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What is the best data structure for maintaining urls

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Reference no: EM131361946

1. What is the best data structure for maintaining URLs that have been visited by a Web crawler? Give an algorithm to test whether a given URL has already been visited, optimizing both space and time.

2. Reverse the words in a sentence-i.e., "My name is Chris" becomes "Chris is name My." Optimize for time and space.

Reference no: EM131361946

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