In ASP.NET Web Forms, how are events from server controls and standard HTML controls typically handled?

Introduction / Context:
ASP NET Web Forms supports two broad categories of controls on a page: server controls and standard HTML controls. Understanding where events from these controls are handled is important for designing interactive pages and managing postbacks. This question tests whether you know that server control events are generally processed on the server, while plain HTML control events are normally handled on the client side with JavaScript unless you explicitly wire them to cause a postback.

Given Data / Assumptions:

• ASP NET server controls include elements such as Button, TextBox, and DropDownList with runat attribute set to server.
• HTML controls are basic HTML elements such as input, select, and button without server side runat settings.
• Postback means the page sends a request back to the server to run server side event handlers.
• Client side events are handled by JavaScript or similar scripts in the browser.

Concept / Approach:
Server controls in ASP NET maintain a view state and participate in the page lifecycle. When a user interacts with a server control, such as clicking a Button, it can trigger a postback that sends form data back to the server. The ASP NET runtime then calls the corresponding server side event handler in the code behind. Standard HTML controls do not automatically participate in this lifecycle. By default, their events such as onclick or onchange run client side JavaScript handlers. Developers can manually cause postbacks with HTML controls by using special scripts, but that is not the default behavior. The key idea is that server control events are server centric, while HTML control events are primarily client centric.

Step-by-Step Solution:
Step 1: Identify which control type is designed to work with the ASP NET server side event model. Step 2: Recall that server controls use runat server and can automatically trigger postbacks that call server side methods. Step 3: Remember that HTML controls are standard browser elements that use JavaScript to handle events directly in the page. Step 4: Choose the option that describes server control events as server side and HTML control events as client side by default.

Verification / Alternative check:
You can verify by considering a simple Web Forms page with an ASP NET Button control and a plain HTML button. The ASP NET Button Click event is implemented in the code behind file and runs after a postback. The HTML button, on the other hand, often has an onclick attribute that calls a JavaScript function directly in the browser. This difference illustrates the principle described in option A.

Why Other Options Are Wrong:
Option B is wrong because server controls typically do raise events on the server via postbacks. Option C is incorrect because Global ASAX is used for application level events, not for every control event. Option D is wrong since plain HTML controls can raise events in the browser. Option E is clearly incorrect because control events are not handled inside database stored procedures by default.

Common Pitfalls:
A common pitfall is to assume that all user interactions must always cause a postback, which can lead to slow pages. Another mistake is to forget that client side validation and interactivity can be handled efficiently with HTML and JavaScript without involving the server. Choosing the right mix of server controls and HTML controls based on how and where events should be processed is an important skill in Web Forms development.

Final Answer:
Server control events are processed on the web server through postbacks, while HTML control events are usually handled on the client side in the browser using JavaScript