What is the difference between checked and unchecked exceptions?
- Checked exceptions are explicitly declared in the code, and the compiler enforces their handling.
- Checked exceptions are never thrown by CodeIgniter applications.
- Unchecked exceptions are always caught at compile time.
- Unchecked exceptions are those that must be caught at runtime.
Checked exceptions in CodeIgniter are explicitly declared in the code, and the compiler mandates their handling. On the other hand, unchecked exceptions don't require explicit handling and can be caught at runtime. Understanding this distinction is essential for robust error management in CodeIgniter.
How does implementing a Content Security Policy (CSP) help in the context of file uploads?
- Enhances file compression, improves overall system performance
- Prevents cross-site scripting (XSS) attacks, restricts unauthorized file access
- Simplifies file validation, streamlines upload workflow
- Speeds up file upload process, reduces server load
Implementing a Content Security Policy (CSP) is crucial in preventing cross-site scripting (XSS) attacks and restricting unauthorized file access. It provides an additional layer of security by controlling which sources are allowed to load, mitigating the risk of malicious file uploads.
What is the significance of 'HTTP Strict Transport Security' (HSTS) in CodeIgniter?
- Enforces the use of secure connections by instructing browsers to only connect over HTTPS
- Enhances session management for improved user experience
- Facilitates client-side validation for form inputs
- Improves database performance through optimized queries
'HTTP Strict Transport Security' (HSTS) in CodeIgniter enforces the use of secure connections by instructing browsers to only connect over HTTPS. This helps prevent man-in-the-middle attacks and enhances overall application security.
In CodeIgniter, where are log files typically stored by default?
- application/logs
- storage/logs
- system/logs
- var/logs
By default, CodeIgniter stores log files in the application/logs directory. These log files contain information about errors, warnings, and other important messages generated during the execution of the application. Developers can configure logging settings in the config.php file within the application/config directory. The logging system is an essential tool for debugging and monitoring the application's behavior in different environments.
In secure form validation, ________ tokens are often used to verify the authenticity of the form submission.
- CSRF
- HMAC
- JWT
- MD5
Cross-Site Request Forgery (CSRF) tokens are used to prevent unauthorized form submissions by ensuring that the form is submitted from the legitimate source.
Which feature in CodeIgniter helps to identify the source and nature of an error?
- Error Pages
- Exception Handling
- Logging Library
- Profiler
The Logging Library in CodeIgniter helps identify the source and nature of errors by recording detailed information about events, making it easier to analyze and debug issues.
Integrating third-party libraries often requires updating the __________ file to include necessary dependencies.
- autoload.php
- config.php
- database.php
- routes.php
The autoload.php file in CodeIgniter is responsible for loading classes and dependencies. When integrating third-party libraries, you often need to update the autoload.php file to include the necessary dependencies required by the libraries.
In CodeIgniter, which method of the Query Builder is commonly used to select data from a database?
- delete()
- insert()
- select()
- update()
In CodeIgniter, the select() method of the Query Builder is commonly used to retrieve data from a database. This method is used to specify the columns that should be selected in the SQL query. It provides a flexible way to fetch data based on specific criteria.
In CodeIgniter, how can custom profiling data be added to the profiler output?
- Modify the config/profiler.php file
- Profiling data cannot be customized
- Use the add_profiler_data() method
- Use the set_custom_data() function
Custom profiling data in CodeIgniter can be added to the profiler output using the add_profiler_data() method, allowing developers to include specific information for analysis.
How does the Query Builder in CodeIgniter help in preventing SQL injection?
- It automatically escapes data used in queries
- It enforces strict input validation
- It restricts the use of certain SQL keywords
- It uses a complex encryption algorithm
The Query Builder in CodeIgniter helps prevent SQL injection by automatically escaping data used in queries. This means that user input is sanitized before being included in the SQL statement, reducing the risk of malicious SQL injection attacks. It adds a layer of security by handling the proper escaping of data, making the application more robust against common security threats.