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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Zoox logo
Zoox
Medium
Data Scientist

Compute posterior for biased coin after 3H1T

You are given a coin known to be biased: one face lands with probability 2/3 and the other with probability 1/3, but you do not know whether Heads is ...

Statistics & MathBayesian Statistics
20
0
395 people solved
Oct 13, 2025
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a social network with snapshots

This question evaluates understanding of data structures, graph representations, immutability and snapshot/versioning strategies for in-memory systems...

Software Engineering FundamentalsData Structure DesignGraphs
41
0
350 people solved
Nov 16, 2025
Pinduoduo logo
Pinduoduo
Medium
Software Engineer Locked

Trace Java Static and Instance Field Initialization

Consider a Java class with static fields a and c, an instance field b, and this initialization: c = 2; the constructor executes a++, b++, and c++. Mak...

Software Engineering Fundamentals
2
0
27 people solved
Jul 27, 2026
Capital One logo
Capital One
Medium
Product Manager

Describe a Product You Led

Tell me about a technical product or feature you led end-to-end. Walk through the situation using STAR, explain the major tradeoffs you evaluated, wha...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
8
0
125 people solved
Jun 12, 2025
Plaid logo
Plaid
Medium
Software Engineer

Explain project scope, timeline, and delegation

10–15 Minute Project Deep Dive (Behavioral and Leadership in a Technical Screen) Context You are asked to present a concise, slide-driven deep dive on...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
22
1
306 people solved
Sep 6, 2025
Snapchat logo
Snapchat
Medium
Software Engineer

Stream Records into Clusters and Track Each Cluster's Maximum and Median

A service consumes a stream of data records and processes them one at a time. Every record is stored in exactly one cluster, and the record itself det...

Software Engineering FundamentalsData Structure DesignConcurrency
1
0
8 people solved
Jul 1, 2026
Zoox logo
Zoox
Medium
Data Engineer

Write SQL revenue and anomaly queries

You are given two tables. Table: transactions | Column | Type | Description | |---|---|---| | transaction_id | int | Unique identifier for each transa...

Coding & AlgorithmsSQLData Quality & Validation
6
0
97 people solved
Apr 4, 2026
Google logo
Google
Medium
Machine Learning Engineer Locked

Implement substring search and weighted sampling

This question evaluates algorithm design and analysis skills across string processing (efficient substring search) and randomized/data-structure techn...

Coding & AlgorithmsString AlgorithmsMath & Number Theory
20
0
182 people solved
Mar 30, 2026
DoorDash logo
DoorDash
Medium
Machine Learning Engineer

How would you target promotions to grow consumers?

ML / Growth Scenario You own a system that sends promotion offers (e.g., "$10 off", "free delivery") to consumers to increase growth. Prompt Design an...

Machine LearningPersonalizationCausal Inference
18
0
174 people solved
Oct 17, 2025
Jane Street logo
Jane Street
Easy
Quantitative TraderIntern

Four Fair Coins: Expected Payoff and Pricing Two Magic Wands

You play the following game: four fair coins are tossed at the same time. For every coin that lands heads, you are paid \$1. The interviewer walks you...

Machine LearningProbabilityPuzzles & Brainteasers
11
1
131 people solved
Sep 11, 2025
Home Depot logo
Home Depot
Easy
Product Analyst

Decide whether to keep a negative-margin promotion

A retail team is running a Mulch promotion. The promotion currently has a negative unit margin (i.e., discounted price is below unit cost), so on the ...

Analytics & Experimentation
4
0
52 people solved
Feb 14, 2026
Uber logo
Uber
Medium
Software EngineerIntern Locked

Last Truck to Leave a One-Dimensional Lane

This algorithms interview question evaluates reasoning about continuous motion, collisions, and exact rational time in a one-dimensional simulation. I...

Coding & AlgorithmsMath & Number Theory
27
0
480 people solved
Jul 3, 2026
Stripe logo
Stripe
Medium
Software Engineer

Build searchable list and highlight max transaction

UI Component: Filtered List With Max-Highlight Context Implement a small web UI component (e.g., in a modern frontend framework) that receives an arra...

Software Engineering FundamentalsUI Components & AccessibilityReact & UI Frameworks
16
0
150 people solved
Sep 6, 2025
Read.Ai logo
Read.Ai
Medium
Software Engineer

Implement a per-user API rate limiter

You are building an API gateway that must enforce per-user rate limits. Task Implement a rate limiter with the following API: - RateLimiter(int maxReq...

Coding & AlgorithmsRate Limiting
13
0
113 people solved
Nov 3, 2025
Spotify logo
Spotify
Medium
Machine Learning Engineer Locked

Design a Sequential Personalized Playlist Recommender

Design a real-time ML system that selects and orders a personalized 10-track playlist from 10,000 candidates. Cover sequence-aware reranking, behavior...

ML System Design
9
0
65 people solved
Aug 14, 2026
Amazon logo
Amazon
Medium
Software Engineer

Overcoming Major Obstacles to Reach an Important Goal

In a round that combined a behavioral question with a coding exercise, the interviewer opened with: > Tell me about a time you had to overcome signifi...

Behavioral & LeadershipOwnership & Execution
0
0
3 people solved
Aug 29, 2026
Amazon logo
Amazon
Medium
Business Intelligence Engineer

Find Top Three Books by City in Recent Months

BOOK_SALES +------+--------+------------+------------+ | city | asin | sale_date | units_sold | +------+--------+------------+------------+ | NYC ...

Data Manipulation (SQL/Python)
7
0
61 people solved
Jul 12, 2025
Point72 logo
Point72
Hard
Data Engineer

Implement Portfolio Trading Optimizer

You are given an array prices, where prices[i] is the price of one stock on day i. You may perform multiple buy/sell transactions over the period, but...

Coding & Algorithms
4
0
62 people solved
Apr 30, 2026
Home Depot logo
Home Depot
Easy
Product Analyst

Debug SQL join that drops rows

You’re analyzing Home Improvement retail transactions to understand sales of Mulch during promotions. After joining multiple tables, your final result...

Data Manipulation (SQL/Python)
7
0
61 people solved
Feb 14, 2026
Google logo
Google
Hard
Software Engineer

Design a distributed rate limiter

Design a Rate Limiter with Burst Allowance and Distributed Coordination Context You are designing a rate limiter for an API gateway that serves high Q...

System DesignRate LimitingConcurrency
21
0
203 people solved
Sep 6, 2025
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