let me try -
What will you do if selenium is not clicking on a link?
My counter question would be - is there any error encountered?
How did you test flash based application in selenium?
There is flex-selenium
How can I test windows based calculator with selenium?
You can not
Can you test java applets with selenium?
Depends, if there are enough testing hooks in applet to be invoked directly though selenium APIs
can selenium be used to test on chrome? how?
For Selenium 2 -
http://code.google.com/p/selenium/wiki/ChromeDriverSuppose the application is not working in mozilla and is working in IE. How do you find xpaths in IE.
http://stackoverflow.com/questions/214862/equivalent-of-firebugs-copy-xpath-in-internet-explorerHow can you configure proxy settings with selenium when using IE and mozilla ?
For selenium 1 there is information on proxy setting in this chapter -
http://seleniumhq.org/docs/05_selenium_rc.html
~ seleniumtests.com