1]High Severity And Low Priority----If  there is an 
application , if that application crashes after mulple use 
of any functionality (exa--save Button use 200 times then 
that application will crash)

Means High Severity because application chrashed but Low 
Priority because no need to debug right now you can debug 
it after some days.

2]High Priority And Low Severity---- If any Web site 
say "Yahoo" now if the logo of site "Yahoo" spell s "Yho"  -
---Than Priority is high but severity is low.

Because it effect the name of site so important to do 
quick ---Priority

but it is not going to crash because of spell chage so 
severity low.

------------------------------------------------------------
Severity 

---------------

1. Bug causes system crash or data loss.

2. Bug causes major functionality or other severe problems; 
product crashes in obscure cases.

3. Bug causes minor functionality problems, may affect "fit 
anf finish".

4. Bug contains typos, unclear wording or error messages in 
low visibility fields. 

 

Priority

---------------

1. Must fix as soon as possible.  Bug is blocking further 
progress in this area.

2. Should fix soon, before product release.

3. Fix if time; somewhat trivial. May be postponed.

Hi Sriharsha,
Although you have answered correctly, 
U have not read the question properly.
I.E Question was for High Severity,Priority Low Severity,
priority
Q.High Severity High Priority
Ans:-If there is a functionality of Calculator Pressing 2+2=7
then severity is high at the same time priority is also high.

Q.Low Severity Low Priority
Ans:-If the Font Size of the text from one page to another
page is varying slightly then we can say it as Low Severity
and Low Priority.