What is the difference between an error and an exception in programming?
- Errors are compile-time issues, while exceptions are runtime issues
- Errors are handled by the programmer, while exceptions are handled by the system
- Errors are intentional, while exceptions are unintentional
- Errors are non-recoverable, while exceptions can be handled and recovered from
The key distinction between errors and exceptions lies in their recoverability. Errors are typically non-recoverable issues that result from severe problems, such as out-of-memory errors. On the other hand, exceptions are designed to be caught and handled, allowing for graceful recovery from unexpected situations during runtime.
What is the primary purpose of OAuth in web applications?
- Creating static web pages
- Defining database schemas
- Enabling secure third-party access to resources
- Storing user passwords securely
OAuth in web applications is primarily used for enabling secure third-party access to resources. It allows users to grant limited access to their resources without sharing their credentials.
In a RESTful API built with CodeIgniter, how is pagination typically implemented for resource listings?
- Embedding pagination information in the request headers.
- Including pagination details in the request body.
- Using query parameters such as "page" and "limit" in the API endpoint URL.
- Utilizing cookies to store and retrieve pagination details.
In a RESTful API built with CodeIgniter, pagination for resource listings is typically implemented by using query parameters such as "page" and "limit" in the API endpoint URL. This allows clients to request specific pages and control the number of items per page.
What is the default behavior of transactions in CodeIgniter regarding auto-commit?
- Auto-commit is disabled by default
- Auto-commit is enabled by default
- CodeIgniter does not support transactions
- Depends on the database driver
In CodeIgniter, the default behavior of transactions is that auto-commit is enabled by default. This means that each SQL statement is treated as a single transaction and is automatically committed.
How does CodeIgniter's 'Form Validation' class contribute to application security?
- Encrypts database connections
- Enhances input data integrity
- Implements secure file uploads
- Provides secure login functionality
CodeIgniter's 'Form Validation' class enhances input data integrity by validating and filtering user input, reducing the risk of security vulnerabilities such as SQL injection and XSS attacks. It ensures that only valid and expected data is processed, contributing to overall application security.
What is the impact of using the 'strict' mode in CodeIgniter transactions?
- 'Strict' mode ensures that transactions are executed only if the database engine supports transactions.
- 'Strict' mode has no impact on CodeIgniter transactions.
- 'Strict' mode prevents CodeIgniter from automatically rolling back a transaction if an error occurs during its execution.
- In 'strict' mode, CodeIgniter throws an exception if any database error occurs during a transaction.
When 'strict' mode is enabled, CodeIgniter will automatically roll back a transaction if any database error occurs during its execution. This helps maintain data integrity by preventing the application from continuing with potentially corrupt data. It ensures that transactions are handled more cautiously, and the system responds promptly to any issues that may compromise the transaction.
In a blog application, when a post is updated, the Active Record Class method sequence that is most appropriate is: ________.
- set()
- update()
- update_batch()
- where()
The correct sequence for updating a record in CodeIgniter using Active Record is set() to set the values, followed by where() to specify the condition, and then update() to perform the update. update_batch() is used for updating multiple records simultaneously.
The ________ method in CodeIgniter is used to load a library, helper, or model.
- import()
- include()
- load()
- require()
The load() method in CodeIgniter is used to load a library, helper, or model. It is a fundamental method for loading various resources into your CodeIgniter application, facilitating code organization and reuse.
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.