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.
To prevent SQL injection, form inputs should be ________ before being used in database queries.
- Encrypted
- Escaped
- Hashed
- Serialized
Form inputs should be properly escaped to prevent SQL injection, ensuring that user input is treated as data rather than executable code.
What is the role of SMTP settings in the configuration of the Email Class for sending emails?
- Configuring the Email Body
- Defining the Email Subject
- Setting up the Mail Server
- Specifying the Sender's Email
SMTP (Simple Mail Transfer Protocol) settings play a crucial role in the configuration of the Email Class for sending emails. They involve specifying the mail server responsible for sending the email. Configuring SMTP settings ensures that emails are routed through the designated server, enabling reliable and efficient email delivery.
In CodeIgniter, what is the primary purpose of a Helper?
- Encapsulates controller logic
- Enhances and extends the functionality of views
- Handles routing and URL manipulation
- Manages database operations
CodeIgniter Helpers are utility functions that provide common functionality, such as form handling, URL manipulation, and more, to enhance and extend the functionality of views. They are not directly involved in database operations or routing.
In CodeIgniter, which log level is recommended for a production environment?
- DEBUG
- ERROR
- INFO
- WARNING
In a production environment, it's recommended to set the log level to ERROR to focus on critical issues that need attention. Debug and info messages might reveal too much information.
The method ________ in a controller is used to load models in CodeIgniter.
- $this->load->model()
- load->model()
- load_model
- load_model()
In CodeIgniter, to load models in a controller, you use the syntax $this->load->model('ModelName'). The load is an object, and model() is a method of that object. So, the correct syntax is $this->load->model('ModelName').
After updating CodeIgniter to a new version, a previously integrated third-party payment gateway library stops functioning. The first step to troubleshoot is to check __________.
- CodeIgniter's error logs for compatibility issues
- The payment gateway provider's server status
- The server's internet connection
- The third-party library's documentation for updates
When a third-party library stops functioning after a CodeIgniter update, the first step is to consult the library's documentation for any updates or changes. This helps identify and address any compatibility issues introduced by the CodeIgniter update.
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.
What is the advantage of using method chaining in CodeIgniter's Query Builder?
- Enhances security by automatically escaping user inputs
- Facilitates the construction of complex queries with a more readable and concise syntax
- Improves performance by reducing the number of database calls
- Simplifies error handling through better exception management
Method chaining in CodeIgniter's Query Builder provides a concise and readable syntax for constructing complex queries, making code more maintainable.
When a web application receives an OAuth access token, the next step is to use it to ________.
- Access Protected Resources
- Obtain User Consent
- Refresh the Token
- Revoke Access
After obtaining an OAuth access token, the web application should use it to access protected resources on behalf of the user. This step ensures that the application can perform authorized actions on behalf of the user.
A developer is debugging a transaction issue where even after an error, the changes are not rolled back. The first component to investigate is ________ in CodeIgniter.
- Configuration Files
- Database Connection
- Query Builder Class
- Transaction Library
When debugging a transaction issue, the Transaction Library in CodeIgniter should be investigated first. The Transaction Library provides functions like trans_start and trans_complete to manage transactions. If an error occurs and the transaction is not rolled back, it's crucial to inspect how transactions are being initiated and managed in the code.
In CodeIgniter, where are database connection settings typically defined?
- In the autoload.php file
- In the database.php configuration file
- In the index.php file
- In the routes.php configuration file
In CodeIgniter, database connection settings are typically defined in the database.php configuration file. This file is located in the config directory and allows you to specify database connection details such as database type, hostname, username, password, etc. It helps centralize and manage database configuration settings.