Instacart Coding Interview Questions (2026)
Most-reported questions and how to practice them
9 coding questions reported by candidates for Instacart, sorted by how often they were reported. Source: community-sourced LeetCode company lists.
What the Instacart question data shows
Of the 9 questions reported for Instacart, 67% are medium, 11% are hard and 22% are easy. The most reported are Check if Every Row and Column Contains All Numbers, Find First and Last Position of Element in Sorted Array, Squares of a Sorted Array, Time Based Key-Value Store, Average Waiting Time.
This list comes from community-sourced LeetCode company lists. It covers coding questions only. It does not tell us how many rounds Instacart runs, what each round covers, or what it pays, and those change by role, level and team, so we do not list them. Ask your recruiter what each round covers, and check the company's careers page.
Prepare for the rest of the loop with the coding interview patterns guide, the system design framework, and the STAR method guide. Written by Kieron.
Practice what you read with a free AI mock interview, see how the tools compare in our AI interview copilot comparison, or check Aissence pricing.
Instacart Interview Questions
9 LeetCode questions — sorted by frequency. Question frequency is community-sourced from public interview reports and may not reflect the current process; verify details with the employer.
Last reviewed: September 5, 2026 · Source: LeetCode company-wise interview questions (community reports) · Reviewed by the Aissence Editorial Team.
Check if Every Row and Column Contains All Numbers
Find First and Last Position of Element in Sorted Array
Squares of a Sorted Array
Time Based Key-Value Store
Average Waiting Time
Wildcard Matching
Find the Length of the Longest Common Prefix
Simple Bank System
Group Anagrams
Tips for Success at Instacart
Start with the 9 most reported Instacart questions, then work down the list.
Mediums are the bulk of the list (67%), so spend most of your time there.
Time yourself: 20 to 30 minutes per medium, then explain your solution out loud as if to an interviewer.
After each problem write down the pattern and the signal that revealed it. Patterns transfer to problems you have not seen.
Pair coding practice with a system design framework and prepared behavioral stories; most loops include more than coding.
How to Practice for Instacart Interviews
Practice answering out loud with an AI interviewer built from your resume and the job description, and get a score and specific fixes for each answer. We are not affiliated with Instacart, and the mock interview is general practice rather than a simulation of Instacart's own format.
- ✓ Free mock interview built from your resume and the job description
- ✓ Desktop Interview Copilot for live interviews, where the rules allow it
- ✓ Behavioral practice with feedback on structure and specifics
- ✓ System design practice with follow-up questions
Frequently Asked Questions
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