Question d’entretien chez Microsoft

1. Warm-up Question: about preview projects. 2. Warm-up Question: difference between heap and stack. 3. Algorithm: given a unordered array, filter the elements that can make up an ascending sub-array without changing their order and the sub-array should be the longest one. 4. Code implement: delete all the blank in a string; string inverse. 5. Some questions on testing trick.