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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
ByteDance logo
ByteDance
Medium
Data Scientist

Daily Active Users per App Excluding US Activity and Fraudulent Users

A company that runs several video apps wants today's daily active users (DAU) for each of its apps, excluding activity in the United States and counti...

Data Manipulation (SQL/Python)SQL
0
0
4 people solved
Aug 24, 2026
Glean logo
Glean
Medium
Software Engineer Locked

Return Top Department Suggestions

This question evaluates proficiency in prefix-based search and top-k ranking, familiarity with in-memory data structures and preprocessing strategies,...

Coding & Algorithms
16
0
103 people solved
May 17, 2026
Roblox logo
Roblox
Hard
Software Engineer

Design a scheduled payment system

System Design: Scheduled Payment Service Context You are designing a backend service that allows end users to: - Schedule a payment for a future date/...

System DesignPayments & LedgersDistributed Transactions & Idempotency
36
0
512 people solved
Sep 6, 2025
Apple logo
Apple
Medium
Software Engineer Locked

Count Islands in a Binary Grid

Count four-directionally connected islands in a potentially large binary grid without changing the caller's input. The problem emphasizes complete gra...

Coding & AlgorithmsGrids & Matrices
20
0
255 people solved
Aug 25, 2026
eBay logo
eBay
Medium
Software Engineer Locked

Find the Longest Palindromic Substring

Return the longest contiguous palindromic substring efficiently, choosing the earliest starting candidate when multiple maximum-length answers exist a...

Coding & Algorithms
8
0
68 people solved
Aug 26, 2026
Netflix logo
Netflix
Medium
Software Engineer

Implement TTL Cache and Tree Balance Reporting

Complete both coding tasks. Task A: Time-limited cache Design and implement an in-memory cache where every key expires after a time-to-live duration. ...

Coding & Algorithms
11
0
78 people solved
Apr 17, 2026
Reddit logo
Reddit
Medium
Software EngineerSenior+ Locked

Defend a Schema Decision Through a Real Technical Challenge

Prepare a technically grounded story about a schema choice that affected correctness, scale, or delivery speed. Explain workload invariants, the stron...

Behavioral & Leadership
7
0
86 people solved
Jul 8, 2026
Atlassian logo
Atlassian
Medium
Software Engineer

Design a tagging system and REST APIs

Design a tagging system (similar to tagging pages/issues) with a strong focus on REST API design. Functional requirements: - Create a tag. - Rename a ...

System DesignAPI DesignSystem Design Fundamentals
21
1
181 people solved
Jan 5, 2026
Waymo logo
Waymo
Medium
Software Engineer Locked

Validate a Parent-Child Forest

This question evaluates understanding of graph theory concepts—specifically rooted trees, parent-child relationships, cycle detection, and node in-deg...

Coding & Algorithms
10
0
79 people solved
May 27, 2026
Virtu Financial logo
Virtu Financial
Hard
Quantitative Researcher Locked

Approximate a Rare-Event Binomial Probability

Approximate a rare binomial upper tail with a Poisson distribution. Derive lambda, use the complement through five events, and explain when the approx...

Statistics & Math
3
0
38 people solved
Aug 21, 2026
Meta logo
Meta
Medium
Product Manager

Product Sense: How Meta Could Support Students Working Through School Assignments

You are a product manager at Meta, whose apps include Facebook, Instagram, WhatsApp and Messenger. Design a product that helps students with their hom...

Product Design & StrategyProduct SenseMetrics & KPIs
0
0
10 people solved
Sep 12, 2026
Google logo
GoogleMicrosoftAmazon

Also asked at Amazon, Meta, Bloomberg

Medium
Software Engineer

Reachability Queries in a Value-Difference Graph

Reachability Queries in a Value-Difference Graph There are n graph nodes labeled 0 through n - 1. You are given their integer values in an array nums,...

Coding & AlgorithmsGraphs
0
0
8 people solved
DRW logo
DRW
Medium
Software EngineerIntern

Solve three algorithmic OA problems

This is an online assessment (Codility-style, 150 minutes) consisting of three independent coding problems. Solve each one separately; they do not sha...

Coding & AlgorithmsBacktracking & RecursionBit Manipulation
57
0
475 people solved
Oct 8, 2025
Shopify logo
Shopify
Medium
Machine Learning Engineer

Model Product Ranking

You are building a machine learning model for product ranking in an e-commerce marketplace. Given a user, context, and a set of candidate products, ra...

Machine LearningRanking ModelsML System Design
10
0
179 people solved
Apr 1, 2026
Meta logo
Meta
Medium
Software Engineer AI Locked

Solve a Key-Door Corridor Maze

This question evaluates graph search and state-space reasoning by requiring shortest-path computation in a constrained one-dimensional maze with colle...

Coding & AlgorithmsGraphs
4
0
78 people solved
May 14, 2026
Capital One logo
Capital One
Medium
Data ScientistSenior+ Locked

Explain an ML Project from Model Development Through Deployment

Prepare a data science project walkthrough that connects the prediction target and validation design to an operational decision. Explain model selecti...

ML System Design
11
0
93 people solved
May 31, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design an AI playground editor

This question evaluates full-stack system design competencies including real-time response streaming, rich-text editor data modeling, backend APIs, pe...

System DesignSystem Design FundamentalsLLM Applications
32
0
357 people solved
Apr 2, 2026
Reddit logo
Reddit
Medium
Machine Learning Engineer Locked

Analyze CTR Data and Train Model

This question evaluates end-to-end supervised machine learning competencies for tabular click-through rate prediction, including exploratory data anal...

Machine LearningSupervised LearningCTR Prediction & Ads ML
13
0
168 people solved
Feb 1, 2026
Squarepoint logo
Squarepoint
Medium
Risk Technology Software EngineerSenior+ Locked

Concatenate Two C++ Index Sequences at Compile Time

Create a compile-time C++ utility that concatenates two index-sequence packs unchanged through variadic-template specialization, a convenient alias, a...

Software Engineering Fundamentals
2
0
34 people solved
Aug 16, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Meta, Microsoft, TCS, Goldman Sachs, NVIDIA

Easy
Software Engineer

Return the Third Distinct Maximum or the Maximum

Return the Third Distinct Maximum or the Maximum Given an integer array nums, return its third-largest distinct value. If the array has fewer than thr...

Coding & AlgorithmsArrays & Strings
0
0
10 people solved
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