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

NVIDIA

Medium

Software Engineer

Discuss activities, role, and project deep dive

Discuss activities, role, and project deep dive Behavioral Onsite Prompt — Role Walkthrough, Project Deep Dive, and Professional Growth Context: You a...

Behavioral & LeadershipProject Deep DiveCommunication & Stakeholders

Machine Learning EngineerSenior+ Locked

Design email ranking and summarization in Outlook

This question evaluates proficiency in designing end-to-end machine learning systems for personalized email ranking and abstractive summarization, enc...

Compute probability at least one user uses feature

Problem Assume there are $n$ users. Each user independently uses a certain feature with probability $p$. 1) What is the probability that at least ...

Assess transition and profitability under fossil-fuel constraints

Energy One: Transition from Fossil Fuels to Renewables Context Energy One currently has a total technical maximum output of 8.8 million MWh/year. Regu...

Behavioral & LeadershipBusiness Case AnalysisMetrics & KPIs

Software Engineer Locked

Design Notifications for One Million Internal Producer Services

Design notification ingestion and delivery for a million internal producers, separating service-count scale from throughput, bursts, and fanout.

System DesignMessaging & Event-DrivenRate Limiting

Setting Strategy and a Roadmap for Proactive Help in Gemini

You are the product manager responsible for proactivity in Gemini, Google's AI assistant: help that Gemini offers on its own, before the user asks. Ho...

Product Design & StrategyProduct StrategyAI Product Management

Design a robust fraud detection system

Real-Time Card Fraud Detector — End-to-End Design Context - Fraud base rate ≈ 0.2% (severe class imbalance) - Labels arrive with a 14-day delay (e.g.,...

Machine LearningML System DesignFeature Engineering

Amazon Product Strategy: Responding When Walmart Launches in Amazon's Market

You are a product manager at Amazon, and Walmart is launching in the country where you operate. How do you respond? `hint Find the real overlap Before...

Product Design & StrategyMarket & Competitive AnalysisProduct Strategy

Software Engineer Locked

Implement a type-based mutex for tasks

This question evaluates understanding of concurrency and synchronization primitives, testing the ability to design a thread-safe type-based mutex that...

Coding & AlgorithmsConcurrency

116 people solved

Mar 1, 2026

Diagnose Mixed Reactions to an Instagram Profile Grid Redesign and Plan the Response

Instagram recently changed the profile grid, the tiled view of a person's posts on their profile, and the reaction has been mixed: some people like it...

Analytics & ExperimentationUser Research & DiscoveryLaunch Evaluation

Pushing Back on Your Manager or Senior Leaders Instead of Agreeing by Default

In a product manager interview, you are asked to describe a time when you stopped simply agreeing with your manager or senior leadership and pushed ba...

Behavioral & LeadershipConflict & CollaborationLeadership & Influence

Implement streaming per-user reservoir sampling

Design and code (in Python) a streaming algorithm that ingests an unbounded event stream of tuples (user_id, event_time, event_type) and maintains, fo...

Determine sanitized palindrome in string

Write a function that determines whether a string is a palindrome after removing non-alphanumeric characters and ignoring case (e.g., punctuation, whi...

Software Engineer Locked

Find most frequent call path in logs

This question evaluates stack-based simulation of single-threaded call traces, hierarchical path construction and frequency counting with deterministi...

Coding & AlgorithmsStacks & Queues

C++ Fundamentals: const Pointers, and map vs unordered_map

C++ Fundamentals: const with Pointers, and map vs unordered_map You are in a C++ fundamentals screening round. After the coding question, the intervie...

Software Engineering FundamentalsProgramming Languages

Find a Celebrity from a Knows Matrix

Problem Among n people, a celebrity knows nobody else and is known by everybody else. Determine the celebrity's index, or return -1 if no celebrity ex...

Implement precise string-based decimal addition

Given two non-empty strings representing decimal numbers (e.g., "123.456" and "6234.42432"), implement a function that returns their exact sum as a st...

Implement random forest with OOB and imbalance

Implement a Memory-Efficient Random Forest (Binary Classification) Under Constraints You are asked to design and implement a Random Forest for binary ...

Debug SQL join that drops rows

You’re analyzing Home Improvement retail transactions to understand sales of Mulch during promotions. After joining multiple tables, your final result...

Data Manipulation (SQL/Python)

Software EngineerNew Grad

Track the Running Median of an Integer Stream

Track the Running Median of an Integer Stream Problem Implement runningMedianTwice(values) -> mediansTwice. Process values from left to right. After e...

Coding & Algorithms

73 people solved

Dec 8, 2025

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Tech Interview Questions

Discuss activities, role, and project deep dive

Design email ranking and summarization in Outlook

Compute probability at least one user uses feature

Assess transition and profitability under fossil-fuel constraints

Design Notifications for One Million Internal Producer Services

Setting Strategy and a Roadmap for Proactive Help in Gemini

Design a robust fraud detection system

Amazon Product Strategy: Responding When Walmart Launches in Amazon's Market

Implement a type-based mutex for tasks

Diagnose Mixed Reactions to an Instagram Profile Grid Redesign and Plan the Response

Pushing Back on Your Manager or Senior Leaders Instead of Agreeing by Default

Implement streaming per-user reservoir sampling

Determine sanitized palindrome in string

Find most frequent call path in logs

C++ Fundamentals: const Pointers, and map vs unordered_map

Find a Celebrity from a Knows Matrix

Implement precise string-based decimal addition

Implement random forest with OOB and imbalance

Debug SQL join that drops rows

Track the Running Median of an Integer Stream

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