these 75 question from leetcode should cover all the topic that you can expect.   Array - Two Sum - https://leetcode.com/problems/two-sum/ - Best Time to Buy and Sell Stock - https://leetcode.com/problems/best-time-to-buy-and-sell-stock/ - Contains Duplicate - https://leetcode.com/problems/contains-duplicate/ - Product of Array Except Self - https://leetcode.com/problems/product-of-array-except-self/ - Maximum Subarray - https://leetcode.com/problems/maximum-subarray/ -