Q8) webshphere - Root causes for HTTP 404 errors:

Based on symptoms that customers report, we can usually narrow the problem down to one of two types:
1) Page cannot be displayed or JSP/JSF error
2) WebGroup/virtual host not defined

STEP 1. Page cannot be displayed or JSP/JSF error
When we have a “Page cannot be displayed” error and the resource is a JSP page, JSF page, or servlet, or the browser is displaying a JSP error, initiate the following actions:
a. Verify that the Web server plug-in is working correctly
b. Verify that the URL that is causing the error is specified correctly
c. Verify that the Web server is responding
d. Verify that the application is running
If in case Step 1 provided hasn’t solve the problem then check the Step 2

STEP 2: WebGroup/virtual host not defined
For a “WebGroup/virtual host not defined” error, take the following actions:
a. Verify that the virtual host configuration is correct
b. Verify that the URL causing the error is specified correctly
c. Verify that the application is running