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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
Meta logo
Meta
Medium
Product Manager

Who Gains From Capital One's Free Shopping Extension, and How the Bank Benefits

Capital One offers Capital One Shopping, a free tool that finds coupon codes, compares prices and earns rewards for people shopping online. Explain th...

Product Design & StrategyGrowth & MonetizationProduct Strategy
0
0
6 people solved
Nov 16, 2024
Amazon logo
Amazon
Hard
Software Engineer Locked

Serialize and deserialize a binary tree

This question evaluates competency in designing robust serialization formats and manipulating binary tree data structures, including preservation of s...

Coding & AlgorithmsTreesParsing & Interpreters
11
0
96 people solved
Jan 22, 2026
PayPal logo
PayPal
Hard
Data Scientist

Design fraud detection from raw transactions

Design fraud detection from raw transactions System Design: End-to-End Transaction Fraud Detection Context You are given a large, multi-table dataset ...

ML System Design
10
0
112 people solved
Jul 31, 2025
Meta logo
Meta
Medium
Product Manager

WhatsApp Behind the Scenes: Key Components, Data Flow and Design Trade-offs

Design the high-level system architecture behind WhatsApp, the mobile messaging app. This is a technical round for a product manager, so focus on the ...

System DesignTechnical Tradeoffs for PMsReal-Time Systems
1
0
8 people solved
Jan 22, 2024
Meta logo
Meta
Medium
Machine Learning Engineer

Maximize one stock trade profit

You're given an array prices of length n where prices[i] is the stock price on day i. You may complete at most one transaction (buy once, then sell la...

Coding & Algorithms
4
0
60 people solved
Sep 6, 2025
Optiver logo
Optiver
Medium
Data Scientist

Compute expected counters after color elimination

Compute expected counters after color elimination Problem You have a bag with 30 counters: 10 red, 10 yellow, and 10 blue. You draw counters uniformly...

Statistics & MathProbabilityPuzzles & Brainteasers
6
0
116 people solved
Jul 17, 2025
Meta logo
Meta
Medium
Software Engineer

Check near-palindrome with one deletion

Check near-palindrome with one deletion Given a string s, determine whether it can become a palindrome after deleting at most one character. Return bo...

Coding & Algorithms
7
0
50 people solved
Aug 7, 2025
NVIDIA logo
NVIDIA
Hard
Software Engineer

Explain optimization and tensor vs pipeline parallelism

Task: Deep Learning Optimization and Parallelism You are asked to explain optimization techniques commonly used to improve deep learning training and ...

Machine LearningNeural Networks & TrainingLLM Inference & Serving
6
0
88 people solved
Sep 6, 2025
Google logo
Google
Medium
Product Manager

Reduce YouTube App Battery Drain on Phones With No Visible Product Changes

You are a product manager for the YouTube mobile app and have been asked to make the app use less battery, with one constraint: you may not change the...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
0
0
6 people solved
May 14, 2026
Shopify logo
Shopify
Medium
Data Scientist Locked

Optimize attempts in a timed logic test

This question evaluates a candidate's understanding of expected value, time-constrained optimization, efficiency metrics (score per second), and discr...

Statistics & Math
7
0
87 people solved
Oct 13, 2025
PayPal logo
PayPal
Medium
Software Engineer

Describe std::string copy semantics

Describe std::string copy semantics In C++, what happens with std::string when you write: std::string a = "123"; std::string b = a; Describe which ope...

Coding & Algorithms
6
0
62 people solved
Aug 7, 2025
Amazon logo
Amazon
Medium
Data Scientist

Assess Culture Fit Through Behavioral Interview Questions

Behavioral Interview: Culture Fit and Leadership You are interviewing for a Data Scientist role. The interviewer is assessing culture fit, decision-ma...

Behavioral & LeadershipInnovation & SimplificationCommunication & Stakeholders
24
0
99 people solved
Jul 12, 2025
Uber logo
Uber
Hard
Data Scientist Locked

Measure driver experience quantitatively

This question evaluates a data scientist's competencies in designing composite metrics, event-level aggregation, statistical validation, debiasing for...

Analytics & Experimentation
4
0
71 people solved
Oct 13, 2025
Amazon logo
Amazon
Easy
Data ScientistSenior+

Describe a challenging project

You are interviewing for an L5 Data Scientist role. Answer the following behavioral questions in a way that demonstrates Deliver Results: 1. Tell me a...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
10
0
97 people solved
Jan 12, 2026
Google logo
Google
Medium
Product Manager

Product sense: a camera built around how Instagram users capture and post

Design a camera made for people who use Instagram: pick which of them it should serve, decide what it should do, and explain how you would measure whe...

Product Design & StrategyProduct Sense
0
0
5 people solved
Sep 2, 2025
Paytm logo
Paytm
Medium
Product Manager

Motivation Question: Explaining the Origin of Your Passion for Technology

In a product manager interview you are asked what first drew you to technology. How would you answer? `hint One real moment Choose a single, specific ...

Behavioral & LeadershipMotivation & Fit
0
0
6 people solved
Sep 22, 2024
Amazon logo
Amazon
Medium
Product Manager

Behavioral PM Interview: A Hard-Earned Product Lesson and Proof You Still Apply It

You are in a behavioral round for a product manager role at Amazon. The interviewer asks: of everything your product work has taught you so far, which...

Behavioral & LeadershipFailure & Learning
0
0
7 people solved
Mar 10, 2026
Meta logo
Meta
Easy
Data Scientist

Determine Posterior Probability of Bad User Prediction

Posterior Probability for a Bad-Actor Classifier You are evaluating a binary classifier that flags bad actors among users. Given: - 5% of users are tr...

Statistics & Math
35
0
155 people solved
Jul 12, 2025
Grammarly logo
Grammarly
Hard
Software Engineer

Solve interval merge and string dedup problems

You are given three coding questions from a phone screen. Solve each independently. 1) Merge overlapping intervals Input: A list of intervals interval...

Coding & AlgorithmsStacks & QueuesIntervals & Scheduling
46
0
321 people solved
Oct 22, 2025
Two Sigma logo
Two Sigma
Medium
Product Manager

Behavioral: Earning Buy-In from a Resistant Engineering Partner as a Product Manager

Describe a time when a technical stakeholder, such as an engineering lead, architect or platform owner whose work your product depended on, was hard t...

Behavioral & LeadershipConflict & CollaborationLeadership & Influence
0
0
9 people solved
Apr 7, 2025
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