I know these terms are used in context of performance achievement/optimization.
Recently have been working on that, and have tried searching; but didn't get any example, which clearly elaborate/describe these concepts with the realization of these problems/concepts in real world development scenarios.
Can somebody please thoroughly explain these terms, example scenarios, and where these concepts and terms are likely used.
Thanks.
"Boilerplate" has nothing to do with performance: it just means standard code that is required to define an application or work with some framework. It's code that is likely to be identical in every application.
A "hot spot", on the other hand, means a part of the code that is executed many times and therefore its performance matters a lot to the overall application performance. Usually a hot spot is identified by actual profiling: it's not a hot spot if it's executed many times but is so trivial that its impact on performance is minimal.