Instacart Interview Questions

Showing 13 questions

Ranking

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

Question

Frequency

Difficulty

Average Waiting Time

You're given a list of customer arrival and service times. Calculate the average waiting time for all customers, assuming they are served in the order they arrive.

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

#1. Average Waiting Time

You're given a list of customer arrival and service times. Calculate the average waiting time for all customers, assuming they are served in the order they arrive.

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

Find First and Last Position of Element in Sorted Array

Given a sorted array, find the first and last position of a given target value. If the target is not found, return [-1, -1].

ArraysBinary Search

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

#2. Find First and Last Position of Element in Sorted Array

Given a sorted array, find the first and last position of a given target value. If the target is not found, return [-1, -1].

ArraysBinary Search

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

Check if Every Row and Column Contains All Numbers

Determine if every row and every column in a given square matrix contains all the numbers from 1 to n, where n is the size of the matrix. Effectively, check if it's a valid Sudoku (without subgrids).

Somewhat likely

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

#3. Check if Every Row and Column Contains All Numbers

Determine if every row and every column in a given square matrix contains all the numbers from 1 to n, where n is the size of the matrix. Effectively, check if it's a valid Sudoku (without subgrids).

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

Time Based Key-Value Store

Design a key-value store that supports storing values associated with timestamps. You should be able to retrieve the value for a given key at the latest timestamp less than or equal to a given time.

ArraysBinary Search

Somewhat likely

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

#4. Time Based Key-Value Store

Design a key-value store that supports storing values associated with timestamps. You should be able to retrieve the value for a given key at the latest timestamp less than or equal to a given time.

ArraysBinary Search

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

Squares of a Sorted Array

You're given a sorted array of integers. Return a new array containing the squares of each number, also sorted in non-decreasing order.

ArraysTwo Pointers

Somewhat likely

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

#5. Squares of a Sorted Array

You're given a sorted array of integers. Return a new array containing the squares of each number, also sorted in non-decreasing order.

ArraysTwo Pointers

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

Wildcard Matching

Determine if a string matches a pattern containing wildcard characters '?' (matches any single character) and '*' (matches any sequence of characters, including the empty sequence).

StringsDynamic ProgrammingGreedy AlgorithmsTwo Pointers

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

#6. Wildcard Matching

Determine if a string matches a pattern containing wildcard characters '?' (matches any single character) and '*' (matches any sequence of characters, including the empty sequence).

StringsDynamic ProgrammingGreedy AlgorithmsTwo Pointers

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

Word Search II

You are given a board of characters and a list of words. Find all the words from the list that can be formed by traversing adjacent cells on the board.

ArraysStringsRecursionGraphs

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

#7. Word Search II

You are given a board of characters and a list of words. Find all the words from the list that can be formed by traversing adjacent cells on the board.

ArraysStringsRecursionGraphs

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

Maximum Number of Events That Can Be Attended

You're given a list of events with start and end times. Determine the maximum number of events you can attend if you can only attend one event at a time.

ArraysGreedy Algorithms

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

#8. Maximum Number of Events That Can Be Attended

You're given a list of events with start and end times. Determine the maximum number of events you can attend if you can only attend one event at a time.

ArraysGreedy Algorithms

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

Non-overlapping Intervals

Given a collection of intervals, find the minimum number of intervals you need to remove to make the rest of the intervals non-overlapping.

ArraysGreedy Algorithms

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

#9. Non-overlapping Intervals

Given a collection of intervals, find the minimum number of intervals you need to remove to make the rest of the intervals non-overlapping.

ArraysGreedy Algorithms

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

Merge Intervals

You are given a collection of intervals. Merge all overlapping intervals into a single interval and return the result.

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

#10. Merge Intervals

You are given a collection of intervals. Merge all overlapping intervals into a single interval and return the result.

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

Minimum Number of Arrows to Burst Balloons

You're given a set of balloons represented by their start and end coordinates. Determine the minimum number of arrows needed to burst all the balloons.

ArraysGreedy Algorithms

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

#11. Minimum Number of Arrows to Burst Balloons

You're given a set of balloons represented by their start and end coordinates. Determine the minimum number of arrows needed to burst all the balloons.

ArraysGreedy Algorithms

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

Valid Number

Determine if a given string represents a valid number (integer, decimal, or exponential). Consider all possible valid formats for numbers, including edge cases like signs, exponents, and decimal points.

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

#12. Valid Number

Determine if a given string represents a valid number (integer, decimal, or exponential). Consider all possible valid formats for numbers, including edge cases like signs, exponents, and decimal points.

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

Valid Sudoku

Determine if a given 9x9 Sudoku board is valid. Check if each row, column, and 3x3 subgrid contains the digits 1-9 without repetition.

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

#13. Valid Sudoku

Determine if a given 9x9 Sudoku board is valid. Check if each row, column, and 3x3 subgrid contains the digits 1-9 without repetition.

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

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