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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 testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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 testimonial
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_ testimonial
_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"

Chris testimonial
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 testimonial
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."

Jake testimonial
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 testimonial
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."

Carlos testimonial
CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

boba.tea.vibes testimonial
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."

Andy testimonial
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 testimonial
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."

Shruti testimonial
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 testimonial
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."

Bianca testimonial
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 testimonial
tambrahm007

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

toa testimonial
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
Tradedesk logo
Tradedesk
Medium
Frontend Engineer Locked

Object-Oriented Design of an Elevator Control System

An object-oriented design question asking the candidate to model an elevator control system: its classes, their responsibilities, and how a button pre...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
2
0
24 people solved
Sep 15, 2026
Fireworks Ai logo
Fireworks Ai
Medium
Software Engineer Locked

Find global GPU idle intervals

This question evaluates competency in interval reasoning, managing overlapping time ranges across distributed resources, designing online data structu...

Coding & AlgorithmsIntervals & SchedulingData Structure Design
32
0
454 people solved
Jan 6, 2026
Robinhood logo
Robinhood
Medium
Software Engineer

Produce a Deterministic Course Plan

Produce a Deterministic Course Plan There are num_courses courses numbered 0 through num_courses - 1. Each prerequisite pair is [course, prerequisite]...

Coding & AlgorithmsGraphs
17
0
186 people solved
Apr 21, 2026
Coinbase logo
Coinbase
Medium
Backend EngineerSenior+ Locked

Design a Real-Time Asset Price Service

Design a near-real-time digital asset price service that evolves from one upstream provider to several. Cover normalized ingestion, source reconciliat...

System DesignReal-Time SystemsSystem Design Fundamentals
19
0
134 people solved
Jun 12, 2026
IBM logo
IBMMetaMathWorks
Easy
Software Engineer

Make a Minimum-Change Palindrome with Lexicographic Tie-Breaking

Make a Minimum-Change Palindrome with Lexicographic Tie-Breaking You are given a string s containing only lowercase English letters. One operation rep...

Coding & AlgorithmsTwo Pointers & Sliding WindowGreedy
0
0
8 people solved
Affirm logo
Affirm
Medium
Software Engineer Locked

Aggregate loans and match repayments

This question evaluates the ability to aggregate transactional loan records and match repayment transactions to outstanding loans, testing competencie...

Coding & AlgorithmsArrays & StringsSimulation & State Machines
18
1
236 people solved
Mar 7, 2026
Lyft logo
Lyft
Hard
Software Engineer

Design a Donation Platform

Question Design an online donation platform that lets users discover and contribute to charity campaigns or nonprofit organizations. Payment execution...

System DesignPayments & LedgersDistributed Transactions & Idempotency
26
0
224 people solved
Apr 24, 2026
Rippling logo
Rippling
Hard
Software Engineer

Design a user behavior tracking system

Problem Design a User Behavior Tracking System that collects and analyzes user events from mobile and web applications across multiple products. The s...

System DesignSystem Design FundamentalsData Ingestion & CDC
144
0
974 people solved
Feb 11, 2026
Stripe logo
Stripe
Medium
Software EngineerSenior+ Locked

Show Senior Engineering Leadership Through a Past Project

Explain senior engineering leadership through real project scope, technical judgment, coordination, delegation, and supported outcomes.

Behavioral & LeadershipLeadership & InfluenceProject Deep Dive
3
0
52 people solved
Sep 11, 2026
LinkedIn logo
LinkedIn
Hard
Software Engineer Locked

Shortest Word Distance Queries

Preprocess a fixed word sequence so repeated word-pair queries return their exact minimum index distance without rescanning the full input.

Coding & Algorithms
16
1
181 people solved
Sep 1, 2026
Snowflake logo
Snowflake
Hard
Software Engineer Locked

Design a Thread-Safe Multi-Rule Rate Limiter

Design a rate limiter that evolves from one rule to multiple concurrent rules, reversible permits, and deferred work. Make admission and ordering sema...

Software Engineering FundamentalsRate LimitingConcurrency
13
0
104 people solved
Jun 20, 2026
Intuit logo
Intuit
Medium
Software Engineer

Sum palindrome-change costs over all substrings

This is a three-part coding screen. Each part is independent — a string-algorithms problem, a SQL aggregation problem, and a shell-parsing problem — a...

Coding & AlgorithmsArrays & StringsSQL
33
0
385 people solved
Oct 13, 2025
Cubist logo
Cubist
Medium
Software Engineer

Rebuild a binary search tree from its postorder traversal in linear time

You are given the postorder traversal of a binary search tree (BST) whose values are all distinct. Rebuild the tree and return its preorder traversal....

Coding & AlgorithmsTrees
2
0
31 people solved
Aug 17, 2026
Robinhood logo
Robinhood
Medium
Software Engineer

Design a referral leaderboard with chain-based counts

Design and implement a function that generates a referral leaderboard for a platform, given two equal-length arrays rh_users and new_users representin...

Coding & AlgorithmsTrees
51
0
587 people solved
Aug 12, 2025
Google logo
GoogleMicrosoftAmazonBloomberg

Also asked at Amazon, Bloomberg

Hard
Software Engineer

Longest Equal-Character Run After Each Update

Problem You are given a lowercase string s and a sequence of updates. Update i replaces the character at zero-based index queryIndices[i] with queryCh...

Coding & AlgorithmsTreesData Structure Design
0
0
9 people solved
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Implement a Time-Based Key-Value Store

Implement a time-indexed key-value store that sets values at timestamps and retrieves the most recent value at or before a query timestamp.

Coding & Algorithms
2
0
28 people solved
Aug 14, 2026
Anthropic logo
Anthropic
Hard
Machine Learning Engineer

Design an inference routing and scheduling layer

System Design: Routing Layer for Heterogeneous Inference Backends (GPU/CPU) Context You are asked to design a routing layer that sits between a user-f...

ML System DesignLLM Inference & ServingCaching
64
0
606 people solved
Sep 6, 2025
Bridgewater logo
Bridgewater
Medium
Machine Learning Engineer Locked

Diagnose Strong Validation and Weak Production Performance

Diagnose why a model shows strong validation metrics but performs poorly in production by ranking and testing competing hypotheses. Examine leakage, s...

Machine Learning
14
0
104 people solved
Jul 8, 2026
Crusoe logo
Crusoe
Medium
Software EngineerSenior+

Print a binary tree as aligned text

Implement a function that prints (or returns) an ASCII layout of a binary tree. Requirements: - Each node has a string value (assume it contains no sp...

Coding & AlgorithmsTrees
34
0
427 people solved
Jan 1, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Explain AI Tool Use, Model Selection, and Engineering Validation

Explain practical AI use across coding and summaries, with honest contribution measures, task-specific model choices, validation, and cost awareness.

Behavioral & LeadershipAI-Assisted DevelopmentLLM Applications
8
0
65 people solved
Sep 5, 2026
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