@dhanya : Instead of hardcoding 80 here, it would be much better and easy to maintain the code in the future if creating a variable which is 80 itself but shows how the 80 is computed. For example:
<pre>
CGFloat offsetDescriptionLabel = 10;
CGFloat offsetIncompatibilityMsg = 20; 
..
CGFloat scrollViewHeight = yPosition + offsetDescriptionLabel + offsetIncompatibilityMsg + ...; //which equals to 80
</pre>