1. Question: Define CodeIgniter framework?
CodeIgniter is based on the Model-View-Controller (MVC) development pattern. MVC is a software approach that separates application logic from presentation. In practice, it permits web pages to contain minimal scripting since the presentation is separate from the PHP scripting.

Explanation: Not available

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2. Question: Define Model, View and Controller?
Model: The Model represents data structures. Typically model classes will contain functions that help to retrieve, insert, and update information in database.

View: The View is the information that is being presented to a user. A View will normally be a web page, but in CodeIgniter, a view can also be a page fragment like a header or footer. It can also be an RSS page, or any other type of "page".

Controller: The Controller serves as an intermediary between the Model and the View, and any other resources needed to process the HTTP request and generate a web page.

Explanation: Not available

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3. Question: What are helpers in CodeIgniter?
Helper files are a collection of functions in a particular group. Helpers can be used within Models, Controller and View files.

Explanation: Not available

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4. Question: What are plug-in for in CodeIgniter?
Plug-ins work almost identically to helper. A plug-in usually provides a single function, plug-ins are intended to be created and shared by community.

Explanation: Not available

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5. Question: Differentiate between helper and plug-in?
The main difference is that a plug-in usually provides a single function, whereas a Helper is usually a collection of functions. Helpers are also considered a part of the core system; plug-ins are intended to be created and shared by our community.In loading the difference is
$this->load->plugin(plugin name);$this->load->helper (file name of the helper);
Explanation: Not available