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

AmazonMicrosoftGoogleBloomberg

Medium

Software Engineer

Enumerate Fixed-Size Distinct Digit Combinations

Problem Return all combinations of exactly k different numbers chosen from 1 through 9 whose sum is n. Use each number at most once. Do not return a c...

Coding & AlgorithmsBacktracking & Recursion

Solve 12 coding interview problems

Below are multiple independent coding problems. --- Problem 1: Reduce an integer to 0 with $\pm 2^i$ You are given a positive integer $n$. In one ...

Coding & AlgorithmsDynamic ProgrammingBinary Search

Software Engineer Locked

Match Registered Word Queries Against a Log Stream

Process an ordered stream that registers word queries and reports which prior queries fully match each log message. The specification fixes query IDs,...

Frontend Engineer Locked

Build a Credit Card Form With Validation and Linked Input Fields

A front-end UI coding question: build a credit card form with card number, name, expiry and security code, where every field is validated and the fiel...

Software Engineering FundamentalsUI Components & AccessibilityState Management

Locate Any Strict Peak in a Matrix

Problem No side-adjacent entries of rectangular mat are equal. A peak exceeds every existing up, down, left, and right neighbor; outside neighbors hav...

Coding & AlgorithmsBinary SearchGrids & Matrices

11 people solved

Amazon

Medium

Software EngineerSenior+

Versioned Integer Array with Snapshots and Point-in-Time Reads

Build a fixed-length array of integers that remembers its history. Every element starts at 0. You can change elements, take numbered snapshots of the ...

Coding & AlgorithmsData Structure DesignBinary Search

Software Engineer Locked

Implement IP Address Arithmetic

This question evaluates proficiency in IP addressing, parsing and validation, binary/address-space arithmetic, CIDR subnet calculation, and formatting...

Recover Durable Workflows with External Effects and Long Waits

Design durable execution and recovery for a distributed DAG workflow system. Workers can crash or lose connectivity, tasks can have irreversible exter...

System DesignJob Scheduling & WorkflowsDistributed Transactions & Idempotency

Implement run-length encoding and decoding

You are given a string consisting of lowercase English letters. You need to implement run-length encoding (RLE) and its corresponding decoding. 1. Enc...

Coding & AlgorithmsArrays & Strings

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

Iterate NestedInteger Contents in Their Original Flattened Order

Problem Implement NestedIterator(vector<NestedInteger>&), next() and hasNext(). Flatten nested lists in left-to-right depth-first order. The caller re...

Coding & AlgorithmsData Structure DesignStacks & Queues

9 people solved

Oscar

Easy

Software EngineerSenior+ Locked

Design a Stateful Outreach Campaign Engine

Design a per-client outreach campaign that sends email and timed text follow-ups, stops on response, and records terminal failure or unresponsiveness....

Software Engineer Locked

Implement a Finite Concurrent Web Crawler

Implement a finite concurrent web crawler with transactional URL deduplication, a bounded disk-backed frontier, polite fetching, lossless discovery, c...

Software Engineering Fundamentals

123 people solved

Aug 14, 2026

Design Ride Requests, Driver Matching, and Trip State

Design a ride-sharing backend with fresh locations, candidate search, conflict-free assignment, idempotent trip transitions, and failure recovery.

System DesignGeo & Delivery SystemsDistributed Coordination

Detect a Length-Two-or-More Multiple-Sum Segment

Problem Return whether nums contains a contiguous subarray of at least two elements whose sum is an integer multiple of positive k. Zero is a multiple...

Coding & AlgorithmsArrays & StringsMath & Number Theory

7 people solved

Cloudflare

Medium

Software Engineer Locked

Design an encrypted log collection system

This question evaluates competence in distributed systems design, secure transport and storage, encryption and key management, scalability, and observ...

System DesignObservabilityCryptography

185 people solved

Jan 22, 2026

Medium

Software Engineer Locked

Design Blackjack Hands, Splits, and a Multi-Deck Shoe

Design the core object model for a blackjack game. Make the API or object boundaries explicit, then cover invariants, edge cases, testing strategy, an...

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

Diagnosing a Venmo Sign-Up Conversion Collapse to 2% After a UX Redesign

You are a product manager on Venmo, PayPal's peer-to-peer payments app. After a new user experience was rolled out, the sign-up rate fell to 2%. What ...

Analytics & ExperimentationMetric DiagnosticsUser Behavior & Funnels

13 people solved

Oct 12, 2026

GoogleAmazonMicrosoftBloomberg

Medium

Software Engineer

Count Index Pairs That Disagree with Their Value Difference

Problem A pair of indices (i, j) is bad when i < j and j - i != nums[j] - nums[i]. Return the number of bad pairs in nums as a long long. `cpp class S...

Coding & AlgorithmsArrays & StringsMath & Number Theory

14 people solved

Amazon

Hard

Software Engineer Locked

Minimize Replacements So Equal Product Values Are Contiguous

Minimize the replacement cost needed so every remaining product value occupies one contiguous block, where one operation changes all occurrences of on...

Coding & AlgorithmsIntervals & Scheduling

219 people solved

Jul 12, 2026

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Tech Interview Questions

Enumerate Fixed-Size Distinct Digit Combinations

Solve 12 coding interview problems

Match Registered Word Queries Against a Log Stream

Build a Credit Card Form With Validation and Linked Input Fields

Locate Any Strict Peak in a Matrix

Versioned Integer Array with Snapshots and Point-in-Time Reads

Implement IP Address Arithmetic

Recover Durable Workflows with External Effects and Long Waits

Implement run-length encoding and decoding

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

Iterate NestedInteger Contents in Their Original Flattened Order

Design a Stateful Outreach Campaign Engine

Implement a Finite Concurrent Web Crawler

Design Ride Requests, Driver Matching, and Trip State

Detect a Length-Two-or-More Multiple-Sum Segment

Design an encrypted log collection system

Design Blackjack Hands, Splits, and a Multi-Deck Shoe

Diagnosing a Venmo Sign-Up Conversion Collapse to 2% After a UX Redesign

Count Index Pairs That Disagree with Their Value Difference

Minimize Replacements So Equal Product Values Are Contiguous

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