Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

18.6k

Companies

980

Updated

11.12.2026

18.6k Questions 980 Companies11.12.2026

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

GoogleMetaAmazonBloomberg

Easy

Software Engineer

Digit Product Minus Digit Sum

Problem For positive integer n, multiply its decimal digits and separately add them. Return the product minus the sum. `cpp class Solution { public: ...

Coding & AlgorithmsMath & Number Theory

6 people solved

Google

Medium

Machine Learning Engineer

Design a Product or Video Recommendation System

Design a recommendation system for a large consumer platform. The platform may recommend either products in an e-commerce feed or videos in a media fe...

ML System DesignRecommendation SystemsRanking Models

Explain Transformers and QKV matrices

Transformer Self-Attention: Q, K, V, Multi-Head, and Positional Encoding You are given a sequence of token embeddings $X$ (sequence length $n$, model ...

Machine LearningTransformers & Attention

Software Engineer Locked

Process exchange prints, volume checks, and client orders

This question evaluates a candidate's ability to implement real-time stream processing, sliding-window aggregation for time-based volume calculations,...

Coding & AlgorithmsSimulation & State MachinesTrading Systems

Handle extended team-matching uncertainty

Scenario: Team-Match Stall After Panel Context - You passed a company-wide panel in late February for a Data Scientist role. - First team-match meetin...

Behavioral & Leadership

In-Memory Bank Account System: Create, Deposit, Transfer and Merge Accounts

Implement an in-memory bank account system as a class. The report lists four capabilities: creating accounts, depositing money into an account, transf...

Software Engineering FundamentalsData Structure Design

Select the best dasher for an order

You need to assign an order to a dasher. Input: - An order with a pickup location (x, y). - A list of dashers, each with: - id - current location ...

Design an intersection traffic-light system

System Design: Traffic-Light Control for a Multi-Road Intersection Context Design the software and systems for controlling a signalized, multi-approac...

System DesignSystem Design FundamentalsSimulation & State Machines

Describing Your Personal Interest in AI for a PM Role at an AI Company

In a product manager interview at an AI company, the interviewer asks you to talk about what draws you to AI. What do you say? `hint Show it rather th...

Behavioral & LeadershipMotivation & FitAI Product Management

17 people solved

Apr 7, 2026

Medium

Data ScientistSenior+

Query US-based users and most active forums

You are given user and post data for an online forum platform. Tables (schemas) Assume the following tables: users - user_id BIGINT (PK) - home_countr...

Data Manipulation (SQL/Python)SQL

Software EngineerSenior+ Locked

Explain Platform Evolution, Ownership, and Career Motivation

Explain a platform’s evolution, your exact ownership, the trade-offs behind changes, and a concrete, professional motivation for the next role.

Behavioral & LeadershipProject Deep DiveMotivation & Fit

Machine Learning Engineer

Define QKV for recommender cross-attention

You are designing a deep-learning–based recommendation system that uses a Transformer-style cross-attention block to model the interaction between a u...

Machine Learning

101 people solved

Dec 8, 2025

Design Place Recommendation System

Design a machine learning system for a maps or local-discovery product that recommends places a user may want to visit. The system should provide pers...

ML System DesignRecommendation SystemsRanking Models

Design a global restaurant menu update system

Design a menu update system for a global chain of restaurants. Context: - The chain operates in many countries. - Each restaurant may have multiple ki...

System DesignSystem Design FundamentalsFault Tolerance & Failover

Machine Learning Engineer Locked

Design O(1) cache and moving average

This question evaluates proficiency in data structures and streaming algorithms by combining an O(1) cache design with an eviction policy and a fixed-...

Coding & Algorithms

98 people solved

Jan 22, 2026

Design an image copyright-violation detection system

This question evaluates competency in designing scalable machine learning systems for image copyright detection, testing knowledge across computer vis...

ML System DesignComputer VisionEmbeddings & Vector Search

Design a real-time delivery dashboard

System Design: Real-Time Delivery Operations Dashboard Context Design a real-time operations dashboard for a two-sided delivery platform. The dashboar...

System DesignReal-Time SystemsGeo & Delivery Systems

Data ScientistSenior+

Simulate Uniform(0,1) from random bits

Assume you have access to a function rand_bit() that returns 0 or 1 with equal probability and independent across calls. How would you generate a rand...

Apply sliding window techniques

Apply sliding window techniques Explain the sliding window technique and apply it to solve: ( 1) Given an array of positive integers and a target S, r...

Coding & AlgorithmsTwo Pointers & Sliding Window

189 people solved

Aug 7, 2025

GoogleMetaAmazonGoldman Sachs

Medium

Software Engineer

Recover Entries from a Shuffled Doubled Multiset

Problem An original array is doubled by appending twice every original value and then shuffling all entries. Given the nonnegative array changed, retu...

Coding & AlgorithmsArrays & StringsSorting

10 people solved

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Tech Interview Questions

Digit Product Minus Digit Sum

Design a Product or Video Recommendation System

Explain Transformers and QKV matrices

Process exchange prints, volume checks, and client orders

Handle extended team-matching uncertainty

In-Memory Bank Account System: Create, Deposit, Transfer and Merge Accounts

Select the best dasher for an order

Design an intersection traffic-light system

Describing Your Personal Interest in AI for a PM Role at an AI Company

Query US-based users and most active forums

Explain Platform Evolution, Ownership, and Career Motivation

Define QKV for recommender cross-attention

Design Place Recommendation System

Design a global restaurant menu update system

Design O(1) cache and moving average

Design an image copyright-violation detection system

Design a real-time delivery dashboard

Simulate Uniform(0,1) from random bits

Apply sliding window techniques

Recover Entries from a Shuffled Doubled Multiset

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ML System Design

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