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

Pony.Ai

Medium

Software Engineer Locked

Implement a Min-Heap with Insert and Remove-Min

Implement a minimum binary heap from scratch in a zero-indexed array, supporting insertion and removal of the smallest value. Handle duplicate and neg...

Implement stack variants and upward path sum

Question Answer the following coding questions. They progress from augmented stacks to streaming statistics to tree path reasoning. 1. MinStack — Desi...

Find the Minimum Word Transformation Steps

Problem Transform a start word into an end word by changing exactly one character at a time. Every intermediate word and the end word must belong to t...

Defend a Data Pipeline Architecture and Its Trade-offs

Prompt Choose one production data pipeline that you personally designed or substantially changed. Walk through its architecture, the requirements that...

Software Engineer Locked

Find the Probability That the Three Smallest Dice Sum to Three

Roll four independent fair six-sided dice. Explain the assumptions and derivation clearly, check edge cases, and show how the result changes when thos...

Product design: an applicant tracking system for recruiters, managers and candidates

Design an applicant tracking system (ATS): the product employers use to open roles, collect applications and move candidates through interviews to an ...

Product Design & StrategyProduct Sense

Machine Learning Engineer

Compute nearest index within threshold after walking distances

You are given: ( 1) points: a list of N 2D coordinates in miles, points[i] = [x_i, y_i], ordered; ( 2) distances: a list of M nonnegative floats (mile...

Data Manipulation (SQL/Python)

68 people solved

Aug 12, 2025

Qube Research & Technologies

Medium

Software Engineer

Implement a type-erased function wrapper

Implement a minimal std::function-like callable wrapper in C++ using type erasure via inheritance and a virtual call. Define a template Function<R(Arg...

Coding & AlgorithmsProgramming LanguagesMemory Management

Maintain real-time top-K products from events

Design a data structure/class that ingests a stream of product events and returns the current top‑K products at any time. Events include {timestamp, p...

Software Engineer Locked

Write Pseudocode for Embedding Creation and Vector Search

Write production-oriented pseudocode for batched document embedding and vector upserts plus filtered similarity search, including chunk identity, idem...

Deep-dive a project architecture

Question Pick one of your recent, non-trivial projects and conduct a deep, end-to-end technical review. This is an open-ended architecture deep-dive: ...

System DesignProject Deep DiveSystem Design Fundamentals

467 people solved

Jul 31, 2025

Qube Research & Technologies

Hard

Software Engineer Locked

Explain left-skewed returns and Black–Scholes terms

This question evaluates understanding of quantitative finance and statistical concepts—specifically interpretation of left-skewed return distributions...

Software Engineering Fundamentals

Machine Learning Engineer

Handle Cross-Team Dependencies and Scope Conflicts

Answer the following behavioral interview questions using a concrete example from your experience: 1. You depend on another team to complete work, but...

Behavioral & Leadership

Uber After Driverless Cars Mature: Anticipate the Biggest Problems and Plan Responses

Imagine it is 2050 and fully driverless cars are a mature, solved technology. As a product manager, identify the problems Uber is likely to face in th...

Product Design & StrategyProduct StrategyMarket & Competitive Analysis

Design an in-memory database

Design an in-memory database System Design: In-Memory Database Engine (Single-Node Core, Scale-Out Aware) Context Design the core of an in-memory, sin...

System DesignDatabase InternalsTransactions & Isolation

Software Engineer Locked

Find Intersections Between Two Interval Lists

Find every non-empty intersection between two sorted lists of disjoint closed intervals. Preserve ascending order and correctly include intersections ...

Compute height of tree with deleted nodes; minimize deletions

You are given a rooted tree (not necessarily binary). Each node has a list of children. Some nodes are marked as deleted = true. Define the effective ...

Coding & AlgorithmsTreesDynamic Programming

Design an Elevator Control System

Design an object-oriented elevator control system for a building with multiple floors and multiple elevators. The system should support: - Hall reques...

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

Implement Binary Search in C++

From scratch in C++, implement binary search over a sorted array to locate a target value. Provide a correct iterative implementation, handle not-foun...

Coding & AlgorithmsBinary Search

Describe relevant PM experience

You are interviewing for a Product Manager role at OpenAI. Prepare outcome-oriented behavioral answers for these prompts: 1. Tell me about your experi...

Behavioral & LeadershipMetrics & KPIsExperiment Design (A/B Testing)

241 people solved

Mar 29, 2025

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Tech Interview Questions

Implement a Min-Heap with Insert and Remove-Min

Implement stack variants and upward path sum

Find the Minimum Word Transformation Steps

Defend a Data Pipeline Architecture and Its Trade-offs

Find the Probability That the Three Smallest Dice Sum to Three

Product design: an applicant tracking system for recruiters, managers and candidates

Compute nearest index within threshold after walking distances

Implement a type-erased function wrapper

Maintain real-time top-K products from events

Write Pseudocode for Embedding Creation and Vector Search

Deep-dive a project architecture

Explain left-skewed returns and Black–Scholes terms

Handle Cross-Team Dependencies and Scope Conflicts

Uber After Driverless Cars Mature: Anticipate the Biggest Problems and Plan Responses

Design an in-memory database

Find Intersections Between Two Interval Lists

Compute height of tree with deleted nodes; minimize deletions

Design an Elevator Control System

Implement Binary Search in C++

Describe relevant PM experience

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