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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Vanta logo
Vanta
Medium
Software Engineer Locked

Describe Something New You Learned Recently

Describe a meaningful skill learned within the last six months, including the motivation, deliberate practice, feedback loop, and an early misconcepti...

Behavioral & Leadership
10
0
78 people solved
Jul 13, 2026
Google logo
Google
Medium
Software Engineer Locked

Solve Shortest Paths and Rental Allocation

This question evaluates understanding of shortest-path algorithms and reachability in weighted graphs (including directed vs. undirected handling and ...

Coding & Algorithms
12
0
96 people solved
Apr 12, 2026
Epic logo
Epic
Medium
Software Engineer Locked

Solve Coin, Growth, Time, and Rate Problems

Work through coin, daily growth, clock, pizza, and corridor puzzles with explicit assumptions, dimensional reasoning, and checks of each calculated an...

Statistics & MathMath & Number TheoryPuzzles & Brainteasers
2
0
17 people solved
Aug 30, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Design an API for pay computation with retries

You’ve implemented logic that computes a dasher’s pay from order event logs (events include timestamps and state transitions). Design an HTTP API to e...

Software Engineering FundamentalsAPI DesignDistributed Transactions & Idempotency
15
1
262 people solved
Jan 14, 2026
Imc logo
Imc
Medium
Software Engineer Locked

Answer conceptual true/false and caching questions

This question evaluates understanding of integer representation, caching eviction policies and trade-offs (LFU vs LRU) including communication of anal...

Software Engineering FundamentalsCachingBinary Search
34
0
404 people solved
Jan 20, 2026
ByteDance logo
ByteDance
Medium
Software Engineer Locked

Reverse a Singly Linked List

This question evaluates a candidate's grasp of linked list pointer manipulation and in-place data structure transformation. It tests the ability to re...

Coding & Algorithms
4
0
31 people solved
Jun 18, 2026
Whatnot logo
Whatnot
Medium
Software Engineer

Build a Tic-Tac-Toe App

Implement a simple Tic-Tac-Toe mobile app that can be completed in a 45-minute coding interview. Requirements: - Display a 3x3 board. - Support two lo...

Coding & Algorithms
4
0
77 people solved
Jan 24, 2026
Citadel logo
Citadel
Medium
Software Engineer Locked

Return nodes on a tree diameter path

This question evaluates understanding of graph algorithms and tree properties, specifically the ability to identify and reconstruct a longest simple p...

Coding & AlgorithmsTrees
15
0
132 people solved
Jan 9, 2026
Capital One logo
Capital One
Medium
Data Engineer

Write SQL using joins and window functions

SQL Coding: Rank within Groups with Joins You are given two tables: accounts - account_id (string) - customer_id (string) - segment (string) — e.g., "...

Coding & AlgorithmsSQL
36
1
247 people solved
Mar 1, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Design an Online Tic-Tac-Toe Service with REST-Only APIs, Matchmaking and Multi-Region

Design an online Tic-Tac-Toe game. Two players are paired through online matchmaking and then play a game against each other, each from their own devi...

System DesignSystem Design FundamentalsAPI Design
0
0
7 people solved
Aug 4, 2026
DRW logo
DRW
Easy
Data EngineerIntern Locked

Implement Nested Transactions in an In-Memory Database

Simulate an in-memory key-value database with nested transactions, visible layered reads, permanent-storage counts, rollback of the deepest transactio...

Coding & Algorithms
7
0
121 people solved
May 22, 2026
DoorDash logo
DoorDash
Hard
Software Engineer

Calculate Daily Driver Pay

You are given a one-day event log for a delivery driver. Each input record is a JSON event with fields such as order_id, event_type, timestamp, and ba...

Coding & AlgorithmsIntervals & SchedulingSimulation & State Machines
23
0
258 people solved
Feb 6, 2026
Tesla logo
Tesla
Hard
Software Engineer Locked

Implement a Rollback Key-Value Store

This question evaluates competency in designing data structures and state-management mechanisms, focusing on rollback/undo semantics, versioning, and ...

Coding & Algorithms
3
0
68 people solved
Apr 9, 2026
J.P. Morgan logo
J.P. Morgan
Medium
Quantitative Researcher

Explain Daily Signal Construction and a Prediction Workflow

Walk through a quantitative project in which you constructed a daily signal and used it to produce predictions. Explain the workflow, your role, and h...

Machine LearningProject Deep DiveFeature Engineering
1
0
17 people solved
Mar 18, 2026
Netflix logo
Netflix
Medium
Data Scientist

Write SQL for rolling frequency caps

You work on ad serving with per-user rolling 7-day frequency caps at the campaign level. Assume "today" is 2025-09-01 and t0 = 2025-09-01 12:00:00 UTC...

Data Manipulation (SQL/Python)
6
0
80 people solved
Oct 13, 2025
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Design an AWS fine-tuning platform for LLMs

Scenario You need to build a system that lets customers fine-tune their own large language model (LLM) on AWS. Task Design a managed platform where us...

ML System DesignFine-Tuning & Alignment TechniquesMLOps & Model Serving
23
0
185 people solved
Dec 15, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Calculate Courier Earnings

Design a function to calculate total courier pay from a set of delivery orders. Assume time is represented as integer minutes, and intervals are half-...

Coding & AlgorithmsIntervals & SchedulingSorting
19
0
139 people solved
Jan 9, 2026
Waymo logo
Waymo
Easy
Data Scientist

How compare Waymo turning trajectories statistically

Problem You have aerial-drone data that records the 2D turning trajectories of vehicles passing through multiple intersections. Each trajectory corres...

Statistics & MathHypothesis TestingCausal Inference
91
0
631 people solved
Feb 7, 2026
xAI logo
xAI
Medium
Data Engineer Locked

Build a One-Pass Data Cleaning Pipeline

This question evaluates a candidate's competence in large-scale data engineering and system design, covering memory-bounded streaming IO, explainable ...

System DesignData Cleaning & WranglingETL & Data Pipelines
42
0
343 people solved
May 30, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Design an n x n Tic-Tac-Toe Game

This question evaluates a candidate's ability to design a class-based data structure that tracks game state and efficiently detects a win condition af...

Coding & Algorithms
10
0
84 people solved
Jun 23, 2026
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