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    Question

    Which of the following properties must a problem exhibit

    to be solvable by a greedy algorithm?
    A Overlapping subproblems and optimal substructure. Correct Answer Incorrect Answer
    B Greedy choice property and optimal substructure. Correct Answer Incorrect Answer
    C No backtracking and exponential time complexity. Correct Answer Incorrect Answer
    D Memoization and tabulation. Correct Answer Incorrect Answer
    E Divide and conquer and recursion. Correct Answer Incorrect Answer

    Solution

    Greedy algorithms work by making locally optimal choices at each step with the hope that these choices will lead to a globally optimal solution. This requires two properties:     1.  Greedy Choice Property: A globally optimal solution can be arrived at by making a locally optimal (greedy) choice.     2.  Optimal Substructure: An optimal solution to the problem contains optimal solutions to its subproblems.

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