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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Hudson logo
Hudson
Medium
Software EngineerIntern

Design a Fixed-Size Memory Allocator with Correct Alignment

Design a fixed-size memory allocator backed by slabs and a linked free list. Explain allocation, deallocation, alignment, lifetime, corruption defense...

Software Engineering Fundamentals
1
0
18 people solved
May 5, 2025
Amazon logo
Amazon
Medium
Software Engineer

Compute tree diameter

Given a (potentially large) binary tree, compute its diameter (the number of edges on the longest path between any two nodes). Implement an O(n) solut...

Coding & Algorithms
5
0
59 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Design A Scalable Web Crawler

Design a scalable web crawler that discovers, fetches, parses, and stores web pages for downstream use such as search indexing or content analysis. Yo...

System DesignSystem Design FundamentalsJob Scheduling & Workflows
12
0
107 people solved
Apr 18, 2026
Spokeo logo
Spokeo
Medium
Data Scientist

Solve Logic Puzzles: Algorithms and Proofs Required

Solve Logic Puzzles: Algorithms and Proofs Required Scenario On-site logic/algorithm quiz with hiring manager and VP Question Solve six AMC-8–level ma...

Coding & Algorithms
7
0
53 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Scientist

Convince PM to Implement Duplicate Observation Tool

Convince PM to Implement Duplicate Observation Tool Scenario Meta is considering building a Duplicate Observation Tool (DOT) to detect malicious copy‑...

Analytics & Experimentation
7
0
49 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Data Scientist

Evaluate ETA Impact on Conversion

You are a Senior Data Scientist at a ride-hailing company such as Uber. ETA refers to the estimated pickup time shown to a rider before they decide wh...

Analytics & ExperimentationExperiment Design (A/B Testing)
19
0
186 people solved
Feb 14, 2026
TikTok logo
TikTok
Hard
Software Engineer

Design a global notification service

Design a global notification service System Design: Globally Distributed Notification Service Context You are designing a multi-tenant notification pl...

System DesignSystem Design FundamentalsFault Tolerance & Failover
12
0
91 people solved
Jul 17, 2025
Meta logo
Meta
Medium
Data Scientist

Evaluate new-product notification feature

A marketplace team is considering building a feature that notifies buyers when new products relevant to their interests are listed. How would you dete...

Analytics & Experimentation
5
0
41 people solved
Jan 5, 2026
Reuters logo
Reuters
Easy
Software EngineerIntern

Design a web search engine pipeline

Design the high-level pipeline of a web search engine. Assume you need to support internet-scale search (billions of web pages) with low-latency queri...

System Design
3
0
42 people solved
Nov 14, 2025
Medium
Backend Engineer

Compare Strings With Deletions

You are given two strings s and t. Each string may contain lowercase letters and the special character #. A # deletes the closest non-deleted characte...

Coding & Algorithms
2
0
39 people solved
Jan 23, 2026
Meta logo
Meta
Medium
Software Engineer

Find Any Local Minimum with Iterative Binary Search

Find Any Local Minimum with Iterative Binary Search Given a nonempty integer array numbers, return the index of any local minimum. An index i is a loc...

Coding & Algorithms
1
0
21 people solved
Mar 2, 2026
TikTok logo
TikTok
Medium
Data Scientist

Balance Customer Satisfaction with Fraud Prevention: Key Metrics to Track

Balancing Customer Satisfaction and Fraud Prevention In a consumer app with payments, Product wants minimal friction for legitimate users while Risk w...

Analytics & Experimentation
27
0
98 people solved
Jul 12, 2025
Asana logo
Asana
Medium
Software Engineer

Compute Products Excluding Each Index

You are given an integer array nums of length n. Return an array answer such that answer[i] equals the product of every element of nums except nums[i]...

Coding & Algorithms
5
0
40 people solved
Apr 2, 2026
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Compare convolutions and transformers

Compare CNNs and Transformers Task Explain the key differences between convolutional neural networks (CNNs) and transformer architectures. Specificall...

Machine LearningTransformers & AttentionNeural Networks & Training
15
0
161 people solved
Aug 13, 2025
Amazon logo
Amazon
Hard
Data Scientist

Quantify build-vs-buy training decision

Quantitative Decision Framework for Selecting a New Employee Training Program Context Your company must choose one of three ways to launch a new emplo...

Analytics & Experimentation
3
0
48 people solved
Oct 13, 2025
HubSpot logo
HubSpot
Hard
Software Engineer

Design a weather aggregation system

Design a weather aggregation system System Design: Weather Data Aggregation (10-minute Updates) Context Build a service that periodically fetches weat...

System DesignSystem Design FundamentalsAPI Integration & HTTP Clients
9
0
128 people solved
Jul 31, 2025
Uber logo
Uber
Medium
Software EngineerSenior+

Solve stock profit and vertical tree traversal

You have a 60-minute coding interview with two algorithm questions: 1) Max profit from one stock trade - Input: an integer array prices, where prices[...

Coding & AlgorithmsArrays & StringsTrees
15
0
156 people solved
Feb 9, 2026
TikTok logo
TikTok
Medium
Data Scientist

Compute Averages of Unique Numbers in Dictionary Lists

Scenario Python tech screen: given a dictionary mapping keys to numeric lists, e.g., {'a':[1,2,1],'b':[1,2,3]}, compute the average of each list after...

Coding & Algorithms
27
0
74 people solved
Jul 12, 2025
Pinduoduo logo
Pinduoduo
Hard
Software Engineer Locked

Find Shortest Square-Sum Path

This question evaluates algorithmic problem-solving skills with number-theoretic reasoning about perfect squares and the ability to reconstruct a mini...

Coding & Algorithms
0
0
11 people solved
May 16, 2026
Capital One logo
Capital One
Medium
Data Scientist Locked

Compute probability second largest is below 2/3

This question evaluates understanding of order statistics, uniform probability distributions, and probabilistic reasoning, specifically the ability to...

Statistics & Math
3
0
45 people solved
Oct 13, 2025
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