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

Calculate survey response and quality metrics in SQL

Compute survey response-rate and quality metrics from event data. Assume "today" = 2025-09-01, and compute over the last 7 days (2025-08-26 to 2025-09...

Data Manipulation (SQL/Python)

Airbnb Product Sense: Scoping and Designing an In-App 'Experience' Feature

You are a product manager at Airbnb, asked to design "Airbnb Experience" as part of the Airbnb app. Decide what the feature should be, choose the user...

Product Design & StrategyProduct Sense

Software Engineer Locked

Design an async job system and cache layer

This question evaluates system design competencies including asynchronous job orchestration, reliable background processing (state transitions, retrie...

System DesignSystem Design FundamentalsCaching

Implement DFS with cycle detection and topo order

Implement DFS (recursive and iterative) with topo sort, cycle detection, and timestamps You are given a directed graph G with N nodes labeled 1..N and...

Coding & AlgorithmsGraphsStacks & Queues

Explain K-Fold Cross-Validation and Its Trade-Offs

Explain K-Fold Cross-Validation and Its Trade-Offs Technical Phone Screen: Cross-Validation Task You are interviewing for a Data Scientist role. Expla...

Software Engineer Locked

Format Words into Fixed-Width Lines

This question evaluates proficiency in string manipulation, greedy line-packing algorithms, and attention to implementation details such as spacing di...

Amazon PM behavioral: how you uncover real customer needs, shown through an example

You are interviewing for a product manager role at Amazon, and the interviewer asks how you figure out what customers want and need. Explain the appro...

Behavioral & LeadershipUser Research & Discovery

Grow Amazon's Store Sales: Pick the Growth Lever, Target Shoppers and Success Metrics

You are a product manager at Amazon, and leadership wants to know how you would grow the company's sales. Explain which part of the business and which...

Product Design & StrategyGrowth & MonetizationMetrics & KPIs

9 people solved

Jun 3, 2026

Easy

Machine Learning Engineer

Design a Comment Ranking System for Threaded Post Discussions

Design the system that ranks the comments under a post on a large online discussion platform. Assume users write comments on posts, reply to each othe...

ML System DesignRanking ModelsModel Evaluation

Implement DFS and tree algorithms

Part 1 (DFS on graph): Given an undirected graph with n nodes labeled 0..n-1 and an edge list, implement a function that returns all connected compone...

Count subarrays with product under target

Given an array of positive integers nums and an integer T > 1, return the number of contiguous subarrays whose product is strictly less than T. Provid...

Estimation Case: Packing Soccer Balls Onto a Soccer Pitch

Estimate how many soccer balls can fit on a soccer field. Walk the interviewer through how you frame the problem, the assumptions you make, your arith...

Product / Decision MakingEstimation & Market Sizing

Resolve Conflicting A/B Test Results in Cities

A/B Test Paradox Across Two Cities You ran an A/B test in two geographies, City X and City Y. Within each city, variant A outperforms variant B. Howev...

Analytics & Experimentation

Managing a Data Science Team: Priorities, Communication and Engineering Partnership

This data science role includes managing a team, and several interview conversations probe how you lead: how you manage the team, how you set prioriti...

Behavioral & LeadershipMentoring & Team GrowthCommunication & Stakeholders

Solve string and hashmap interview tasks

Coding questions (solve both) 1) First non-repeating character Given a string s, return the first character that appears exactly once in the string. -...

Coding & AlgorithmsArrays & Strings

Calculate Incremental Customers for Marketing Spend Justification

Incremental Customers Needed for Marketing Spend You previously computed the per-customer annual profit for a new cardholder, excluding partnership ma...

Statistics & MathBusiness Case Analysis

Measure Late Deliveries and Identify Top Delayed Restaurants

orders +----------+---------+--------------+---------------------+-------------------------+-----------------------+ | order_id | user_id | restaurant...

Data Manipulation (SQL/Python)SQLMetrics & KPIs

Defend a mobile OS preference and design a product that exploits that platform

An interviewer asks whether you prefer iOS or Android, then asks you to design a product of your own choosing for the platform you picked. Answer both...

Product Design & StrategyProduct SensePrioritization & Tradeoffs

6 people solved

Aug 11, 2026

Implement exponentiation and fill grid distances

This question evaluates algorithmic problem-solving skills in the Coding & Algorithms domain, specifically numeric algorithms for fast exponentiation ...

Coding & AlgorithmsMath & Number TheoryGrids & Matrices

Software Engineer Locked

Implement an LFU cache with O(1) operations

This question evaluates a candidate's ability to design and implement efficient data structures for caching, including understanding frequency-based e...

Coding & Algorithms

93 people solved

Feb 11, 2026

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Tech Interview Questions

Calculate survey response and quality metrics in SQL

Airbnb Product Sense: Scoping and Designing an In-App 'Experience' Feature

Design an async job system and cache layer

Implement DFS with cycle detection and topo order

Explain K-Fold Cross-Validation and Its Trade-Offs

Format Words into Fixed-Width Lines

Amazon PM behavioral: how you uncover real customer needs, shown through an example

Grow Amazon's Store Sales: Pick the Growth Lever, Target Shoppers and Success Metrics

Design a Comment Ranking System for Threaded Post Discussions

Implement DFS and tree algorithms

Count subarrays with product under target

Estimation Case: Packing Soccer Balls Onto a Soccer Pitch

Resolve Conflicting A/B Test Results in Cities

Managing a Data Science Team: Priorities, Communication and Engineering Partnership

Solve string and hashmap interview tasks

Calculate Incremental Customers for Marketing Spend Justification

Measure Late Deliveries and Identify Top Delayed Restaurants

Defend a mobile OS preference and design a product that exploits that platform

Implement exponentiation and fill grid distances

Implement an LFU cache with O(1) operations

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