________ 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.
Which CodeIgniter configuration option determines the number of items displayed per page in pagination?
- per_page
- display_items
- pagination_limit
- items_per_page
The correct option is per_page. This configuration option in CodeIgniter specifies the number of items to be displayed per page in pagination. It is used to control the pagination behavior and limit the number of records shown on each page.
The principle of ________ in exception handling recommends catching exceptions as close as possible to where they occur.
- Contiguity
- Immediacy
- Locality
- Proximity
The principle of locality in exception handling recommends catching exceptions as close as possible to where they occur. This practice enhances code readability and simplifies debugging.
To optimize a CodeIgniter application's performance, a developer focuses on the sections with the longest execution time in the ________ report.
- Benchmark
- Error Handling
- Profiler
- Routing
The Benchmark report in CodeIgniter highlights the execution time of different sections, allowing developers to identify and optimize areas with the longest execution time, ultimately improving the overall performance of the application.
________ exceptions are used to handle errors that are recoverable during runtime.
- Checked
- Custom
- Fatal
- Unchecked
Checked exceptions are used to handle errors that are recoverable during runtime. These exceptions must be explicitly caught or declared by the method.
During a security audit, it's discovered that large file uploads are causing server crashes. This issue relates to ________.
- Cross-Site Scripting (XSS)
- Denial of Service (DoS) Attacks
- Resource Limitations
- SQL Injection
Server crashes due to large file uploads typically point to resource limitations such as exceeding upload size limits. Managing server resources is crucial to prevent performance issues and potential crashes.
In a CodeIgniter project, a custom encryption library is introduced. To ensure seamless integration, the developer must consider ________.
- Adding the library to the autoload.php file
- Configuring encryption settings in config.php
- Placing the library in the models directory
- Replacing the built-in encryption library
To ensure seamless integration of a custom encryption library, developers should configure encryption settings in the config.php file. This allows for centralized management of encryption parameters and ensures that the custom library functions correctly within the CodeIgniter project.
When implementing a financial transaction feature, the developer uses ________ in CodeIgniter to ensure atomicity and consistency of the database.
- Database Migrations
- Database Transactions
- Input Class
- Security Class
Database Transactions in CodeIgniter are crucial for ensuring the atomicity and consistency of the database, especially in scenarios like financial transactions. By wrapping the related database operations within a transaction, the developer ensures that either all changes are committed or none, preventing data inconsistencies in case of errors or failures.
An application developer implements a new input validation library to secure against SQL injection. The effectiveness of this library is best tested by _________.
- Attempting SQL injection attacks
- Conducting code reviews
- Performing penetration testing
- Running security scans
The effectiveness of the input validation library is best tested by attempting SQL injection attacks. This involves trying various injection techniques to ensure that the implemented input validation successfully blocks unauthorized SQL code injections, enhancing the application's security.
Choosing between 'Active Record' and standard SQL in CodeIgniter impacts performance by:
- Active Record is always faster than standard SQL
- Active Record is suitable only for simple queries
- Active Record tends to be slower for complex queries
- Standard SQL is more flexible and performs better
Choosing between 'Active Record' and standard SQL in CodeIgniter impacts performance by: Standard SQL is more flexible and generally performs better for complex queries. While Active Record is convenient for simple queries, it may introduce additional overhead for more intricate database operations. Developers need to consider the nature of the queries and the performance requirements when making this choice.
In an audit, a security expert discovers that a web application is vulnerable to CSRF. The most likely missing security measure is ________.
- Anti-CSRF Tokens
- HTTPS Encryption
- Input Validation
- Session Tokens
Cross-Site Request Forgery (CSRF) is an attack where an attacker tricks the victim's browser into performing an undesired action. To prevent CSRF, web applications commonly use anti-CSRF tokens that are unique per user session. This helps ensure that the request originates from the legitimate user.
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.