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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
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Explain C++ Inline Semantics and Trade-Offs

Explain that C++ inline semantics permit suitable definitions across translation units but do not require call-site expansion. Evaluate compiler optim...

Software Engineering Fundamentals
8
0
79 people solved
May 15, 2026
Airbnb logo
Airbnb
Medium
Machine Learning EngineerSenior+

Design User Embedding Semantic Search

Design a user-embedding-based two-stage semantic retrieval and ranking system for a short-term rental marketplace. The goal is to retrieve and rank pr...

ML System Design
19
0
127 people solved
Apr 28, 2026
OpenAI logo
OpenAI
Easy
Machine Learning Engineer Locked

How would you build an image classifier with dirty data?

This question evaluates a candidate's ability to design end-to-end image classification systems and manage noisy image datasets, testing competencies ...

ML System DesignData Quality & Validation
60
0
582 people solved
Jan 6, 2026
Upstart logo
Upstart
Easy
Data Scientist

Implement factorial and count trailing zeros

Answer the following coding questions in Python. 1) Implement factorial Implement a function factorial(n) that returns \(n!\) for a non-negative integ...

Coding & AlgorithmsMath & Number Theory
11
0
182 people solved
Dec 9, 2025
Meta logo
Meta
Medium
Machine Learning Engineer

Optimize ribbon piece length by binary search

Given an array lengths of positive integers and an integer k, you may cut each element into pieces of integer length L > 0. Find the maximum L such th...

Coding & Algorithms
6
0
88 people solved
Sep 6, 2025
Airbnb logo
Airbnb
Medium
Software Engineer

Design an extensible request Retryer

Problem You are building a small library component called a Retryer that wraps an operation (typically a network call) and retries it on failure. Requ...

Software Engineering FundamentalsLow-Level Design (OOP)Code Quality & Maintainability
9
0
170 people solved
Oct 13, 2025
Discord logo
Discord
Medium
Software Engineer

Debug and mitigate a CPU spike incident

Production Debugging: CPU Spike Incident (Open-Ended) You are on-call for a backend service. An alert fires: CPU usage suddenly spikes on the service’...

Software Engineering FundamentalsReliability & SREDebugging
43
0
334 people solved
Oct 25, 2025
Uber logo
Uber
Medium
Data Scientist

Compute ETA shift and conversion uplift

Use PostgreSQL (SQL) and brief Python pseudocode. Assume 'today' is 2025-09-01. Schema: - trips(trip_id BIGINT, request_ts TIMESTAMP, city_id INT, rid...

Data Manipulation (SQL/Python)
4
0
37 people solved
Oct 13, 2025
Google logo
Google
Medium
Data Scientist

Diagnose a metric drop in search time

Over the last 3 calendar months, the metric 'searching time per user per session' dropped by 35%. A teammate proposes modeling two distributions: T1 =...

Analytics & ExperimentationMetric DiagnosticsTime Series & Forecasting
9
1
125 people solved
Oct 13, 2025
Google logo
Google
Easy
Software Engineer

Compute max coins with 3-step token moves

You are given a one-dimensional board with n positions represented by a string s of length n: - . = empty cell - T = token - C = coin You may move tok...

Coding & AlgorithmsGreedy
36
0
249 people solved
Oct 16, 2025
Virtu Financial logo
Virtu Financial
Hard
Quantitative Researcher Locked

Birthday Collisions and the Closest Pair of Birthdays

Work through birthday collision probabilities, the 50 percent threshold, and the closest-pair spacing among 300 birthdays. The discussion separates di...

Statistics & Math
3
0
31 people solved
Aug 21, 2026
Google logo
Google
Hard
Software Engineer

Design key management service

Design a Key Management Service (KMS) You are asked to design a production-grade, multi-tenant Key Management Service. A client provides a key identif...

System DesignCryptographyApplication Security
17
2
281 people solved
Sep 6, 2025
Aim Intelligent Machine logo
Aim Intelligent Machine
Medium
Software EngineerSenior+ Locked

Merge Overlapping Closed Intervals into a Sorted Disjoint List

A coding problem that asks you to merge a list of closed integer intervals, given in any order, so that every group of overlapping intervals becomes o...

Coding & AlgorithmsIntervals & SchedulingSorting
2
0
39 people solved
Sep 14, 2026
xAI logo
xAI
Medium
Software Engineer Locked

Design backend to score and classify tweets

This question evaluates backend system design skills including data modeling and ingestion, integration with external LLM-style inference APIs, worker...

System DesignSystem Design FundamentalsData Quality & Validation
19
0
163 people solved
Dec 1, 2025
Soti logo
Soti
Medium
Software Engineer

Design an IP blacklist API

Design an API and backend service for an IP firewall blacklist system. The service should allow security administrators or automated abuse-detection s...

System Design
3
0
48 people solved
Apr 23, 2026
Otter.Ai logo
Otter.Ai
Medium
Data EngineerSenior+

Find Every Project with the Most Employees

The interview report explicitly identified the “Project with Most Employees” SQL exercise. Use the following self-contained PostgreSQL schema: `text e...

Data Manipulation (SQL/Python)
3
0
46 people solved
Apr 2, 2026
Sierra logo
Sierra
Medium
Product Manager

Diagnosing a Falling Core Metric and Choosing What to Build to Recover It

One of your product's key metrics has started to decline. How would you work out why, and how would you then decide what to build in response? Clarify...

Analytics & ExperimentationMetric DiagnosticsPrioritization & Tradeoffs
1
0
13 people solved
May 23, 2026
Capital One logo
Capital One
Easy
Data Scientist Locked

Design robber detection from surveillance video

This question evaluates applied machine learning and computer vision system-design skills, including precise task definition, data and labeling strate...

Machine LearningML System DesignComputer Vision
72
0
772 people solved
Feb 22, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Implement crawler and file deduplication

This question evaluates competencies in concurrent programming, web crawling and graph traversal, thread safety, rate limiting, I/O-efficient file ded...

Coding & AlgorithmsConcurrencyAPI Integration & HTTP Clients
18
0
144 people solved
Feb 28, 2026
Zoox logo
Zoox
Medium
Data EngineerSenior+

Write Transaction Analytics SQL Queries

You are given a credit-card transaction dataset with the following tables. transactions | column | type | description | |---|---|---| | transaction_id...

Coding & Algorithms
6
0
81 people solved
Apr 11, 2026
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