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

Snowflake

Medium

Machine Learning Engineer Locked

Core Components of LLM Agent Memory: What Each Stores and How It Is Written and Read

Explain the common components of an LLM agent's memory, from the context window to session, episodic, semantic and procedural memory, and how each is ...

Machine LearningAI AgentsLLM Applications

Design a Collaborative Todo List

Design a collaborative todo-list service — think shared lists where teammates add, edit, assign, reorder, and complete items, and see each other's cha...

System DesignReal-Time SystemsConsistency & Availability

Software Engineer Locked

Explain the ReAct Agent Loop

Explain a ReAct tool loop through state, action selection, observations, recovery, stopping criteria, and validation of task completion.

Machine LearningAI AgentsPrompt Engineering

Software Engineer Locked

Simulate Transaction Lock Scheduling

This question evaluates understanding of concurrency control, lock scheduling, transaction state management, and queuing behavior in the Coding & Algo...

Software Engineer Locked

Build an Account Transfer Ledger

This question evaluates the ability to implement transaction processing, state management, validation of transfers (including rejects and platform len...

Coding & AlgorithmsPayments & LedgersData Structure Design

Design a Localized Usage-Limit Response and Compose Snackbar

In an Android chat-app exercise, a message request can fail because the selected model has reached its usage limit. Design the API error data and Comp...

Software Engineering FundamentalsAndroidAPI Design

10 people solved

Aug 27, 2026

Sum the Values of a Binary Search Tree That Fall Within an Inclusive Range

Given a binary search tree with distinct node values and two integers low and high, return the sum of every node value v with low <= v <= high. Return...

Coding & AlgorithmsTrees

Design and Analyze Airbnb Locker Experiment

Airbnb is considering launching a luggage locker feature that lets guests store their bags before their scheduled check-in time, so they don't have to...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout

Split into Equal-Sized Groups with Closest Sums

Problem Given an array nums of length 2 * n, divide all its entries into two groups containing exactly n entries each. The groups need not be contiguo...

Coding & AlgorithmsBacktracking & RecursionBinary Search

16 people solved

Asana

Medium

Software Engineer Locked

Design a Testable 2048 Game Engine

Design a testable 2048 game engine with correct movement, merging, restart, and game-over behavior. Explore clean object boundaries, injected tile gen...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines

Implement a Transactional Key-Value Store

Design an in-memory key-value store that supports transactions. Required operations: - set(key, value): assign or overwrite the value for a key. - get...

Coding & AlgorithmsData Structure DesignStacks & Queues

Software Engineer Locked

Simulate a TTL Cache with LRU Eviction

Simulate a fixed-capacity cache that combines per-key TTL expiration with LRU eviction. Process timestamped operations deterministically, distinguish ...

Software EngineerSenior+

Walk Through an Agentic RAG Assistant for On-Call Tickets and Chat Questions

After a short coding problem, the interviewer in this senior loop spends most of the round on an AI system listed on your resume. You are asked to dra...

ML System DesignRetrieval-Augmented GenerationAI Agents

Software Engineer Locked

Implement lazy array and KV store

This question evaluates understanding of lazy evaluation and functional transformation chaining for a LazyArray alongside in-memory data structure des...

Coding & AlgorithmsData Structure Design

Data ScientistSenior+ Locked

Calculate Monthly Restaurant Sales Growth

A PostgreSQL interview problem about calculating month-over-month restaurant sales growth. It tests monthly aggregation, window functions, missing pri...

Data Manipulation (SQL/Python)

Implement an Alert Execution Engine

You are given an alert client API that provides alert configurations, metric query execution, and notification methods. Implement an alert execution e...

Project Deep Dive: Leading a Large-Scope Product Launch, With API Questions

In a project deep-dive round, present a recent product launch that you led. In the reported interview, the launch had a large scope but only moderate ...

Behavioral & LeadershipProject Deep DiveAPI Design

Evaluate a B2B Booking Product for Travel Agents at Agoda

You are a product manager at Agoda, and the team is debating whether to build a dedicated portal that travel agents would use to book stays for their ...

Product Design & StrategyProduct StrategyBusiness Case Analysis

Data ScientistIntern Locked

Bound the Rank of BA Given Rank of AB

For real 4 by 4 matrices with rank(AB) = 2, determine the possible range of rank(BA).

Machine Learning Engineer AI

ML System Design: Movie Recommendation Model and Pipeline (AI-Assisted Round)

ML System Design: Movie Recommendation Model and Pipeline (AI-Assisted Round) This is a hands-on, AI-assisted coding round: you are allowed to use AI ...

ML System DesignRecommendation SystemsAI-Assisted Development

175 people solved

Feb 10, 2026

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Tech Interview Questions

Core Components of LLM Agent Memory: What Each Stores and How It Is Written and Read

Design a Collaborative Todo List

Explain the ReAct Agent Loop

Simulate Transaction Lock Scheduling

Build an Account Transfer Ledger

Design a Localized Usage-Limit Response and Compose Snackbar

Sum the Values of a Binary Search Tree That Fall Within an Inclusive Range

Design and Analyze Airbnb Locker Experiment

Split into Equal-Sized Groups with Closest Sums

Design a Testable 2048 Game Engine

Implement a Transactional Key-Value Store

Simulate a TTL Cache with LRU Eviction

Walk Through an Agentic RAG Assistant for On-Call Tickets and Chat Questions

Implement lazy array and KV store

Calculate Monthly Restaurant Sales Growth

Implement an Alert Execution Engine

Project Deep Dive: Leading a Large-Scope Product Launch, With API Questions

Evaluate a B2B Booking Product for Travel Agents at Agoda

Bound the Rank of BA Given Rank of AB

ML System Design: Movie Recommendation Model and Pipeline (AI-Assisted Round)

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