Instacart Interview Questions
Practice the exact questions companies are asking right now.
"10 years of experience but never worked at a top company. PracHub's senior-level questions helped me break into FAANG at 35. Age is just a number."
"I was skeptical about the 'real questions' claim, so I put it to the test. I searched for the exact question I got grilled on at my last Meta onsite... and it was right there. Word for word."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"I've used LC, Glassdoor, and random Discords. Nothing comes close to the accuracy here. The questions are actually current — that's what got me. Felt like I had a cheat sheet during the interview."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"Literally just signed a $600k offer. I only had 2 weeks to prep, so I focused entirely on the company-tagged lists here. If you're targeting L5+, don't overthink it."
"Coaches and bootcamp prep courses cost around $200-300 but PracHub Premium is actually less than a Netflix subscription. And it landed me a $178K offer."
"I honestly don't know how you guys gather so many real interview questions. It's almost scary. I walked into my Amazon loop and recognized 3 out of 4 problems from your database."
"Discovered PracHub 10 days before my interview. By day 5, I stopped being nervous. By interview day, I was actually excited to show what I knew."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"The search is what sold me. I typed in a really niche DP problem I got asked last year and it actually came up, full breakdown and everything. These guys are clearly updating it constantly."
Decode an encoded string
Implement a decoder for an encoded string where repetition is expressed with a number followed by a bracketed substring. Rules: - A pattern k[substrin...
Implement worker time and payroll tracker
You are building an in-memory worker management module. Each worker has metadata and a history of office attendance intervals. Implement the following...
Evaluate an arithmetic expression
Write a function that evaluates a mathematical expression given as a string. Requirements: - Supports non-negative integers and whitespace. - Supports...
Simulate bus boarding with priority and wheelchairs
You are implementing a simplified bus boarding simulator. Model: - Person has at least: - id (string/int) - priority (boolean): if true, they shou...
Implement multiple coding round problems
Solve the following coding problems. 1) Bus schedule (next departure) Given: - A sorted list buses[] of bus departure times (minutes since 00:00). - A...
Implement timestamped task management system APIs
You are implementing an in-memory Task Management System. All API methods are called with a timestamp representing the logical time when the operation...
Decode a password string into letters
A password is encoded as a string s using the following rules: - Numbers "1" to "9" map to letters a to i. - Numbers "10#" to "26#" (two digits follow...
Explain how to understand a large codebase fast
You are given an unfamiliar, large codebase with many classes and modules. You may use an IDE (jump-to-definition, find usages, call hierarchy) and AI...
Implement bus route simulation features
Bus Route Simulation – Boarding, Capacity, and Priority Passes You are given a partially implemented codebase for simulating bus routes in a city. Bus...
Design a pricing experiment with network effects
Scenario You want to launch a new pricing model that incentivizes shoppers to place/pick up more orders during rush hours in a two-sided marketplace (...
Evaluate query ratios from equations
You are given equations of the form A / B = value where A and B are variable names (strings) and value is a positive real number. You also receive que...
Design an inventory management system
Design an inventory management system for an e-commerce business. The system must support: - Updating stock when inventory is received, adjusted, or s...
Design product catalog service
System Design: Product Catalog Service for an E-commerce Platform Context You are designing the product catalog service for a large consumer e-commerc...
Design an inventory system
System Design: Inventory Management with Real-Time Stock and Ordering Context You are designing an inventory management service for a retail/marketpla...
How would you investigate a metric decline?
Scenario You are a Data Scientist supporting a consumer marketplace product. A key business metric (e.g., orders/day, conversion rate, revenue, profit...
Design scalable inventory system and avoid races
System Design: Scalable, Highly Available Inventory Management Context Design an inventory management system for a high-traffic e-commerce platform th...
Design a task system with assignments
You are implementing an in-memory task management system (no database required). The system needs basic CRUD features and some ranking/sorting functio...
How to debug an apparent D14 retention drop
Scenario A dashboard shows D14 retention (users retained on day 14 after signup/first activity). In the last week, the chart shows a sharp decline. As...
Choose tests under non‑normal, unequal variance
Heavy-Tailed, Heteroskedastic Metrics in A/B Tests (AOV example) Context: You are comparing two groups in an A/B test on a spend metric (e.g., Average...
Compute duration and stopping rules correctly
Experiment Runtime Planning: Same‑Day Delivery Attach Rate You are planning an A/B test on the same‑day delivery attach rate (the proportion of eligib...