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.
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 user is unable to submit a form because the email field is flagged as invalid. This is likely due to ________ validation failing.
- Back-end
- Client-side
- Front-end
- Server-side
Server-side validation ensures that data sent to the server is correct and secure. In this case, the email field's invalid flag indicates a server-side validation failure.
In CodeIgniter, what is the significance of HTTP status codes in RESTful API responses?
- They convey the success or failure of the request
- They determine the caching policy
- They indicate the type of content returned
- They provide information about the server's health
HTTP status codes in CodeIgniter's RESTful API responses convey the success or failure of the request. For example, a 200 status code indicates success, while a 404 status code indicates that the requested resource was not found. Understanding these codes is crucial for effective communication between the server and client in RESTful applications.
To add a custom string to a Query Builder statement without escaping, use the ________ method.
- add_string()
- custom_string()
- escape_string()
- set_string()
The correct method for adding a custom string to a Query Builder statement without escaping is add_string(). This method allows developers to include raw, unescaped SQL strings in their queries, providing flexibility when needed.
To secure a RESTful API in CodeIgniter against unauthorized access, focusing on ________ is critical.
- Authentication
- Caching mechanisms
- Encryption
- Load balancing
Securing a CodeIgniter RESTful API against unauthorized access primarily involves implementing robust authentication mechanisms. This ensures that only authenticated users or systems can access protected resources. Techniques such as API keys, OAuth, or token-based authentication can be employed to enhance security and prevent unauthorized access.
To prevent direct access to a controller's method in CodeIgniter, prefix the method name with ________.
- private
- public
- secret
- underscore
To prevent direct access, prefix the method name with an underscore (_). CodeIgniter considers methods with an underscore as private, making them inaccessible via a URL. This enhances security by restricting direct access to internal methods.
In CodeIgniter, which method is recommended for sending form data to a view?
- $this->form->open()
- $this->load->form()
- $this->load->form_open()
- $this->load->helper('form')
The recommended method for sending form data to a view in CodeIgniter is by loading the form helper using $this->load->helper('form'). This helper provides functions to create form elements and handle form submissions efficiently.
To simulate a database in unit tests, CodeIgniter recommends using ________.
- FakeDatabase
- MockDatabase
- SimDatabase
- TestDatabase
CodeIgniter suggests using the CIUnitTestCase class and the DBUnitTestCaseTrait trait to simulate a database in unit tests. This helps in testing database interactions without affecting the actual database.
How does the 'third_party' directory differ from the 'libraries' directory in CodeIgniter?
- It contains external libraries and packages.
- It holds third-party assets like images and styles.
- It is a reserved directory for future framework use.
- It is used for storing custom CodeIgniter libraries.
The 'third_party' directory is intended for external libraries and packages, while the 'libraries' directory is meant for custom libraries created within the application.