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.
A CodeIgniter application experiences slow load times during peak hours. The first step in optimizing should be to analyze ________.
- Database Queries
- Front-end Code
- Network Latency
- Server Logs
In optimizing a CodeIgniter application, analyzing server logs is crucial. This helps identify performance bottlenecks, errors, and areas for improvement. By understanding server behavior during peak hours, developers can pinpoint issues affecting load times.
For complex schema changes, ________ should be used to avoid data loss during migrations.
- $this->db->modify()
- $this->db->protect()
- $this->db->update()
- Database Seeder
In CodeIgniter, $this->db->protect() should be used for complex schema changes to avoid data loss during migrations by wrapping column and table names with backticks.
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.
What advanced technique is used in the Email Class for email encryption?
- AES Encryption
- MD5 Hashing
- RSA Encryption
- SSL Encryption
The Email Class in CodeIgniter utilizes SSL Encryption for securing email communication. SSL (Secure Sockets Layer) is a cryptographic protocol that provides a secure channel for data transmission. In the context of email, it ensures that the email content is encrypted during transmission, enhancing the security of sensitive information.