Which function in CodeIgniter starts a database transaction?
- $this->db->begin_transaction();
- $this->db->initiate_transaction();
- $this->db->start_transaction();
- $this->db->trans_start();
In CodeIgniter, the trans_start() function is used to initiate a database transaction. This function marks the starting point of the transaction, and any subsequent database operations will be treated as part of the transaction until it is explicitly committed or rolled back. The trans_start() function is commonly used at the beginning of a series of database operations that should be treated atomically, ensuring that they are either all successfully completed or none of them are applied.
Which of the following files is crucial for configuring CodeIgniter's URL routing?
- config.php
- index.php
- routes.config
- routes.php
The routes.php file is crucial for configuring CodeIgniter's URL routing. It is located in the config directory and allows you to define custom URL routes, specify controllers and methods, and set default routes. This file plays a key role in defining how URLs are mapped to controllers and methods in a CodeIgniter application.
To enhance user experience, ________ validation is performed as the user fills out the form fields.
- Backend
- Client-side
- Frontend
- Server-side
Client-side validation is performed in the user's browser, providing instant feedback without the need for a round trip to the server.
The configuration for error logging level is set in the ______ file.
- config.php
- database.php
- error.php
- log.php
In CodeIgniter, the configuration for error logging level is set in the log.php configuration file. You can define the error logging threshold in this file to control which types of errors should be logged, helping you manage the log information based on your application needs.
For complex query handling in a RESTful API with CodeIgniter, the ________ pattern is often utilized.
- Adapter
- Observer
- Repository
- Singleton
In CodeIgniter, the Repository pattern is commonly used for handling complex queries in a RESTful API. This pattern helps in separating the logic that retrieves the data from the underlying storage, providing a clean and organized way to manage queries.
The assertion method used to check if a function returns a boolean true is called ________.
- assert_bool
- assert_boolean
- assert_true
- assert_truthy
In CodeIgniter, the assertTrue method in PHPUnit is used to assert that a certain expression evaluates to true. This is commonly used to verify that a function returns a boolean true value.
Advanced XSS protections often involve the use of ________, which restricts scripts based on their source and inline script execution.
- Content Security Policy (CSP)
- Cross-Origin Resource Sharing (CORS)
- Cross-Site Request Forgery (CSRF)
- Cross-Site Scripting (XSS)
Content Security Policy (CSP) is a security standard that helps prevent XSS by defining trusted sources for content. This restricts scripts based on their source and inline script execution.
In a scenario where a CodeIgniter application needs to switch databases based on user roles, the database switching is typically done in the ________.
- Controller
- Database Configuration
- Model
- View
In CodeIgniter, database switching based on user roles is typically done in the Database Configuration file. This file allows you to set different database connections and switch between them based on your application's requirements.
Describe the process of using breakpoints in CodeIgniter for debugging complex issues.
- Adding break() function in code
- Breakpoints are not supported in CodeIgniter
- Configuring breakpoints in config.php
- Setting breakpoints in the IDE
Breakpoints in CodeIgniter are set within the IDE, allowing developers to pause execution at specific lines. This powerful debugging technique helps examine variable values, trace program flow, and identify and resolve complex issues efficiently.
To reduce the server response time in a CodeIgniter application, one effective strategy is to optimize ________.
- CSS Styling
- Database Queries
- Front-end Templates
- JavaScript Functions
Optimizing database queries is crucial for reducing server response time. By analyzing and optimizing SQL queries, developers can minimize database load, resulting in faster response times for CodeIgniter applications.