Please explain Q# 1, A list operation that produces one summary item result is called Group of answer choices A. Map B. Fold C. Filter D. Iterate   Q#2, What is an accumulator? Group of answer choices A. An optional argument to a helper method B. An argument to a recursive method tracks information over the course of the recursion C. None of the above D. A recursive method that returns an accumulated value

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Q: recursive method

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A: Here is the detailed explanation of the solution

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Q: write a recursive method to schedule compatible activities that result in the maximum usage of the…

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A: Actually, java is a object oriented programming language. It is a platform independent.

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A: Please refer to the following steps for the complete solution to the problem above.

Q: Complete the implementation for the recursive function repeat_digits, which takes a positive integer…

A: Code: # repeat_digits recursive function def repeat_digits(num):     # base case     if(num <…