High seveority low priority: Not showing any error if a text
filed gets integer value instead of getting a character value.
High Priority low sevority: Product will crash if we click
any button or a link.

Nithya, I am sorry to say this, your answer is not 
correct.  Please find the examples as follows.

High severity low priority: While clicking some links or 
push button actions showing “The page can not be displayed” 
error, which link or function required in the next build or 
future proposed build.  

High Priority low severity: 1) The newly developed 
application showing the previous version number in the home 
page or other pages.  (While updating, developers mainly 
concentrate on functionality updates, usually they failed 
to update the version numbers)
2) Misspelled product name in the application.

High severity High priority:  1) While we do some action 
the application closes abnormally or the web page closes 
abnormally.
2) While we do some actions the application affect 
downstream or upstream applications or any databases it 
will come under this category.

It's absolutely correct.. I got the very good and real 
example. thanks for you