CodeIgniter Interview Questions: The Ultimate Guide for 2023 - IQCode

Introduction to CodeIgniter Framework

CodeIgniter is a powerful and open-source PHP framework based on the Model-View-Controller (MVC) architecture. It provides a set of libraries for various tasks such as database connection, session management, email sending, file uploading, etc. CodeIgniter simplifies PHP code development and allows developers to create fully interactive and dynamic websites in a shorter time. The latest version of CodeIgniter is CodeIgniter 4 v4.1.3, released on June 6, 2021.

Features of CodeIgniter Framework

CodeIgniter framework has the following features:

* Small footprint: CodeIgniter framework source code is less than 2MB in size, making it easy to learn and deploy. * Loosely Coupled: The built-in features of CodeIgniter work independently, making it easy to upgrade and maintain. * MVC Architecture: CodeIgniter framework follows a clear MVC architecture, separating data, business logic, and presentation. * Blazing Fast: CodeIgniter loads very fast and takes less than 50ms on average. * Excellent Documentation: CodeIgniter has well-maintained documentation with tutorials, books, and forums to address common issues. * Extensible: CodeIgniter includes several libraries and helpers, making it easy for developers to create their own libraries, packages, and REST APIs. * Application-specific built-in components: CodeIgniter has built-in components for email, session management, and database management. * Short Learning Curve: CodeIgniter is easy to learn and master for developers who know PHP.

The Scope of CodeIgniter Framework

CodeIgniter Framework is an ideal solution designed for developers who want to build fully functional web applications faster. CodeIgniter provides a set of libraries that enable users to develop projects quickly and efficiently by reducing the need to write code from scratch. It facilitates access to application modules and external information resources in an Object-Oriented Programming (OOP) manner. The model classes provide functions that help to insert, update, and retrieve information from databases.

CodeIgniter Interview Questions for Freshers

1. What is CodeIgniter?

What are Hooks in CodeIgniter?

In CodeIgniter, Hooks are points in the application where you can modify the flow of the framework without making any changes in the core files. Hooks provide a way to change the behavior of the application without modifying the core source code. It allows you to execute a script with specific functionality at certain events during the application execution process. Hooks can be used to log errors, authenticate users, compress output, and more. The Hooks are defined in the config file located in the application/config/ folder.

Understanding CodeIgniter Inhibitors

In CodeIgniter, an inhibitor refers to a mechanism that is used to restrict the access to a certain resource or feature. It is a security mechanism that is implemented to prevent unauthorized access, thus ensuring the safety and security of the system.

An example of an inhibitor in CodeIgniter is the "CSRF" (Cross-Site Request Forgery) inhibitor, which is used to prevent unauthorized access to sensitive data by ensuring that all requests made to the server are legitimate.

The CSFR inhibitor generates a random value that is added to each form submission. The server then checks to make sure that this value is present and correct before processing the request. If the value is not present or incorrect, the request is rejected, and the user is notified.

Inhibitors in CodeIgniter are essential components that help to prevent security breaches that may lead to data loss, corruption or unauthorized access. As such, it is important to understand and implement them properly in your CodeIgniter application for maximum security and protection.

Checking the Version of CodeIgniter

To check the version of CodeIgniter you are using, follow these steps:

  1. Open the CodeIgniter project in your desired code editor.
  2. Go to the root folder of the project.
  3. Locate the "system" folder and open it.
  4. Search for the "core" folder and open it.
  5. Open the "Controller.php" file present in the "core" folder with a text editor.
  6. Find the "CI_VERSION" constant in this file. The value assigned to this constant is the version of CodeIgniter you are using.

Alternatively, you can also find the version of CodeIgniter being used in the default welcome message that appears when you run your CodeIgniter project. The version information is displayed at the bottom of the page.

//Code to get CodeIgniter version
echo "CodeIgniter Version: " . CI_VERSION;

Using this code, you can get the CodeIgniter version programatically within your application.

Understanding the Difference between Helper and Library in CodeIgniter

In CodeIgniter, helpers and libraries are two types of resources that can be included in a project to facilitate development. While they both serve a similar purpose, there are some notable differences between them.

A helper is a simple set of functions that are grouped together in a single file. These functions can be used throughout a project for tasks such as form validation or URL manipulation. Helpers are loaded on an as-needed basis and don't require instantiation.

On the other hand, a library is a collection of classes that can contain multiple methods, properties, and other resources. Unlike helpers, libraries require instantiation before use. They can be used to perform more complex tasks such as working with databases or handling file uploads.

In general, helpers are simpler and provide basic functionality, while libraries are more complex and provide more robust features. However, both helpers and libraries are valuable resources that can greatly enhance the development of CodeIgniter projects.

Routing in CodeIgniter

Routing in CodeIgniter is the process of directing incoming URLs to their respective controllers and methods. It allows you to define custom URLs and modify the default URL structure of CodeIgniter while maintaining SEO friendly URLs. By default, CodeIgniter uses the "segment-based" approach to routing, where each segment in a URL represents a controller and corresponding method. However, you can also create routes for custom URLs that map to specific controllers and methods. This provides greater flexibility in designing the URL structure of your application.

Drivers in CodeIgniter

In CodeIgniter, drivers are a way to modularize and organize similar functionalities of a library. They are a set of classes that can be used interchangeably with one another to provide unique functionality. Drivers allow the core functionality of a library to remain the same while providing a way to extend and override specific methods and properties. This architecture allows developers to create custom drivers that can be easily integrated into an application.

How to Link Images from a View in CodeIgniter

To link images from a view in CodeIgniter, you need to follow these steps:

  1. First, make sure the image is saved in the correct directory in the CodeIgniter project. You can save images in the "assets" folder of your project.
  2. Next, use the `base_url()` function to create a link to the image in your view. The `base_url()` function should include the path to the "assets" folder.
  3. Then, add an `img` tag to your view, and set the `src` attribute to the link created by `base_url()`.

Here's an example code snippet:

  <img src="<?= base_url('assets/images/example.jpg') ?>" alt="Example Image">

This code will display an image called "example.jpg" that is saved in the "assets/images" folder of your CodeIgniter project.

Remember to include the `url` helper in your controller, so that the `base_url()` function can be used in your view.

Why CodeIgniter is called a loosely based MVC framework?

CodeIgniter is referred to as a loosely based MVC framework because it does not strictly enforce the separation of concerns that comes with a traditional MVC architecture. While CodeIgniter does have a structure similar to the MVC pattern, it allows more freedom and flexibility for developers to implement their own style of coding. For example, in CodeIgniter, views can contain logic and controllers can directly access the database. This flexibility allows for faster development, but it also requires more discipline on the part of the developer to maintain good coding practices and avoid confusion.

Understanding Helpers in CodeIgniter

In CodeIgniter, a helper is a PHP file that contains functions that can be used throughout the application. These functions can perform common tasks, such as formatting text, manipulating arrays, sending email, and more. Helpers are essentially a collection of utility functions that simplify development.

To use a helper in CodeIgniter, you need to load it using the load-helper function. For example, to load the URL helper, you would write:


Once the helper is loaded, its functions can be called anywhere in the application. For example, you could use the anchor function provided by the URL helper to generate a link:

echo anchor('', 'Click Here');

Helpers are a convenient way to organize common functionality in your application and avoid duplicating code. They are also useful for sharing utility functions across multiple controllers or views, making your code more modular and easier to maintain.

CodeIgniter Architecture Explained for Experienced Developers

CodeIgniter follows the Model-View-Controller (MVC) architectural pattern. The architecture consists of three main components:

1. Model: It represents the application data and provides data manipulation methods. The Model interacts with the database to retrieve and store data.

2. View: It is responsible for presenting data to the user interface. The View receives data from the Controller and displays it.

3. Controller: It serves as an intermediary between the Model and the View. The Controller handles the user's request, processes the data from the Model, and sends it to the View for display.

In CodeIgniter, the core files are located in the system folder, which includes libraries, helpers, drivers, and plugins. The application folder contains the user's code, such as Controllers, Models, and Views.

CodeIgniter architecture is lightweight, dynamic, and easy to learn. It provides flexibility, modular code, and easy customization.

How to Load a Helper in CodeIgniter?

In CodeIgniter, helpers are used to store reusable code that can be called throughout your application. Here's how you can load a helper in CodeIgniter:

// Load the helper in your controller

// Call the helper function in your controller

Make sure that the helper file is located in the "helpers" directory within your application's "application" folder. The file name should be "helper_name_helper.php", where "helper_name" is the name of your helper.

You can also autoload a helper by adding it to the "autoload.php" file located in the "config" directory of your application. Simply add the name of the helper to the "autoload['helper']" array.

$autoload['helper'] = array('helper_name');

Advantages of CodeIgniter

CodeIgniter is a powerful and lightweight PHP framework that provides numerous benefits to developers. Some of its advantaged include:

  1. Easy to learn and use, even for beginners
  2. Minimal coding requirements, increasing overall productivity
  3. Excellent documentation and community support
  4. Highly customizable and flexible, allowing for easy integration with third-party libraries and plugins
  5. Enhanced security features, including XSS filtering and CSRF protection
  6. Quick development time due to the availability of pre-built modules and libraries
  7. Scalability for both small and large applications

Overall, CodeIgniter is an excellent choice for any developer looking to create web applications efficiently and securely.

List of Hooks Available in CodeIgniter

The following are the available hooks in CodeIgniter:

- pre_system - pre_controller - post_controller_constructor - post_controller - display_override - cache_override - post_system

What is Command-Line Interface (CLI) and Why is it Used in CodeIgniter?

In simple terms, Command-Line Interface (CLI) is a way of interacting with a computer program through text-based commands. In CodeIgniter, we use the CLI to perform various tasks such as generating code skeletons, running database migrations and executing scheduled tasks.

The CLI provides a faster way to execute these tasks as compared to using a graphical interface. Additionally, it allows for automation and scripting of tasks, making repetitive tasks more efficient.

Overall, the CLI is an essential tool for CodeIgniter developers as it enables them to perform various tasks quickly and efficiently.

Understanding Libraries in CodeIgniter and How to Load Them

In CodeIgniter, a library is a collection of PHP classes that provide reusable and specific functionality. It is a core feature of the framework that enables you to write clean and modular code.

To load a library in CodeIgniter, you need to use the 'load' method of the 'load' object. First, you need to specify the name of the library you want to load, then call the method you want to use. Here's an example:

$this->email->from('[email protected]', 'Your Name');
$this->email->to('[email protected]');
$this->email->subject('Email Test');
$this->email->message('Testing the email class.');

In this example, we are loading the 'email' library and using its method to send an email.

You can also load your own custom library in CodeIgniter by saving the PHP class file in the 'application/libraries' directory. Then, you can load the library using the same method as above.

Keep in mind that loading a library will only make it available for use within the controller or model where it was loaded. If you want to use a library across the entire application, you can load it in the constructor of the 'MY_Controller' class.

Understanding CSRF Token in CodeIgniter and How to Set it?

CSRF stands for Cross-Site Request Forgery, which is a type of attack that targets user data by tricking them into performing unintended actions on a website. To prevent this type of attack, CodeIgniter provides a built-in CSRF protection mechanism.

A CSRF token is a unique identifier that is generated by the CodeIgniter framework and added to every form and AJAX request made on the website. Whenever a user submits a form or makes an AJAX request, the CSRF token is validated by the server to confirm that the request is coming from a legitimate source.

To set a CSRF token in CodeIgniter, you need to enable the CSRF protection feature in the config.php file. The following steps will guide you through the process:

1. Open the config.php file located in the application/config folder 2. Find the $config['csrf_protection'] variable and set it to TRUE 3. Find the $config['csrf_token_name'] variable and change the default name 'csrf_test_name' to a custom name of your choice 4. Find the $config['csrf_cookie_name'] variable and change the default name 'csrf_cookie_name' to a custom name of your choice 5. Save the config.php file

Once you have enabled the CSRF protection feature, the CSRF token will be automatically added to every form and AJAX request made on the website. You don't need to manually add the token to your forms or AJAX calls.

In conclusion, using CSRF protection is essential to ensure the security of user data on your website. By following the steps above, you can easily set up CSRF token in CodeIgniter and protect your website from CSRF attacks.

How to Extend a Class in CodeIgniter?

In CodeIgniter, extending a class is a common practice to add custom functionality to the existing library or controller. To extend a class, follow these steps:

Step 1: Create a new PHP file in the application/core directory with the name of your extended class.

Step 2: In the new PHP file, define your class and extend the parent class by using the following syntax:

class MyExtendedClass extends ParentClass {
   // add your custom functions and properties here

Step 3: Now you can use your extended class in your controller or anywhere in your CodeIgniter application by loading it using the following syntax:


That's it! You have successfully extended a class in CodeIgniter.

Differences between Laravel and CodeIgniter

Laravel and CodeIgniter are both PHP frameworks that allow developers to build web applications more efficiently. However, there are several key differences between them:

  • Laravel has a more modern and sleeker architecture than CodeIgniter, making it easier to use and learn for developers who are new to PHP frameworks.
  • CodeIgniter is known for its simplicity and flexibility, which makes it a good choice for smaller projects or projects that require a lower learning curve.
  • Laravel has a strong emphasis on object-oriented programming and comes with many pre-built features out of the box, such as authentication and authorization, that help developers build applications faster.
  • CodeIgniter has a smaller file size and requires less memory, which can make it a faster and more efficient option for smaller projects or projects with limited resources.
  • Laravel has a larger and more active community of developers, which means that it is more likely to be updated and improved over time.
Overall, the choice between Laravel and CodeIgniter depends on the specific needs of a project and the expertise of the developers involved.

List of Databases Supported by the CodeIgniter Framework

The CodeIgniter PHP framework supports the following databases:

- MySQL <br>
- PostgreSQL<br>
- Oracle<br>
- Microsoft SQL Server<br>
- SQLite<br>

You can easily configure and use any of these databases within your CodeIgniter application.

The Functionality of Anchor Tags in CodeIgniter

In CodeIgniter, anchor tags are used to generate URLs that point to a specific controller method or external pages. The anchor tag function in CodeIgniter is typically used to create HTML links that users can click on to navigate to a different page or view.

The basic syntax for creating an anchor tag in CodeIgniter is:

anchor('controller/method', 'link text');

Where `'controller/method'` refers to the name of the controller and method that the link should point to, and `'link text'` is the text that should be displayed for the link.

For example, if you have a controller named `Welcome` with a method named `index`, you could create a link to that method like this:

anchor('welcome/index', 'Click here to go to the welcome page');

When the user clicks on the link, CodeIgniter will automatically generate the correct URL to point to the `Welcome` controller's `index` method.

Overall, anchor tags provide a simple and effective way to create navigation links in CodeIgniter applications.

Explanation of CodeIgniter Email Library and Sending an Email through CodeIgniter

CodeIgniter Email Library is a built-in feature that simplifies the process of sending emails through CodeIgniter. It provides multiple options to customize different email parameters such as subject, sender's email address, recipient's email address, message body, attachments, etc.

To send an email through CodeIgniter, you first need to load the email library by calling the following code in your controller function:


After loading the library, you need to set the email parameters such as the sender's email address, recipient's email address, subject, and message body by calling the respective functions of the email library. Here's an example code snippet to set these parameters:

$this->email->from('[email protected]', 'Sender Name');
$this->email->to('[email protected]');
$this->email->subject('Email Subject');
$this->email->message('Email Message Body');

You can also attach files to your email by calling the following function of the email library:


Once you have set all the required email parameters, you can send the email by calling the following function:


This will send the email to the recipient's email address. Additionally, you can also set different email configurations such as email protocol, SMTP host, SMTP port, SMTP user, SMTP password, etc., by calling the respective functions of the email library.

Overall, the CodeIgniter Email Library provides a convenient way to send emails through CodeIgniter with various customizable options to make the emails more effective and professional.

Dealing with Error Handling in CodeIgniter

In CodeIgniter, error handling is done using the built-in Exception class.

To handle errors, you will need to create a custom exception handler class that extends the Exception class. This class will allow you to catch exceptions thrown in your application and display custom error messages.

Here's an example of how to create a custom exception handler class in CodeIgniter:

class CustomException extends Exception {

  public function errorMessage() {
    // error message
    $errorMsg = 'An error occurred on line '.$this->getLine().' in '.$this->getFile()
    .': <b>'.$this->getMessage().'</b> is not a valid parameter.';
    return $errorMsg;

// throw exception
throw new CustomException($param);

In this example, the CustomException class extends the Exception class and includes a custom errorMessage() method that will be called whenever an exception is thrown. The getMessage() method retrieves the error message, getLine() retrieves the line number, and getFile() retrieves the file where the error occurred.

To handle errors in your application, you can use the try-catch block and call your custom exception handler class. For example:

try {
  // code that may throw an exception
} catch (CustomException $e) {
  echo $e->errorMessage();

By using a custom exception handler class, you can easily manage errors in your CodeIgniter application and provide more informative error messages to users.

Explanation of default URL pattern used in CodeIgniter

In CodeIgniter, the default URL pattern used is based on the "segment" approach. This means that the URL is divided into different segments, each of which represents a specific part of the URL.

The default URL pattern in CodeIgniter follows the format of:



represents the name of the controller handling the request,


represents the name of the function being called within the controller, and


represents any specific ID related to the operation being performed.

For example, if we had a controller named "users" and a function within that controller named "view", the URL for accessing that function would be:

If we wanted to pass an ID to the function, such as the user ID of the user being viewed, we would include it as the third segment of the URL:

Overall, the segment-based URL structure in CodeIgniter allows for clear and organized URLs that are easy to understand and use.

Adding or Loading a Model in CodeIgniter

In CodeIgniter, you can add or load a model by following these steps:

1. Create a model file in your application's "models" directory (e.g. "My_model.php"). 2. Define the model class in the file using the following naming convention:

class My_model extends CI_Model {

3. Add any necessary functions to the model class. 4. Load the model in your controller by using the following code:


5. Use the model in your controller by calling its functions like this:


Note: Make sure that the file name and class name are the same and that the file is saved with the ".php" extension. Also, remember to load the model before using it in your controller.

Explanation of the Codeigniter Framework

CodeIgniter is an open-source PHP web application framework that follows the Model-View-Controller (MVC) architectural pattern.

It includes a set of libraries and helpers, which facilitate faster and easier development of web applications. The framework has a small footprint and requires minimal configuration, making it easy to understand and use.

CodeIgniter also has excellent documentation, a vibrant community, and a rich set of built-in features, including form validation, security, database abstraction, and more.

Overall, it is a great choice for developers looking to build robust and maintainable web applications quickly and efficiently.

Passing an Array from Controller to View in CodeIgniter

In CodeIgniter, passing an array from the controller to the view is a simple process. You can pass an array using the `$data` variable, which is a commonly used name for the array that is passed to the view.

Here is an example:

// In the controller
$data = array(
   'name' => 'John Doe',
   'email' => '[email protected]'

// Passing $data array to view
$this->load->view('my_view', $data);

In the above example, an array named `$data` is created with two key-value pairs. The `$data` array is then passed to the view using the `$this->load->view()` function. The first parameter of the function is the name of the view file, and the second parameter is the array to be passed to the view.

To retrieve the values from the array in the view file, use the keys to access the corresponding values. For example:

// In the view
<h1>Welcome <?php echo $name; ?></h1>
<p><?php echo $email; ?></p>

In this code, `$name` and `$email` are the keys used to access the corresponding values from the `$data` array passed from the controller.

Note that you can also pass multiple arrays to the view by adding them as additional parameters in the `$this->load->view()` function.

Preventing CSRF in CodeIgniter

To prevent Cross-Site Request Forgery (CSRF) attacks in CodeIgniter, follow the steps below:

1. Enable the CSRF protection feature in the config file located at application/config/config.php by setting the $config['csrf_protection'] variable to TRUE.

2. Load the CSRF helper in the controller where the form is located by using the below function:


3. Add the below line of code in your form to generate the CSRF token:

    <?php echo form_open('your-controller-method'); ?><br>
    <input type="hidden" name="csrf_token_name" value="<?php echo $this->security->get_csrf_hash(); ?>" /><br>
    <?php echo form_close(); ?> 

4. Verify the CSRF token in your controller’s POST request handler by using the below code snippet to check if the posted value of csrf_token_name is matched with the CSRF token value:

 if ($this->security->xss_clean($this->input->post('csrf_token_name')) !== $this->security->get_csrf_hash()) {<br>
    show_error('The form you submitted was not allowed.');<br>

Understanding and Managing Sessions in CodeIgniter

Sessions in CodeIgniter are a way of maintaining user data throughout the application. A session is a mechanism that enables a server to store data with a specific user for a specific period. The data in a session is stored on the server-side and can be accessed throughout the application.

To handle sessions in CodeIgniter, you can use the following methods:

- Starting a session: To start a session in CodeIgniter, you can use the `$this->session->start()` method. This will enable you to access the session data throughout the application.

- Adding data to a session: You can add data to a session in CodeIgniter by using the `$this->session->set_userdata()` method. This method takes an array as a parameter, and you can set multiple values at once.

- Retrieving data from a session: To retrieve data from a session, you can use the `$this->session->userdata()` method. This method takes a key as a parameter, and it will return the value associated with that key.

- Checking if a session variable exists: You can check if a session variable exists by using the `$this->session->has_userdata()` method. This method takes a key as a parameter and returns a boolean value indicating whether the key exists in the session.

- Removing data from a session: To remove data from a session, you can use the `$this->session->unset_userdata()` method. This method takes a key as a parameter, and it will remove the value associated with that key from the session.

Overall, sessions in CodeIgniter serve as an essential tool for managing user data. By learning how to properly handle sessions, you can create more secure and user-friendly web applications.

CodeIgniter Folder Structure

CodeIgniter follows a specific folder structure that helps to organize the various components of the framework. The folder structure includes:

: This folder contains all the application-specific files, including controllers, views, models, libraries, helpers, and other files.


: This folder contains the core CodeIgniter files, including system libraries, core controllers, and other system components.


: This folder contains static files such as images, stylesheets, and JavaScript files.


: This folder contains the CodeIgniter user guide documentation.


: This file is the entry point for the application and serves as the front controller for all incoming requests.


: This file is used to enable mod_rewrite on Apache servers to provide cleaner URLs for the application.

Other top-level files include license.txt, readme.rst, and composer.json.

This folder structure provides an organized and modular way to develop CodeIgniter applications and makes it easy to maintain and update them.

Security Parameter for XSS in CodeIgniter

In CodeIgniter, the security parameter for preventing XSS (Cross-Site Scripting) attacks is the "XSS Filtering" parameter. It is a security feature that automatically filters out potential malicious code from the user input data. The parameter is enabled in the "config.php" file, located in the "application/config" directory. The parameter can be set to "TRUE" or "FALSE" depending on the application's needs. It is recommended to keep this parameter enabled for better security.

Code example:

$config['global_xss_filtering'] = TRUE;

The Default Controller in CodeIgniter

In CodeIgniter, the default controller is the controller that is loaded automatically by the framework if no controller is specified in the URL. By default, the default controller is named "Welcome" and is located in the "application/controllers" directory.

To change the default controller, you can modify the "application/config/routes.php" file and set a new default controller using the following code:

$route['default_controller'] = 'new_controller';

Where "new_controller" is the name of the new default controller you want to use.

Listing Auto-loadable Resources in CodeIgniter

CodeIgniter has a feature where certain resources can be automatically loaded so they are available globally throughout the application. Here's a list of all auto-loadable resources available in CodeIgniter:


To auto-load a resource, add it to the corresponding array in the autoload.php configuration file located in the "application/config" folder.

Understanding the Controller in CodeIgniter

In CodeIgniter, the controller is a crucial component responsible for handling all the incoming requests and controlling the flow of the application. It acts as an intermediary between the model and view components, pulling data from the model and rendering it in the view. Essentially, the controller is the brain of the CodeIgniter application, determining how each request should be handled. By defining different functions within the controller, we can create different endpoints for the application, each with its own unique behavior. A well-designed controller is key to creating a robust and scalable CodeIgniter application.

Importance of Configuring URL Routes

URL routes are an essential component of web applications, and configuring them properly is necessary for several reasons:

  • Organizing the structure of a web application
  • Making URLs more readable and user-friendly
  • Enabling search engine optimization (SEO) and better search rankings
  • Enhancing the user experience and improving website navigation
  • Preventing errors and broken links caused by changes in website structure

In summary, configuring URL routes is crucial for improving website functionality, optimizing search rankings, and enhancing the user experience.

// Sample comment regarding URL routing example

Technical Interview Guides

Here are guides for technical interviews, categorized from introductory to advanced levels.

View All

Best MCQ

As part of their written examination, numerous tech companies necessitate candidates to complete multiple-choice questions (MCQs) assessing their technical aptitude.

View MCQ's
Made with love
This website uses cookies to make IQCode work for you. By using this site, you agree to our cookie policy

Welcome Back!

Sign up to unlock all of IQCode features:
  • Test your skills and track progress
  • Engage in comprehensive interactive courses
  • Commit to daily skill-enhancing challenges
  • Solve practical, real-world issues
  • Share your insights and learnings
Create an account
Sign in
Recover lost password
Or log in with

Create a Free Account

Sign up to unlock all of IQCode features:
  • Test your skills and track progress
  • Engage in comprehensive interactive courses
  • Commit to daily skill-enhancing challenges
  • Solve practical, real-world issues
  • Share your insights and learnings
Create an account
Sign up
Or sign up with
By signing up, you agree to the Terms and Conditions and Privacy Policy. You also agree to receive product-related marketing emails from IQCode, which you can unsubscribe from at any time.