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Data Engineer Interview Questions
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Android Unlock Pattern
SQL physical and logical schema, 2 problem solving/riddle questions
Compute the median of a list. Compute it in an optimal way if I keep increasing the size of the list.
How many joins are there? Please explain each
What is a clustered/non clustered index.
sql and python
You are given an integer list coins representing coins of different denominations and an integer amount representing a total amount of money. Return the fewest number of coins that you need to make up that amount. If that amount of money cannot be made up by any combination of the coins, return {}. You may assume that you have an infinite number of each kind of coin. Example 1: Input: coins = [1, 5, 6, 9, 15], amount = 31 Output: {15:2, 1:1} Example 2: Input: coins = [1, 5, 6, 9, 15], amount = 100 Output: {15:6, 9:1, 1:1}
If you do a xor b xor a, what is the end result?
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