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      Question

      Backtracking is an algorithmic technique often used for

      problems that involve:
      A Finding the shortest path in a graph. Correct Answer Incorrect Answer
      B Optimizing a single objective function with local choices. Correct Answer Incorrect Answer
      C Exploring all possible solutions to a problem by systematically trying and undoing choices. Correct Answer Incorrect Answer
      D Sorting elements in linear time. Correct Answer Incorrect Answer
      E Merging sorted subarrays. Correct Answer Incorrect Answer

      Solution

      Backtracking is a general algorithmic technique for solving problems that incrementally build candidates to the solutions, and "backtrack" (abandon a candidate) as soon as it determines that the candidate cannot possibly be completed to a valid solution. It's essentially a systematic way to explore a search space.

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