unauthorized access.
To retrieve a specific session value in CodeIgniter, the syntax used is $this->session->userdata('______').
- attribute
- item
- key
- value
The correct syntax is $this->session->userdata('item'), where 'item' is the key or name of the session value you want to retrieve.
In MVC, the ________ pattern is often used to automatically reflect changes in the Model to the View.
- Adapter
- Decorator
- Observer
- Singleton
In the MVC (Model-View-Controller) pattern, the Observer pattern is commonly employed to automatically update the View when changes occur in the Model. The Observer pattern establishes a one-to-many dependency between objects, ensuring that when one object changes state, all its dependents are notified and updated. This is crucial in maintaining synchronization between the Model and View in MVC.
In profiling a CodeIgniter application, the section that shows the time taken by each controller and its methods is labeled as ________.
- Benchmark Section
- Execution Time Section
- Profiling Section
- Timing Section
The Profiling Section in CodeIgniter displays detailed information about the time taken by each controller and its methods during the execution of the application. This is valuable for identifying performance bottlenecks and optimizing code.
The process of verifying the identity of a user before granting access is known as ________.
- Access Control
- Authentication
- Authorization
- Tokenization
The process of verifying the identity of a user before granting access is known as Authentication. It ensures that the user is who they claim to be before allowing them access to resources.
In CodeIgniter, how is the maximum file size for uploads defined?
- By setting the 'upload_max_size' configuration option in the config file.
- By adjusting the 'post_max_size' configuration in PHP settings.
- By using the 'set_max_size()' method in the file upload library.
- By modifying the 'max_file_size' parameter in the form tag.
In CodeIgniter, the maximum file size for uploads is defined by setting the 'upload_max_size' configuration option in the config file. This configuration ensures that files exceeding the specified size are rejected during the upload process, helping manage server resources and prevent issues related to large file uploads.
Which of the following CodeIgniter features is essential for handling RESTful API requests efficiently?
- Controllers
- Libraries
- Models
- Routing
Routing is essential for handling RESTful API requests efficiently in CodeIgniter. Properly defined routes ensure that incoming requests are directed to the appropriate controllers and methods, facilitating the seamless execution of RESTful operations. Understanding and configuring routes is fundamental to building robust RESTful APIs in CodeIgniter.