For advanced error handling, CodeIgniter's ________ library can be extended.
- Debug
- Error
- Exception
- Log
In CodeIgniter, the Exception library is used for advanced error handling. It allows developers to extend and customize error handling mechanisms.
What does 'MVC' stand for in web development?
- Model-View-Component
- Model-View-Configuration
- Model-View-Content
- Model-View-Controller
In web development, 'MVC' stands for Model-View-Controller. This architectural pattern separates the application into three interconnected components: the Model (data and business logic), the View (presentation and user interface), and the Controller (handles user input and manages the communication between Model and View). Understanding MVC is fundamental to CodeIgniter development.
Explain the role of 'trans_status()' function in CodeIgniter's transaction management.
- 'trans_status()' checks whether the current transaction is active or has been rolled back.
- 'trans_status()' is deprecated in the latest CodeIgniter versions.
- 'trans_status()' is used to initiate a new transaction in CodeIgniter.
- 'trans_status()' returns true if the transaction has been successfully completed and false otherwise.
'trans_status()' is a function in CodeIgniter that checks whether the current transaction is marked as successful or has been rolled back. It returns a boolean value, true if the transaction has been successfully completed, and false if it has been rolled back or if no transaction is in progress. This function is handy for checking the status of a transaction and making decisions based on whether it was successful or not.
In CodeIgniter, how can you extend the session timeout for a user?
- By adjusting the session timeout setting in the config.php file.
- By modifying the session timeout directly in the database.
- By using the session_extend method in the session library.
- CodeIgniter does not provide a way to extend session timeouts.
By adjusting the session timeout setting in the config.php file. CodeIgniter allows developers to set the session timeout in the config.php file using the sess_expiration parameter. By increasing the value of this parameter, you can extend the session timeout for a user, providing a more flexible and customizable approach to session management in your CodeIgniter applications.
In the Email Class, ________ is/are used to handle non-English characters in email content.
- Base64 Encoding
- Character Encoding
- HTML Entities
- Unicode Escaping
In the Email Class, character encoding is used to represent non-English characters in a way that can be properly transmitted and displayed. This ensures that the email content is correctly interpreted by email clients, especially when dealing with special characters or non-ASCII characters.
The CodeIgniter Model method ________ is used to update existing records in the database.
- alter()
- change()
- modify()
- update()
The correct method for updating existing records in CodeIgniter is update(). This method allows you to modify the data in the database table based on certain conditions.
In a situation where a customer's payment fails due to network issues, the payment gateway should ideally implement ________ to handle such scenarios.
- Cache Mechanism
- Exception Handling
- Retry Mechanism
- Rollback Procedure
In the case of network issues during payment, a retry mechanism is crucial for the payment gateway to reattempt the transaction, providing a better chance of success. This helps in handling transient failures effectively.
When implementing a Content Security Policy (CSP) to protect against XSS, a developer needs to ensure that ________ to avoid unintended script blockages.
- Data URIs
- External Scripts
- Inline Scripts
- Unsafe Inline
Content Security Policy (CSP) is a security standard that helps prevent XSS attacks. "Unsafe Inline" allows inline script execution, but it's important to avoid it whenever possible to enhance security.
Where should custom libraries be placed within the CodeIgniter directory structure?
- application/helpers
- application/libraries
- system/helpers
- system/libraries
Custom libraries in CodeIgniter should be placed in the application/libraries directory. This ensures that they are easily accessible and follow the CodeIgniter directory structure conventions.
To enable database caching in CodeIgniter, the $db['default']['cache_on'] setting must be set to ________.
- 0
- 1
- FALSE
- TRUE
In CodeIgniter, setting $db['default']['cache_on'] to true enables database caching, and setting it to false disables caching. This configuration helps optimize database performance by caching query results for a specified period, reducing the need to re-run queries.