Salesforce.com FAQ or Interview Questions

People who are using salesforce.com or newly migrating to this platform or who are seeking a career on this platform definitely face some challenges. I am trying to consolidate a few technical questions here.
Questions

1. What is Apex
Ans: It is the in-house technology of salesforce.com which is similar to Java programming with object oriented concepts and to write our own custom logic.

2. What is an S-Control
Ans: S-Controls are the predominant salesforce.com widgets which are completely based on Javascript. These are hosted by salesforce but executed at client side. S-Controls are superseded by Visualforce now.

3. What is a Visualforce Page
Ans: As I said in the above answer, S-controls are superseded by Visulaforce, Visualforce is the new markup language from salesforce, by using which, We can render the standard styles of salesforce. We can still use HTML here in Visualforce. Each visualforce tag always begins with "apex" namespace. All the design part can be acomplished by using Visualforce Markup Language and the business logic can be written in custom controllers associated with the Page.

4. Will Visual force still supports the mege fields usage like S-control.
Ans: Yes. Just like S-Controls, Visualforce Pages support embedded merge fields, like the {!$User.FirstName} used in the example.

5. Where can I write my Visualforce code
Ans: You can write the code basically in 3 ways. One go to, setup->App Setup->Develop->Pages and create new Visulaforce page. While creating the Page, You will find a salesforce editor. You can write your Visualforce content there. Or go to Setup -> My Personal Information -> Personal Information -> Edit check the checkbox development mode. When you run the page like this, https://ap1.salesforce.com/apex/MyTestPage. you will find the Page editor at the bottom of the page. You can write you page as well as the controller class associated with it, there it self. OR Using EclipseIDE you can create the Visulaforce page and write the code.

Stay tuned.... I will be posting more questions and articles on salesforce.com technical side very soon.

More Qustions are Here. All the best for the newbies...

Thanks Srinivas,
www.trekbin.com