Efficient pagination in a CodeIgniter application with AJAX involves updating the ________ without reloading the entire page.
- content_area
- entire_page
- pagination_container
- pagination_links
In AJAX-based pagination in CodeIgniter, the key is to update the pagination_container without refreshing the entire page. This enhances user experience by dynamically loading and displaying paginated data.
To delete a record, the Model method in CodeIgniter used is ________.
- delete()
- discard()
- erase()
- remove()
The correct method for deleting a record in CodeIgniter is delete(). This method is used to remove records from the database table based on specified conditions.
What is the best practice for managing layout and views in CodeIgniter for a large application?
- Place all views in the root folder for easy access.
- Use a modular structure with separate folders for controllers, models, and views.
- Use multiple controllers with duplicated views for simplicity.
- Utilize a single controller and model for all views.
The best practice for managing layout and views in a large CodeIgniter application is to adopt a modular structure, organizing controllers, models, and views in separate folders. This enhances maintainability and scalability.
What is the primary purpose of using transactions in CodeIgniter?
- Ensure data consistency
- Manage user authentication
- Prevent data corruption
- Simplify database queries
In CodeIgniter, transactions are primarily used to ensure data consistency. Transactions help in maintaining the integrity of the database by allowing a series of database operations to be treated as a single, atomic unit. This ensures that either all the operations are successfully completed, or none of them are applied, preventing partial updates and maintaining data integrity. Transactions are crucial in scenarios where multiple database operations must be executed as a single, indivisible unit.
In a reporting module, a developer needs to combine data from multiple tables with conditions. This task is most efficiently performed using ________ in CodeIgniter's Query Builder.
- combine()
- group()
- join()
- merge()
In CodeIgniter's Query Builder, the join() method is used to combine data from multiple tables with specified conditions. It allows developers to create complex queries involving multiple tables efficiently.
Which HTML5 feature provides native form validation without additional scripting?
- Cascading Style Sheets (CSS) validation
- Constraint Validation API
- Document Object Model (DOM) Validation API
- Hypertext Transfer Protocol Secure (HTTPS) validation
The Constraint Validation API in HTML5 provides native form validation without requiring additional scripting. This API allows developers to specify constraints directly in the HTML markup, and the browser takes care of validation. It includes attributes like required, pattern, and others to define rules for input fields without the need for additional scripting.
Custom libraries in CodeIgniter can be distributed via ________, enabling easier sharing and updating among developers.
- CodeIgniter Package Manager
- Composer
- Git
- Packagist
Git is a popular version control system that facilitates the distribution of custom CodeIgniter libraries. By hosting libraries on Git repositories, developers can easily share, update, and collaborate on projects, enhancing the overall development process.
How does the 'Controller' in MVC architecture communicate with the 'Model'?
- Direct function calls
- Session variables
- Through events and listeners
- Using RESTful APIs
In CodeIgniter's MVC architecture, Controllers interact with Models through events and listeners. Events triggered in the Controller are listened to by the Model, allowing communication without direct coupling.
Which directory do you typically find Helpers stored in a standard CodeIgniter project?
- /application/helpers
- /application/libraries
- /system/helpers
- /system/libraries
CodeIgniter Helpers are typically stored in the /application/helpers directory. This separation allows for easy organization and customization of helpers for specific projects. They should not be placed in the system directory, which is reserved for core framework files.
For a multi-language application, a controller in CodeIgniter switches the language based on user preference using the ________ method.
- $this->config->set_item()
- $this->lang->line()
- $this->lang->load()
- $this->language->switch()
CodeIgniter provides the $this->lang->load() method to switch the language in a multi-language application. It loads language files based on the user's language preference, enabling the application to display content in the selected language.