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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
IBM logo
IBM
Medium
Software Engineer Locked

Count Replacements Needed to Separate Equal Adjacent Characters

Count the minimum replacements needed to eliminate equal adjacent characters across many lowercase words by reducing each maximal repeated run without...

Coding & Algorithms
8
0
77 people solved
Jun 16, 2026
Hadrian logo
Hadrian
Hard
Software Engineer Locked

Design a Rule-Driven Process Graph Validator

Design a directed process-graph validator around explicitly supplied ordering and presence rules without treating preserved examples as the complete c...

Software Engineering Fundamentals
2
0
28 people solved
May 17, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Highest Total Value from At Most k Non-Overlapping Meetings

Each meeting has a start day, an end day and a value. You may attend at most k meetings, you must attend each chosen meeting from its start day throug...

Coding & AlgorithmsDynamic ProgrammingIntervals & Scheduling
1
0
22 people solved
Apr 28, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Turn an Unlikely Project Around and Recover When AI Coding Falls Short

Prepare two senior engineering stories: turning an apparently infeasible project into a credible result, and recovering when an AI coding tool produce...

Behavioral & LeadershipAI-Assisted DevelopmentOwnership & Execution
4
0
32 people solved
May 29, 2026
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Design an O(1) eviction cache

Implement an in-memory key–value cache with fixed capacity that evicts the least recently used entry when full. Support get(key) -> value or -1 if mis...

Coding & Algorithms
4
0
72 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Data Scientist

Solve two-pointer, sliding-window, and string tasks

Solve the following three coding tasks: 1) Two-pointer in-place de-duplication: Given a non-decreasing integer array nums and an integer k >= 1, modif...

Coding & Algorithms
23
0
173 people solved
Oct 13, 2025
Discord logo
Discord
Medium
Software Engineer

Implement an asyncio-based chat server

Async Chat Server (Python asyncio) Build a TCP chat server using Python's asyncio. The server listens on a given port and serves many concurrent clien...

Coding & AlgorithmsConcurrency
74
0
496 people solved
Oct 25, 2025
Morgan Stanley logo
Morgan Stanley
Medium
Data Scientist Locked

Explain Your Job Search and Interest in a Risk Data Role

Build a concise answer for why you are changing jobs and why a Morgan Stanley risk data role fits your next step. The guide shows how to use verified ...

Behavioral & Leadership
1
0
24 people solved
Jul 10, 2026
Google logo
Google
Medium
Data Scientist

Compute violation rate and flag precision in SQL

You are analyzing a Trust & Safety product in BigQuery. Assume 'today' is 2025-09-01 (UTC). Define precise metrics and write SQL to compute them, bein...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
18
1
157 people solved
Oct 13, 2025
xAI logo
xAI
Medium
Software Engineer

Explain ACID and transactions

ACID Transactions: Definitions, Enforcement, Isolation Levels, and Example Context You are designing a service backed by a relational database that su...

System DesignTransactions & IsolationDatabase Internals
16
0
220 people solved
Aug 12, 2025
Airbnb logo
Airbnb
Medium
Data Scientist

Build panel in SQL; run causal regression

Assume today is 2025-09-01 (UTC). Schema and small samples: users(user_id INT, country STRING, signup_date DATE, platform STRING) Sample: user_id | co...

Data Manipulation (SQL/Python)Causal InferenceSQL
8
0
153 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Fewest Moves to Collect Every Key in a Grid With Locked Cells

You are given a rectangular grid as a list of equal-length strings. Each character is one of: - '@': the starting cell (there is exactly one); apart f...

Coding & AlgorithmsGraphsGrids & Matrices
1
0
14 people solved
Jun 16, 2026
Amazon logo
AmazonMetaGEP
Easy
Software Engineer

Letters Appearing in Both Cases

Letters Appearing in Both Cases Given a string word, call an English letter special when both its lowercase form and its uppercase form occur somewher...

Coding & AlgorithmsArrays & Strings
0
0
7 people solved
Aeonea logo
Aeonea
Medium
Software Engineer

Implement a tennis score tracker

Design and implement a tennis game scoring function. Input: a stream of points won by players 'A' or 'B' (e.g., A, B, B, B, B). After each point, outp...

Coding & Algorithms
8
0
98 people solved
Sep 6, 2025
Anthropic logo
Anthropic
Medium
Machine Learning Engineer Locked

Explain multithreading vs multiprocessing

This question evaluates understanding of concurrency and parallelism, specifically multithreading versus multiprocessing, their interaction with multi...

Software Engineering FundamentalsConcurrencyOperating Systems
60
0
447 people solved
Feb 11, 2026
Omnissa logo
Omnissa
Medium
Software Engineer Locked

Find the Maximum Sum of a Contiguous Subarray

Compute the maximum sum of any nonempty contiguous subarray, including all-negative inputs and large 64-bit totals. The exercise calls for a linear sc...

Coding & Algorithms
2
0
28 people solved
Sep 4, 2026
Epic Systems logo
Epic Systems
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
3
0
26 people solved
Aug 30, 2026
Shopify logo
Shopify
Medium
Data ScientistSenior+ AI Locked

Analyze Pirated Theme Usage

This question evaluates competency in temporal data manipulation, interval-overlap logic, aggregations and joins to calculate monthly usage metrics an...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
16
2
169 people solved
May 23, 2026
Airbnb logo
Airbnb
Medium
Data Scientist

Analyze A/B Test Results to Inform Stakeholder Decisions

Analyze A/B Test Results to Inform Stakeholder Decisions You receive raw log-level event data from an A/B test on a consumer booking funnel. You must ...

Analytics & ExperimentationExperiment Analysis & ReadoutData Cleaning & Wrangling
37
0
243 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Software Engineer

Design a ticket or hotel reservation system

Design a reservation system (Ticketmaster-style event seats or hotel rooms). Requirements: - Users search availability by date/event. - Users select s...

System Design
3
0
65 people solved
Feb 25, 2026
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