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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
Google logo
Google
Easy
Data Scientist Locked

Build next-word predictor with O(1) lookup

This question evaluates skills in language modeling, data structures, algorithmic optimization, and probabilistic sampling, within the Coding & Algori...

Coding & AlgorithmsData Structure DesignArrays & Strings
12
1
125 people solved
Feb 2, 2026
Two Sigma logo
Two Sigma
Medium
Data Scientist Locked

Evaluate a Piecewise Linear Function

This question evaluates understanding of linear interpolation, numerical reasoning with ordered 2D points, and input validation when computing values ...

Coding & Algorithms
8
0
68 people solved
Mar 3, 2026
Pinterest logo
Pinterest
Hard
Software Engineer

Design a Google Photos–like service

System Design: Google Photos–like Service (Web + Mobile) Context Design a large-scale consumer media service that ingests, stores, indexes, and serves...

System DesignFile & Media StoragePrivacy & Compliance
17
0
276 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Data Scientist

Calculate Profit and Analyze Vegan Burger Market Trends

Calculate Profit and Analyze Vegan Burger Market Trends Scenario Case study: a restaurant/foodservice brand is evaluating the introduction of a vegan ...

Analytics & Experimentation
107
0
301 people solved
Aug 4, 2025
Nextdoor logo
Nextdoor
Medium
Software Engineer

Which culture principle resonates and why

Culture-Fit Reflection: Principle, Evidence, and Thoughtful Critique Prompt After watching the company’s culture-fit video: 1. Select one specific pri...

Behavioral & Leadership
12
0
97 people solved
Sep 6, 2025
Perplexity logo
Perplexity
Medium
Product Manager

Product Sense: Pick a Product With Excellent User Experience and Explain Its Design

Pick a product whose user experience you think is excellent, and explain what makes its design work. `hint Anchor it in one user's moment Rather than ...

Product Design & StrategyProduct Sense
1
0
11 people solved
May 12, 2026
Amazon logo
Amazon
Medium
Software EngineerIntern

Find Most Frequent Values

Given an integer array nums and an integer k, return the k distinct values that occur most frequently in nums. The result may be returned in any order...

Coding & Algorithms
7
0
58 people solved
Mar 18, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Design a multi-size storage locker system

This question evaluates a candidate's system-design skills, including distributed systems architecture, resource allocation/bin-packing reasoning for ...

System DesignSystem Design FundamentalsLow-Level Design (OOP)
11
0
114 people solved
Jan 2, 2026
Google logo
Google
Hard
Software Engineer

Scale median under memory constraints

Scale median under memory constraints Design a Scalable Streaming Median Service Under Memory Constraints Context You are building a service that cons...

System DesignSystem Design FundamentalsBatch & Stream Processing
12
0
102 people solved
Aug 8, 2025
Meta logo
Meta
Medium
Software Engineer

Design a chat messaging system

Design a chat system similar to WhatsApp/Messenger. Requirements: - 1:1 and group chats. - Send/receive messages in real time when online; store-and-f...

System Design
7
0
56 people solved
Feb 25, 2026
Dropbox logo
Dropbox
Medium
Product Manager

How Much Data Does Dropbox Hold? Sizing Stored Bytes Across Free, Paid and Team Users

You are interviewing for a product manager role at Dropbox. Estimate how much data Dropbox stores in total. `hint Quota is not usage A plan's storage ...

Product / Decision MakingEstimation & Market Sizing
0
0
11 people solved
Oct 29, 2025
Capital One logo
Capital One
Easy
Data Scientist

Calculate first-year profit margin

Profit Margin Calculation (Year 1) Context: A single product is sold in Year 1. m denotes million. Given: - Fixed costs: $375m - Units sold (Regular):...

Statistics & Math
6
0
54 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer Locked

Find minimum time to cross bridge with flashlight

This question evaluates algorithmic problem-solving and optimization skills, including modeling constrained state transitions, reasoning about trade-o...

Coding & Algorithms
5
0
73 people solved
Jan 14, 2026
Amazon logo
Amazon
Medium
Software Engineer

Validate 9x9 grid in one pass

Validate 9x9 grid in one pass Given a partially filled 9x9 board using digits '1'–'9' and '.' for empty cells, determine whether the current configura...

Coding & Algorithms
10
0
102 people solved
Aug 9, 2025
Salesforce logo
Salesforce
Easy
Backend Engineer

Design an Elevator Control System

Design an object-oriented elevator control system for a building with multiple floors and multiple elevators. The system should support: - Hall reques...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
18
0
158 people solved
Dec 4, 2025
NVIDIA logo
NVIDIA
Hard
Data Scientist

Design and secure a REST inference API

Design a REST API for Image Inference with Grad-CAM You are designing a public REST API for an image-inference service that accepts large images and r...

Coding & Algorithms
6
0
96 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

Clean OCR data and build an LLM dataset

This question evaluates competency in OCR data cleaning and normalization, dataset engineering for LLM fine-tuning, quality filtering, and evaluation ...

Machine LearningData Cleaning & WranglingAnnotation & Label Quality
9
0
128 people solved
Feb 11, 2026
Point72 logo
Point72
Medium
Quantitative Researcher

Solve Three Probability Models

Solve Three Probability Models Solve three independent probability questions. Show the sample space or stochastic assumptions in each part and give an...

Statistics & Math
4
0
59 people solved
Dec 14, 2025
Turo logo
Turo
Medium
Software Engineer

Route HTTP requests to pods in a cluster

In a Docker/Kubernetes-like container cluster running multiple replicas (pods) of a service, explain how an incoming HTTP request reaches a specific p...

System Design
11
0
89 people solved
Feb 12, 2026
Point72 logo
Point72
Hard
Data Scientist

How would you explain PCA and SHAP?

Question You are interviewing for a Data Scientist role at Point72, a systematic / quantitative investment firm. The interviewer asks you to pick one ...

Machine LearningSupervised LearningFeature Engineering
15
0
204 people solved
Oct 24, 2025
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