In client-side validation, which language is commonly used to validate form inputs before submission?
- CSS
- JavaScript
- PHP
- Python
JavaScript is commonly used for client-side form validation. It enables validation before data submission, improving user experience by providing real-time feedback. This helps in catching errors early and reduces the load on the server for validation tasks.
How do migrations in CodeIgniter assist in maintaining consistency across different environments?
- Version Control
- Database Synchronization
- Schema Management
- Code Deployment
Migrations in CodeIgniter play a crucial role in managing database schema changes. The "Schema Management" option refers to the capability of migrations to update the database schema, ensuring consistency across various environments during application deployment.
________ is a technique in MVC that involves breaking down complex Views into smaller, reusable components.
- Abstraction
- Encapsulation
- Inheritance
- Templating
Templating is a technique in MVC (Model-View-Controller) that involves breaking down complex Views into smaller, reusable components. Templating simplifies the presentation layer by allowing the creation of modular and maintainable views. It promotes code reusability and separation of concerns within the application architecture.
Implementing ___________ as part of database access controls can reduce the impact of potential SQL injection attacks.
- Biometric Authentication
- CAPTCHA
- Role-Based Access Control
- Two-Factor Authentication
Role-Based Access Control (RBAC) is an access control method that restricts system access based on user roles. Implementing RBAC for database access helps limit the impact of SQL injection attacks by ensuring users only have the necessary permissions for their roles.
For advanced transaction handling, CodeIgniter provides the ________ feature to manage complex scenarios.
- Isolation Levels
- Nested Transactions
- Savepoints
- Transaction Guard
CodeIgniter provides the "Savepoints" feature for advanced transaction handling. Savepoints allow you to set points within a transaction to which you can later roll back if needed. This is especially useful for managing complex scenarios where certain parts of a transaction may need to be rolled back independently.
How does pagination improve the performance of a CodeIgniter application with large datasets?
- By loading all data at once
- By minimizing the use of controllers
- By reducing the number of database queries
- By using external APIs for data retrieval
Pagination in CodeIgniter improves performance by reducing the number of database queries. It fetches and displays only the required data for each page, optimizing resource usage and enhancing overall application speed.
To optimize a search feature, a CodeIgniter Model might use ________ to filter results.
- Active Record
- Controller
- Libraries
- Routing
CodeIgniter's Active Record feature allows the Model to easily filter and retrieve specific data from the database, making it a suitable choice for optimizing search features in an application.
For a project requiring a database to be populated with specific types of data for testing, the developer would use ________.
- Controller
- Database Seeder
- Model
- Query Builder
CodeIgniter provides a Database Seeder feature that allows developers to populate the database with specific data for testing purposes. This ensures a controlled environment for testing and validating various scenarios.
For advanced debugging and logging, developers can utilize the ________ directory in CodeIgniter.
- application
- config
- logs
- system
In CodeIgniter, the 'logs' directory is crucial for advanced debugging and logging. It contains log files that provide valuable information for identifying and troubleshooting issues in the application. Developers can find detailed error messages and system activity logs here.
Which directory contains the primary index.php file that serves as the entry point for a CodeIgniter application?
- application
- public
- root
- system
The primary index.php file that serves as the entry point for a CodeIgniter application is located in the 'public' directory. This file initializes the framework and routes incoming requests to the appropriate controllers. It is essential for the proper functioning of the CodeIgniter application.
In OAuth, what is the difference between an access token and a refresh token?
- A string representing the resource owner's authorization grant
- A token issued to the client to access protected resources
- A token that contains information about the user
- A token used to obtain a new access token
In OAuth, an access token is used to access a resource, while a refresh token is used to obtain a new access token when the original one expires. The refresh token provides a way to maintain access without requiring the user to re-authenticate.
How does the use of Object-Relational Mapping (ORM) frameworks contribute to SQL injection prevention?
- It abstracts database interactions
- It encrypts the database
- It uses plain SQL queries
- It validates user inputs only
Object-Relational Mapping (ORM) frameworks, such as those used in CodeIgniter, contribute to SQL injection prevention by abstracting database interactions. This means that the framework automatically handles the translation of high-level object-oriented code into the underlying SQL queries, reducing the risk of SQL injection by preventing direct user input in SQL statements.