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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
476
Companies
980
Updated
11.10.2026
476 Questions 980 Companies11.10.2026
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
Optiver logo
Optiver
Hard
Software Engineer

Design a satellite propagation simulator

Design a satellite propagation simulator Object-Oriented SatelliteNetwork: Message Propagation Simulator Design and implement an object-oriented Satel...

System DesignSimulation & State MachinesGraphs
72
0
561 people solved
Jul 16, 2025
Ixana logo
Ixana
Hard
Software Engineer

Schedule batched register operations optimally

Problem You are given a text file that describes batches of register operations (reads and writes) on integer-indexed registers. Your task is to sched...

Coding & AlgorithmsIntervals & SchedulingParsing & Interpreters
27
0
212 people solved
Nov 13, 2025
Scale AI logo
Scale AI
Medium
Software Engineer

Explain worker state machine load balancer design

You are designing a lightweight load balancer for a Python-based backend service that dispatches tasks to a pool of worker processes. Describe how you...

Software Engineering FundamentalsJob Scheduling & WorkflowsLow-Level Design (OOP)
30
0
319 people solved
Dec 8, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Find the Winner of a Connect Four Game from Its Move Sequence

Two players play Connect Four on a grid with rows rows and cols columns. They take turns dropping a piece into a column, and the piece falls to the lo...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
1
0
20 people solved
Apr 28, 2026
Meta logo
Meta
Easy
Machine Learning Engineer Locked

Solve four OA string/array/matrix/graph tasks

This multi-part prompt evaluates proficiency in core programming competencies: string parsing and character classification, simulation/greedy processi...

Coding & AlgorithmsArrays & StringsGrids & Matrices
13
0
106 people solved
Feb 12, 2026
Uber logo
Uber
Medium
Software Engineer

Perform matrix Candy Crush elimination

Question Implement a function that, given an m × n integer matrix representing colored blocks (same integers = same color), performs one round of "Can...

Coding & AlgorithmsSimulation & State MachinesTwo Pointers & Sliding Window
7
0
117 people solved
Aug 4, 2025
Circle logo
Circle
Medium
Software Engineer

Design payment scheduler with cancel and top-K outgoing

Design and implement an in-memory banking payment component with the following APIs: ( 1) schedulePayment(payerId, payeeId, amount, executeAt) -> paym...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
22
0
185 people solved
Aug 1, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Validate an extended tic-tac-toe state

Problem You are given a 3×3 tic-tac-toe board state as an array of 3 strings, each of length 3. Each cell is one of: - 'X' (player X) - 'O' (player O)...

Coding & AlgorithmsSimulation & State Machines
14
0
131 people solved
Dec 15, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Compute dasher pay from order event logs

You are given a list of delivery-order event records for a single dasher. Each record contains: - order_id - event_type in {CREATED, ACCEPTED, PICKED_...

Coding & AlgorithmsSimulation & State Machines
64
0
456 people solved
Jan 14, 2026
Garmin logo
Garmin
Medium
Software EngineerIntern

Value on the Secondary Diagonal of a Center-Out Clockwise Spiral Matrix

An n x n matrix with an odd n is filled with the integers 1 to n * n in a clockwise spiral that starts in the center cell and winds outward to the edg...

Coding & AlgorithmsGrids & Matrices
2
0
31 people solved
Apr 14, 2026
Uber logo
Uber
Medium
Software Engineer

Simulate one-round color elimination on a grid

Given an m x n integer matrix board where board[r][c] > 0 represents a color and 0 represents empty: ( 1) A nonzero cell at (r,c) explodes in this rou...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
16
0
110 people solved
Sep 6, 2025
Amazon logo
AmazonBloomberg
Medium
Software Engineer

Apply Special String Commands

Apply Special String Commands You are given a string s containing lowercase English letters and the commands *, #, and %. Start with empty working tex...

Coding & AlgorithmsArrays & StringsSimulation & State Machines
1
0
10 people solved
Google logo
Google
Hard
Software Engineer Locked

Determine winner in stack-merging game

This question evaluates understanding of combinatorial game theory, impartial game analysis, state-space encoding, and efficient state-space search te...

Coding & AlgorithmsSimulation & State MachinesBacktracking & Recursion
18
2
134 people solved
Jan 6, 2026
Waymo logo
Waymo
Medium
Software EngineerSenior+ Locked

Design a Ride Scheduler

This question evaluates object-oriented design, event-driven scheduling and simulation, state management for ordered task execution, API design, and h...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
33
0
251 people solved
Feb 6, 2026
OpenAI logo
OpenAI
Medium
Machine Learning Engineer Locked

Simulate Grid Infection

This question evaluates skills in multi-source breadth-first search, synchronous simulation updates, boundary handling, and off-by-one correctness wit...

Coding & AlgorithmsGrids & MatricesSimulation & State Machines
34
0
235 people solved
Mar 9, 2026
Upstart logo
Upstart
Medium
Data Scientist

Analyze HT vs HH stopping-time probabilities

Coin-Flip Stopping Game: HT vs HH You repeatedly flip a coin until either the pattern HT appears (Player A wins) or the pattern HH appears (Player B w...

Statistics & MathProbabilitySimulation & State Machines
10
0
188 people solved
Oct 13, 2025
Salesforce logo
Salesforce
Medium
Software Engineer Locked

Design a scalable coffee ordering notification system

This question evaluates a candidate's ability to design scalable, real-time distributed systems with emphasis on order lifecycle management, reliable ...

System DesignSystem Design FundamentalsMessaging & Event-Driven
10
0
163 people solved
Feb 12, 2026
Additive Ai logo
Additive Ai
Medium
Software Engineer Locked

Advance Game of Life with Reduced Auxiliary Storage

Advance Game of Life by one generation while preserving simultaneous updates, handling grid boundaries, and reducing storage in an in-place implementa...

Coding & AlgorithmsSimulation & State Machines
4
0
35 people solved
Aug 24, 2026
Instacart logo
Instacart
Medium
Software Engineer

Compute delivery wait times

You're building a last‑mile delivery simulator. Given n orders, each with arrival_time (non-decreasing integers) and service_time (positive integers),...

Coding & AlgorithmsHeaps & Priority QueuesSimulation & State Machines
8
0
134 people solved
Sep 6, 2025
Shopify logo
Shopify
Medium
Machine Learning Engineer

Design and implement a word-guessing game

Word-Guessing Game (Wordle-like) — Design and Implement Context Build a small, standalone command-line application that lets a user guess a secret wor...

System DesignSimulation & State MachinesArrays & Strings
73
0
492 people solved
Aug 12, 2025
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