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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
Uber logo
Uber
Medium
Software Engineer Locked

Find the Cheapest Valid Round Trip

Find the cheapest outbound and return fares subject to a minimum stay between the travel days. Use suffix minima to evaluate every valid departure in ...

Coding & Algorithms
10
0
94 people solved
Aug 16, 2026
Salesforce logo
Salesforce
Medium
Software Engineer Locked

Count the Ways to Split a Digit String into Primes

This question evaluates dynamic programming combined with number theory, specifically counting valid partitions of a digit string under a primality co...

Coding & Algorithms
6
0
44 people solved
Jun 30, 2026
Optiver logo
Optiver
Medium
Software EngineerIntern

Implement a News Publishing System with Topic Subscriptions and Delivery Limits

You are building the core delivery engine for a news publishing service. The service continuously receives news items, stores them, and — whenever a p...

Coding & AlgorithmsData Structure DesignStacks & Queues
12
2
180 people solved
Nov 25, 2025
ByteDance logo
ByteDance
Medium
Software EngineerIntern

Count Numbers with an Even Number of Digits

Problem Given an array of positive integers, count how many elements have an even number of decimal digits. Function Contract Implement count_even_dig...

Coding & Algorithms
2
0
22 people solved
Apr 20, 2026
C3 AI logo
C3 AI
Hard
Data Scientist Locked

Compare Transformers and RNNs and Derive Attention Complexity

Compare Transformers and RNNs while deriving dense self-attention complexity. Separate projection and score costs, training parallelism, generation ca...

Machine Learning
3
0
27 people solved
Aug 21, 2026
Stripe logo
Stripe
Medium
Software Engineer Locked

Validate KYC CSV Records

This question evaluates skills in CSV parsing, string normalization, field-level validation, and rule-based text matching, emphasizing attention to ed...

Coding & Algorithms
8
0
166 people solved
Jan 31, 2026
eBay logo
eBay
Medium
Software Engineer Locked

Describe Your Most Technically Difficult Project

Present your most technically difficult project through its decisive constraint, competing approaches, individual ownership, validation and rollout ev...

Behavioral & Leadership
1
0
13 people solved
Aug 26, 2026
Meta logo
Meta
Hard
Machine Learning EngineerSenior+ AI Locked

Build a Friend Recommender

This question evaluates proficiency in graph algorithms, recommendation system logic, input validation, metric design, and test-driven software implem...

Coding & Algorithms
6
0
77 people solved
Mar 1, 2026
Spotify logo
Spotify
Easy
Machine Learning Engineer Locked

Query Top Played Tracks Globally And By Country

Practice SQL for music playback analytics by finding top tracks globally and top tracks per country from event logs. The prompt targets aggregation, w...

Data Manipulation (SQL/Python)SQL
10
7
181 people solved
Jul 2, 2026
Booking.com logo
Booking.com
Medium
Software Engineer

Match Bookings to Payments

You are given two unsorted lists: - bookings: each record contains at least a unique booking_id - payments: each record contains at least a booking_id...

Coding & AlgorithmsArrays & Strings
11
0
116 people solved
Mar 15, 2026
Mistral AI logo
Mistral AI
Medium
Machine Learning Engineer Locked

Answer an LLM Systems Quick-Fire Interview

This Mistral AI interview question covers a fast-moving set of LLM systems topics, from inference behavior to practical deployment trade-offs. It help...

Machine LearningTransformers & AttentionFine-Tuning & Alignment Techniques
30
0
238 people solved
Jul 2, 2026
Zoox logo
Zoox
Medium
Software Engineer Locked

Explain C++ References, Pointers, Virtual Methods, and Overrides

Prepare for a Zoox software engineering interview question about explain c++ references, pointers, virtual methods, and overrides. The prompt highligh...

Software Engineering Fundamentals
10
0
74 people solved
May 7, 2026
Applied Intuition logo
Applied Intuition
Easy
Software Engineer

Find intersection of two line segments

Problem Given two 2D line segments AB and CD, determine whether they intersect. Each segment is defined by its endpoints: - A(x1, y1), B(x2, y2) - C(x...

Coding & Algorithms
6
0
91 people solved
Feb 12, 2026
Grammarly logo
Grammarly
Easy
Software Engineer

Implement string reduction and time map

In a coding interview, you are asked to solve two algorithm problems. 1. String reduction with adjacent duplicates - Basic version: Given a string ...

Coding & AlgorithmsStacks & QueuesData Structure Design
19
1
162 people solved
Nov 29, 2025
Airbnb logo
Airbnb
Medium
Software Engineer

Implement Connect Four with win detection

Implement a Connect Four game engine. Support a general m×n board (default 6× 7) and a win condition of k in a row (default 4). Provide an API: Connec...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
29
0
192 people solved
Jul 31, 2025
Gimlet Labs logo
Gimlet Labs
Medium
Member of Technical Staff, ML Systems

Design an Offline Inference Platform with Hardware-Aware Routing

Interview Prompt Design an offline large-model inference platform that can place different phases of work on different hardware pools, including older...

ML System Design
4
0
58 people solved
Apr 15, 2026
DoorDash logo
DoorDash
Medium
Data ScientistSenior+ Locked

Diagnose a One-Day Drop in Successful Deliveries

Investigate an absolute one-day drop in successful deliveries without mistaking a count change for a rate change. Build a funnel decomposition, rank c...

Analytics & ExperimentationMetric DiagnosticsUser Behavior & Funnels
16
1
233 people solved
Jul 1, 2026
Netapp logo
Netapp
Medium
Software Engineer Locked

Design an Ordering Service That Prevents the Last Item from Being Oversold

Design food-ordering coordination that reserves exact inventory, takes payment, and starts downstream work without overselling the last unit under con...

System Design
1
0
13 people solved
Aug 9, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Design a Threshold-Based Database Partition Rebalancer

Design a threshold-based database partition rebalancer that splits oversized key ranges and safely merges eligible adjacent ranges. The exercise cover...

Software Engineering FundamentalsStorage & ShardingDistributed Transactions & Idempotency
10
0
73 people solved
Jul 23, 2026
Harvey logo
Harvey
Hard
Software Engineer

Determine identical files ignoring metadata

Question How would you determine whether two files contain identical bytes while ignoring all filesystem metadata? Propose and justify a hashing-based...

System DesignFile & Media StorageCryptography
96
0
671 people solved
Sep 6, 2025
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