Question: In the context of dynamic programming, what is memoization?

Options:

1. A method to optimize space complexity
2. A technique to store results of expensive function calls
3. A way to reduce time complexity
4. A strategy for greedy algorithms

Correct Answer: A technique to store results of expensive function calls

Solution:

Memoization is a technique used in dynamic programming to store the results of expensive function calls and reuse them when the same inputs occur again, thus optimizing the computation.