What is the primary difference between session data and flashdata in CodeIgniter?
- Flashdata is only available during the next server request and is then automatically cleared.
- Flashdata is stored in cookies, while session data is not.
- Session data is only used for flash messages and not other data.
- Session data persists throughout the user's entire session.
The primary difference between session data and flashdata in CodeIgniter lies in their lifespan. Session data persists throughout the user's entire session, while flashdata is only available during the next server request and is automatically cleared afterward. Flashdata is useful for temporary messages or data that needs to be displayed once, such as flash messages, while session data is suitable for information that should persist across multiple requests during a user's session. Understanding this difference is crucial for effective use of session-related features in CodeIgniter.
When setting up a new environment for testing, the developer should configure specific settings in the ________ directory.
- application/config
- application/config/testing
- system/config
- system/environment/testing
The application/config directory is used to store configuration files for different environments. For testing configurations, developers should create a testing folder within application/config.
How does CodeIgniter's architecture facilitate the transformation of database results into XML or JSON formats?
- Active Record Pattern
- MVC Pattern
- Observer Pattern
- Singleton Pattern
CodeIgniter follows the MVC pattern, which separates the application into models, views, and controllers. This separation makes it easy to transform database results into XML or JSON formats using views.
A secure way to handle file uploads in a distributed environment is to use ________ storage.
- cloud
- database
- distributed
- local
Using cloud storage is a secure way to handle file uploads in a distributed environment. Cloud storage providers offer scalable and reliable solutions, reducing the load on your application servers.
To minimize performance overhead, CodeIgniter's logging system uses a technique called ________.
- Asynchronous Logging
- Buffered Logging
- Circular Logging
- Deferred Logging
CodeIgniter's logging system utilizes Buffered Logging to minimize performance overhead. Buffered Logging allows log messages to be accumulated and written to the log file in a batch, reducing the impact on application performance.
What is the advantage of using autoload for frequently used Helpers in CodeIgniter?
- Enhanced Code Organization
- Faster Page Loading
- Improved Security
- Reducing Code Redundancy
Autoloading Helpers in CodeIgniter offers the advantage of reducing code redundancy. By automatically loading frequently used Helpers, developers can streamline their code and make it more concise, leading to better maintainability and readability. This practice also helps in avoiding manual loading of Helpers in every controller, contributing to a more efficient development process.
The HTTP header ________ helps in specifying which domains are allowed to embed a page, thus mitigating some types of XSS attacks.
- Access-Control-Allow-Origin
- Content-Type
- Referrer-Policy
- X-Frame-Options
The 'Access-Control-Allow-Origin' header controls which domains can embed the page, reducing the risk of XSS attacks through malicious embedding.
In CodeIgniter, which security practice is recommended for handling passwords?
- Encrypting passwords with a custom algorithm
- Storing plain text passwords
- Using the MD5 hashing algorithm
- Utilizing the bcrypt hashing algorithm
CodeIgniter recommends utilizing the bcrypt hashing algorithm for password security. Bcrypt is a strong, adaptive hashing algorithm that includes a salt, making it resistant to brute-force and rainbow table attacks. Storing plain text passwords or using weak hashing algorithms is not recommended for secure password management.
When chaining methods in Active Record Class, the order of ________ and ________ methods is crucial for correct query formation.
- from, limit
- limit, order_by
- select, where
- where, order_by
The order of limit and order_by methods is crucial when chaining methods in Active Record Class. Incorrect order can lead to unexpected query results.
By default, which method is called in a CodeIgniter controller if no method is specified in the URL?
- index()
- default()
- main()
- primary()
In CodeIgniter, if no method is specified in the URL, the default method called is "index()". It serves as the default action when no specific method is requested. The other options are not the default method names.