[4 marks] Describe the observer design pattern. Give an example of a situation in which it would be good to make use of thisJAVA

[4 marks] Describe the observer design pattern. Give an example of a situation in which it would be good to make use of this design pattern. [3 marks] What is a finite state machine? Describe how a finite state machine could be used in the implementation of a tokenizer that is used by a compiler. [3 marks] What is copyright? How do we protect copyright? Compare patents land trademarks



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