Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

12.2k

Companies

569

Updated

10.14.2026

12.2k Questions 569 Companies10.14.2026

PLTCHK

"I got asked a hardcore MCM DP question and I saw it on PracHub as well. Solved that question in 5 minutes. Without PracHub I doubt I could solve it in 5 hours. Though somehow didn't get hired, perhaps I guess I solved it too fast? /s"

_The_TaNk_

"Believe me i'm a student here jn US. Recently interviewed for MSFT. They asked me exact question from PracHub. I saw it the night before and ignored it cause why waste time on random sites. I legit wanna go back and redo this whole thing if I had chance. Not saying will work for everyone but there is certainly some merit to that website. And i'm gonna use it in future prep from now on like lc tagged"

ChrisSenior SWE, LinkedIn

"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."

sleepy33

"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."

JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99

"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."

ShrutiData Engineer, Salesforce

"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."

midnightramen

"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."

BiancaFrontend Eng, Figma

"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."

tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa

"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."

PLTCHK

_The_TaNk_

ChrisSenior SWE, LinkedIn

"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."

sleepy33

"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."

JakeSenior ML Engineer, Lyft

"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."

nuggetlord

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes

"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."

AndySWE-II, Google

"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."

couchpotato99

"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."

ShrutiData Engineer, Salesforce

"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."

midnightramen

"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."

BiancaFrontend Eng, Figma

"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."

tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa

"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."

Showing 20 results

Instacart

Medium

Software Engineer

Implement matrix-indexing and expression resolver

Question Given a text file path whose contents include a single block starting with a line like "[2,4]" followed by rows of equal-length characters (e...

Project deep dive: full architecture diagram, design decisions and business impact

Several rounds of this interview loop were built around the candidate's own work. The phone screen opened with a detailed walkthrough of a past projec...

Behavioral & LeadershipProject Deep DiveSystem Design Fundamentals

Decide string transform with directional tokens and walls

Decide string transform with directional tokens and walls You are given two equal-length strings start and target of length n, each consisting only of...

Solve sliding-window and heap problems

Question Design an algorithm using a sliding window to compute the maximum sum of any contiguous subarray of length k; explain time- and space-complex...

Understand SQL Aggregations and Joins: Key Differences Explained

Employees +----+--------+--------+---------+ | id | name | salary | dept_id | +----+--------+--------+---------+ | 1 | Alice | 70000 | 1 | ...

Data Manipulation (SQL/Python)

Software Engineer Locked

Detect overlap of two linked lists with cycles

This question evaluates understanding of linked list data structures, cycle detection techniques, pointer/reference identity, and algorithmic time/spa...

Minimize calls to find all bad test pairs

You have $n$ atomic tests $t_1, t_2, \dots, t_n$. You are given access to a black-box function: `python bool runTest(set<Test> S) ` which behaves ...

Coding & AlgorithmsGraphs

Design A/B Test for Streaming Feature Network Effects

Design A/B Test for Streaming Feature Network Effects A/B Test Design With Potential Social-Network Spillovers (Streaming Platform) Context You are de...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference

Software Engineer Locked

How do you review a design document?

This question evaluates proficiency in reviewing design documents, including requirements and scope, architecture and data flow, correctness and secur...

Software Engineering FundamentalsSystem Design Fundamentals

Software Engineer Locked

Design an autocomplete suggestions API

This question evaluates understanding of string-oriented data structures (e.g., prefix trees/tries), ranked retrieval and dynamic updates, testing ski...

Coding & AlgorithmsTrees

Implement sliding-window rate limiter with dual thresholds

Implement getRequestStatus(urls: List[str]) -> List[str]. The i-th entry in urls represents a single incoming request at timestamp t = i seconds (t st...

Build a package-allocation model for couriers

Automatic Package-to-Courier Assignment with ML + Optimization You previously assigned packages to couriers manually. Design an end-to-end system that...

Implement deduped CTR/RPM aggregator over event stream

Implement a Python function to compute per-day, per-campaign CTR and RPM from an event stream with possible out-of-order and duplicate click events. I...

Data Manipulation (SQL/Python)

Machine Learning Engineer

Count connected delivery zones

Given an m x n grid representing a service area, each cell is either 'Z' (deliverable zone) or '#' (blocked). Two 'Z' cells belong to the same zone if...

Coding & AlgorithmsGrids & Matrices

Market Sizing & Product Metrics Drill

Estimation and Product Metrics Drill Provide best-effort estimates using clear assumptions. Give a single-number answer and a justified range for esti...

Product / Decision Making

Machine Learning Engineer

Compute Conv2D parameter counts

Parameter Count for a 2D Convolution Layer You are given a standard 2D convolution layer with: - Input channels: C_in - Output channels: C_out - Kerne...

Machine LearningComputer Vision

Compute task order with prerequisites

Given an integer n representing tasks labeled 0..n-1 and a list of prerequisite pairs (a, b) meaning b must be completed before a, return any valid or...

Coding & AlgorithmsGraphs

Design an Uber A/B experiment end-to-end

Experiment Design: Pickup ETA Card Redesign Context: After a rider requests a trip, the app shows a pickup ETA card. The hypothesis is that clearer ET...

Analytics & ExperimentationExperiment Design (A/B Testing)Hypothesis Testing

Find first and last index of target

You are given an integer array nums sorted in non-decreasing order and an integer target. Return a pair [left, right] where: - left is the index of th...

Software EngineerIntern Locked

Print all odd numbers from an integer list

This question evaluates proficiency with array/list manipulation, parity checking, and handling edge cases such as negative values and integers outsid...

Coding & AlgorithmsArrays & Strings

100 people solved

Jan 22, 2026

Tech Interview Questions

Implement matrix-indexing and expression resolver

Project deep dive: full architecture diagram, design decisions and business impact

Decide string transform with directional tokens and walls

Solve sliding-window and heap problems

Understand SQL Aggregations and Joins: Key Differences Explained

Detect overlap of two linked lists with cycles

Minimize calls to find all bad test pairs

Design A/B Test for Streaming Feature Network Effects

How do you review a design document?

Design an autocomplete suggestions API

Implement sliding-window rate limiter with dual thresholds

Build a package-allocation model for couriers

Implement deduped CTR/RPM aggregator over event stream

Count connected delivery zones

Market Sizing & Product Metrics Drill

Compute Conv2D parameter counts

Compute task order with prerequisites

Design an Uber A/B experiment end-to-end

Find first and last index of target

Print all odd numbers from an integer list

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