Robinhood Interview Questions

Showing 14 questions

Ranking

A question's ranking corresponds to how commonly it's asked by Robinhood. The higher the ranking, the more likely you'll encounter it in a Robinhood interview.

Question

Frequency

Difficulty

Top K Frequent Words

Find the k most frequently occurring words in a given list of words. Return the top k words sorted by frequency, and then alphabetically for words with the same frequency.

ArraysStringsGreedy Algorithms

If you have a Robinhood interview, it's very likely that you will get this question

#1. Top K Frequent Words

Find the k most frequently occurring words in a given list of words. Return the top k words sorted by frequency, and then alphabetically for words with the same frequency.

ArraysStringsGreedy Algorithms

This question is very likely to be asked in your Robinhood interview

Number of Orders in the Backlog

Simulate an order processing system with a backlog of buy and sell orders. Determine the total number of orders remaining in the backlog after processing them in a specific manner.

ArraysGreedy AlgorithmsHeapPriority Queue

If you have a Robinhood interview, it's very likely that you will get this question

#2. Number of Orders in the Backlog

Simulate an order processing system with a backlog of buy and sell orders. Determine the total number of orders remaining in the backlog after processing them in a specific manner.

ArraysGreedy AlgorithmsHeapPriority Queue

This question is very likely to be asked in your Robinhood interview

Restore the Array From Adjacent Pairs

You're given pairs of adjacent numbers from a hidden array. Reconstruct and return the original array using these pairs.

Somewhat likely

If you have a Robinhood interview, you might get this question

#3. Restore the Array From Adjacent Pairs

You're given pairs of adjacent numbers from a hidden array. Reconstruct and return the original array using these pairs.

This question is somewhat likely to be asked in your Robinhood interview

Count Good Meals

You're given a list of meals, each with a certain deliciousness value. Determine how many pairs of meals have a combined deliciousness that is a power of two.

ArraysTwo Pointers

Somewhat likely

If you have a Robinhood interview, you might get this question

#4. Count Good Meals

You're given a list of meals, each with a certain deliciousness value. Determine how many pairs of meals have a combined deliciousness that is a power of two.

ArraysTwo Pointers

This question is somewhat likely to be asked in your Robinhood interview

Count the Number of Consistent Strings

Determine how many strings from a given array only contain characters present in a specified allowed characters string. Count the number of such consistent strings.

Somewhat likely

If you have a Robinhood interview, you might get this question

#5. Count the Number of Consistent Strings

Determine how many strings from a given array only contain characters present in a specified allowed characters string. Count the number of such consistent strings.

This question is somewhat likely to be asked in your Robinhood interview

Brightest Position on Street

Imagine houses along a street, each with a brightness level and range of influence. Find the street position with the maximum total brightness from nearby houses.

ArraysTwo PointersSliding Windows

If you have a Robinhood interview, it's unlikely that you will get this question

#6. Brightest Position on Street

Imagine houses along a street, each with a brightness level and range of influence. Find the street position with the maximum total brightness from nearby houses.

ArraysTwo PointersSliding Windows

This question is not likely to be asked in your Robinhood interview

Check if There is a Valid Path in a Grid

Given a grid where each cell represents a street, determine if there's a valid path from the top-left to the bottom-right corner. The street directions must align for a valid path to exist.

If you have a Robinhood interview, it's unlikely that you will get this question

#7. Check if There is a Valid Path in a Grid

Given a grid where each cell represents a street, determine if there's a valid path from the top-left to the bottom-right corner. The street directions must align for a valid path to exist.

This question is not likely to be asked in your Robinhood interview

Ways to Split Array Into Three Subarrays

You're given an array of numbers. Find how many ways you can split it into three non-empty subarrays such that the sum of the first is less than or equal to the second, and the sum of the second is less than or equal to the third.

ArraysTwo PointersSliding Windows

If you have a Robinhood interview, it's unlikely that you will get this question

#8. Ways to Split Array Into Three Subarrays

You're given an array of numbers. Find how many ways you can split it into three non-empty subarrays such that the sum of the first is less than or equal to the second, and the sum of the second is less than or equal to the third.

ArraysTwo PointersSliding Windows

This question is not likely to be asked in your Robinhood interview

Top K Frequent Elements

Find the k most frequent elements in a given array of numbers. Return the top k elements based on their frequency.

If you have a Robinhood interview, it's unlikely that you will get this question

#9. Top K Frequent Elements

Find the k most frequent elements in a given array of numbers. Return the top k elements based on their frequency.

This question is not likely to be asked in your Robinhood interview

Minesweeper

Play a simplified version of Minesweeper. Given a board with mines, reveal a cell and update the board with numbers indicating adjacent mines.

ArraysRecursionGraphs

If you have a Robinhood interview, it's unlikely that you will get this question

#10. Minesweeper

Play a simplified version of Minesweeper. Given a board with mines, reveal a cell and update the board with numbers indicating adjacent mines.

ArraysRecursionGraphs

This question is not likely to be asked in your Robinhood interview

Text Justification

Given a sequence of words and a line width, format the text to fit within the specified width. You must justify the text, distributing extra spaces evenly between words.

If you have a Robinhood interview, it's unlikely that you will get this question

#11. Text Justification

Given a sequence of words and a line width, format the text to fit within the specified width. You must justify the text, distributing extra spaces evenly between words.

This question is not likely to be asked in your Robinhood interview

Best Time to Buy and Sell Stock

You're given daily stock prices. Find the maximum profit you can make by buying and selling the stock once. You must buy before you sell.

ArraysTwo PointersDynamic Programming

If you have a Robinhood interview, it's unlikely that you will get this question

#12. Best Time to Buy and Sell Stock

You're given daily stock prices. Find the maximum profit you can make by buying and selling the stock once. You must buy before you sell.

ArraysTwo PointersDynamic Programming

This question is not likely to be asked in your Robinhood interview

Defanging an IP Address

Replace the periods in a given IP address with '[.]'. This effectively "defangs" the IP address to prevent accidental clicking.

If you have a Robinhood interview, it's unlikely that you will get this question

#13. Defanging an IP Address

Replace the periods in a given IP address with '[.]'. This effectively "defangs" the IP address to prevent accidental clicking.

This question is not likely to be asked in your Robinhood interview

Employee Importance

You are given a list of employees, each with an ID, importance value, and a list of subordinates' IDs. Find the total importance value of a given employee and all their subordinates in the company hierarchy.

ArraysGraphsRecursion

If you have a Robinhood interview, it's unlikely that you will get this question

#14. Employee Importance

You are given a list of employees, each with an ID, importance value, and a list of subordinates' IDs. Find the total importance value of a given employee and all their subordinates in the company hierarchy.

ArraysGraphsRecursion

This question is not likely to be asked in your Robinhood interview

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