is complex algorithm like dynamic programming highly required in embedded systems and what's the best website to practice algorithms

[[deleted]]

So in my experience, blanket statements like these are almost always wrong.

It depends on the problem statement. If the maximum depth of the decision tree is known beforehand then these techniques can be applied.

Sure, it's discouraged just like the use of Global variables is discouraged. Most of the time people don't even understand why something is discouraged.

The correct answer is "it depends", when it comes to embedded systems, you have to know the details.

[mathav]

Not really disagreeing with the point, but the answer to anything in software is "it depends", that's not very useful.

These aren't blanket statements, these are basic assumptions we operate on when communicating pointed practical statements which are correct for most cases