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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
Intuit logo
Intuit
Medium
Software EngineerSenior+ Locked

Design a "Future Best-Sellers" Prediction and Recommendation System

This question evaluates a candidate's ability to design a large-scale ML/forecasting system that combines predictive modeling with low-latency serving...

ML System DesignSystem Design FundamentalsTime Series & Forecasting
14
0
138 people solved
Jun 30, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+ Locked

Find Unique Zero-Sum Triplets

Find unique zero-sum triplets with distinct indices, deterministic ordering, careful duplicate suppression, and explicit time and space analysis.

Coding & AlgorithmsTwo Pointers & Sliding WindowSorting
5
0
100 people solved
Sep 10, 2026
Atlassian logo
Atlassian
Medium
Software Engineer Locked

Implement sliding-window rate limiter function

This question evaluates proficiency with streaming algorithms and sliding-window data structures, focusing on time-based rate limiting, efficient coun...

Coding & AlgorithmsRate LimitingStacks & Queues
16
1
234 people solved
Feb 11, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Design a Product Image Upload Pipeline for Sellers

Design a seller-facing product image pipeline from direct upload through validation, transformation, moderation, and delivery. Address replacement and...

System Design
14
0
110 people solved
Aug 22, 2026
Anthropic logo
Anthropic
Medium
Product Manager

Dynamic Batching for Synchronous Model Inference on One GPU with a 100-Input Cap

Design the batching layer for a model server that runs inference on a single GPU. The GPU can process at most 100 inputs per batch, each caller submit...

System DesignTechnical Tradeoffs for PMsLLM Inference & Serving
3
0
24 people solved
Apr 30, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Design a Real-Time Online Typing Game With Fair Races and Crash Recovery

Design an online typing game. The report names only the problem; the discussion it describes covered the read and write paths, changes needed at scale...

System DesignMultiplayer Game SystemsFault Tolerance & Failover
1
0
11 people solved
Jul 13, 2026
Siemens logo
Siemens
Medium
Machine Learning EngineerSenior+

Explain SFT, DPO, PPO, and the Role of KL Regularization

Explain the objectives and practical differences among supervised fine-tuning (SFT), Direct Preference Optimization (DPO), and PPO-based language-mode...

Machine LearningFine-Tuning & Alignment TechniquesReinforcement Learning
5
0
38 people solved
Sep 4, 2026
Google logo
GoogleTaniumMicrosoftAmazon

Also asked at Microsoft, Amazon

Medium
Software Engineer

Can Fixed-Length Jumps Reach a Zero?

Problem Begin at index start of the nonnegative array arr. From index i, the next jump must land at i+arr[i] or i-arr[i], and must stay inside the arr...

Coding & AlgorithmsGraphs
1
0
16 people solved
Nextdoor logo
Nextdoor
Medium
Machine Learning Engineer

Merge overlapping weekly time intervals

You are given a list of time intervals representing meetings. Each interval is a pair of strings in the format: - "<Day> <H>:<MM>" (24-hour time) - <D...

Coding & AlgorithmsIntervals & SchedulingSorting
25
0
194 people solved
Mar 1, 2026
Reddit logo
Reddit
Hard
Data ScientistSenior+ Locked

Estimate Incremental Search-Ad Revenue Without an A/B Test

Practice estimating incremental search-ad revenue when 100 eligible users are randomly assigned to treatment outside a conventional A/B platform. Defi...

Analytics & ExperimentationExperiment Analysis & ReadoutBusiness Case Analysis
26
0
176 people solved
Jun 24, 2026
Visa logo
Visa
Medium
Software EngineerSenior+

Find the Index of a Target in a Sorted Array of Distinct Integers

Given an array nums of distinct integers sorted in strictly increasing order and an integer target, return the position of target in nums. If target i...

Coding & AlgorithmsBinary Search
4
2
34 people solved
Aug 6, 2026
Google logo
GoogleMicrosoftMeta

Also asked at Meta, Bloomberg, Amazon

Medium
Software Engineer

Decide the Winner of Optimal End-Pile Stone Selection

Problem Two players alternately take an entire pile from either end of a row, with the first player moving first. Both maximize their final stone tota...

Coding & AlgorithmsMath & Number TheoryDynamic Programming
0
0
10 people solved
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Goldman Sachs, Meta, Flipkart, Salesforce

Medium
Software Engineer

Maximize the Smallest Separation

Problem There are baskets at the distinct coordinates in position. Place exactly m balls, at most one in each basket. The separation of two balls is t...

Coding & AlgorithmsBinary SearchGreedy
0
0
8 people solved
Netflix logo
Netflix
Medium
Software EngineerSenior+

Implement Caches, Undo, and Traversal

Solve the following coding tasks. For each task, define clean APIs, implement the core logic, and be prepared to explain time and space complexity. Ta...

Coding & Algorithms
15
0
136 people solved
Apr 3, 2026
Reddit logo
Reddit
Medium
Machine Learning EngineerSenior+ Locked

Design Comment Prediction Ranking System

This question evaluates proficiency in end-to-end machine learning system design for predicting user engagement, specifically the probability of a use...

ML System DesignRanking Models
22
0
265 people solved
Jun 4, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer Locked

Design a Transactional Key-Value Store

Design layered transactional key-value lookup and reason explicitly about deletion, nested commit, rollback, and missing-key semantics.

Software Engineering Fundamentals
3
0
42 people solved
May 15, 2026
Google logo
Google
Medium
Product Manager

Designing and launching an end-of-year photo highlights recap in Google Photos

You are a product manager on Google Photos, and the team wants a Yearly Recap: a personalized look back at each user's photos and videos from the past...

Product Design & StrategyProduct Design & ImprovementRequirements & Launch Execution
1
0
9 people solved
Aug 27, 2026
Justworks logo
Justworks
Medium
Product Manager

Keeping a launch on track as requirements keep growing: a scope-control behavioral story

Walk me through a project where the requirements kept growing after work had started. How did you handle the extra requests, and how did the project t...

Behavioral & LeadershipPrioritization & TradeoffsCommunication & Stakeholders
0
0
6 people solved
Sep 21, 2026
Purestorage logo
Purestorage
Medium
Software Engineer

Design a thread-safe event dispatcher

Problem: "Event fire" / event dispatcher with multithreading Design an in-memory event system that supports registering listeners and firing events. C...

Software Engineering FundamentalsConcurrencyData Structure Design
55
0
638 people solved
Nov 5, 2025
Meta logo
Meta
Easy
Software Engineer

Implement four coding challenges

You are asked to solve the following four independent coding problems. --- 1) Block Placement Simulator (Tetris-like) You have an empty n x m grid (ro...

Coding & AlgorithmsSimulation & State MachinesArrays & Strings
16
0
147 people solved
Feb 8, 2026
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