AI memory refers to the ability of artificial intelligence systems to store and recall information from past interactions. ChatGPT uses short-term & long-term memory to provide personalized responses, enhancing user experience & efficiency.

React's Fiber Tree revolutionizes UI performance by breaking down rendering into smaller tasks, prioritizing high-priority updates & handling complex UIs efficiently.

Angular Signals revolutionize reactive programming with fine-grained reactivity, improved performance & declarative style, empowering devs to build responsive, efficient & scalable apps.

Feature scaling should be done after splitting dataset into training & test sets to prevent data leakage & ensure accurate model evaluation. Split first, then scale using techniques like Min-Max Scaling or Standardization (Z-score Normalization).