________ ensures that migrations are applied in the correct order and keeps track of the current schema state.
- $this->db->current_schema()
- $this->db->migrate()
- $this->db->set_schema_version()
- $this->db->version()
In CodeIgniter, $this->db->current_schema() ensures that migrations are applied in the correct order and keeps track of the current schema state.
In a scenario where a CodeIgniter application is failing randomly, a unit test should focus on ________ to identify potential issues.
- CodeIgniter core files
- External APIs
- Frequently accessed database queries
- Random input data
When an application fails randomly, the unit test should focus on external APIs to identify potential issues related to data retrieval or communication problems.
To create a custom library in CodeIgniter, the class file must be placed in the ________ directory.
- application/config
- application/core
- application/helpers
- application/libraries
In CodeIgniter, custom libraries should be placed in the 'application/libraries' directory. This is the default location where CodeIgniter looks for user-created libraries. Placing it elsewhere may lead to issues in loading the library.
The process where the Model sends data to the View is known as ________.
- Data Binding
- Data Flow
- Data Rendering
- Data Transmission
The process where the Model sends data to the View is known as Data Rendering. In this step, the Model provides data to the View, and the View is responsible for presenting it to the user in a suitable manner.
For load balancing, CodeIgniter allows the specification of multiple database servers in the ________ array.
- config
- connection
- database
- server
CodeIgniter allows the specification of multiple database servers in the database array. This feature is useful for load balancing and managing multiple database connections efficiently.
In a typical payment gateway integration, which component is responsible for handling customer payment details securely?
- Application interface
- Database server
- Payment gateway API
- Web server
The payment gateway API is responsible for securely handling customer payment details. It encrypts and transmits sensitive information, such as credit card numbers, to the payment gateway for processing while ensuring data integrity and confidentiality.
How do CodeIgniter's database utilities assist in handling database versioning?
- Automatic schema detection and adjustment
- Code generation for database schema
- Enforcing foreign key constraints through the ORM
- Version control through migration files
CodeIgniter's database utilities provide version control through migration files. Migration files allow developers to modify the database schema and keep track of changes, making it easy to apply updates across different environments.
Which of the following is a common practice to prevent SQL injection?
- Disabling error reporting
- Parameterized queries
- Storing sensitive data in plain text
- Using weak passwords
A common practice to prevent SQL injection is to use parameterized queries, which ensure that user input is treated as data and not executable code. This helps to mitigate the risk of malicious SQL injection.
In CodeIgniter, what is the best practice for logging database errors?
- Display database errors on the user interface for transparency.
- Ignore database errors to avoid unnecessary log entries.
- Store error logs in a separate database table for easy retrieval and analysis.
- Write errors directly to the application logs for quick debugging.
The best practice for logging database errors in CodeIgniter is to store error logs in a separate database table. This approach allows for easy retrieval, analysis, and monitoring of database-related issues, aiding in efficient debugging and maintenance.
When retrieving the latest 10 records from a table sorted by date, the combination of Active Record Class methods to use is: ________.
- get()
- limit()
- order_by()
- select()
To retrieve records with a limit and order them, the sequence is to use select() to choose the columns, order_by() to sort by date, limit() to specify the number of records, and finally get() to execute the query.