Instacart Interview Questions (4+ Questions)
Last Updated: June 8, 2026 • 4 Questions • Real Company Interviews
Prepare for your Instacart interview with our comprehensive collection of 4+ real interview questions and detailed answers. These questions have been curated from actual Instacart technical interviews across various roles including DevOps Engineer, Data Engineer, QA Engineer, and more.
Table of Contents
Our Instacart interview questions cover a wide range of technical topics and difficulty levels, from entry-level positions to senior roles. Each question includes detailed explanations and answers to help you understand the concepts and prepare effectively for your interview.
💡 Pro Tips for Instacart Interviews
- Practice each question and understand the underlying concepts
- Review Instacart's specific technologies and methodologies
- Prepare follow-up questions and edge cases
- Practice explaining your solutions clearly and concisely
Interview Questions & Answers
1. Cheapest Flights Within K Stops
def find_cheapest_price(n: int, flights: list[list[int]], src: int, dst: int, k: int) -> int:
prices = [float("inf")] * n
prices[src] = 0
for i in range(k + 1):
temp_prices = prices.copy()
for u, v, w in flights:
if prices[u] != float("inf") and prices[u] + w < temp_prices[v]:
temp_prices[v] = prices[u] + w
prices = temp_prices
return prices[dst] if prices[dst] != float("inf") else -1
2. Self-Join for Duplicate Email Detection
When preparing for a technical interview, you may encounter questions that test your ability to manipulate and query databases using SQL. One such common question is:
Objective
Retrieve all email addresses that appear more than once in the Customers table. The result should list each duplica...
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Detailed explanation and solution available for premium members.
3. Decompose Time-Series Data into Trend, Seasonal, and Residual Components
Use Python statsmodels to decompose daily temperature time-series data into trend, seasonal, and residual components, saving each component to separate CSV files.
4. Corrected Order Pairing
SELECT
CASE
WHEN order_id % 2 != 0
AND order_id = (
SELECT
MAX(order_id)
FROM
orders
) THEN order_id
WHEN order_id % 2 != 0 THEN order_id + 1
ELSE order_id - 1
END AS corrected_order_id,
item
FROM
orders
ORDER BY
corrected_order_id;
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