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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
569
Updated
10.02.2026
11.9k Questions 569 Companies10.02.2026
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
Uber logo
Uber
Medium
Software Engineer Locked

Compute time for virus to infect grid

This question evaluates a candidate's ability to reason about grid-based state propagation, algorithmic problem solving, and performance consideration...

Coding & AlgorithmsGrids & Matrices
24
0
186 people solved
Feb 12, 2026
Oracle logo
Oracle
Easy
Data ScientistIntern Locked

Count closed islands in a grid

This question evaluates grid traversal and connected-component detection skills, focusing on 4-directional adjacency and boundary-condition reasoning ...

Coding & Algorithms
10
0
72 people solved
Feb 18, 2026
Pinduoduo logo
Pinduoduo
Medium
Software Engineer Locked

Design a Recency-Eviction Cache

This question evaluates proficiency with data structures and algorithmic design for implementing a fixed-capacity key-value cache that enforces recenc...

Coding & Algorithms
6
0
45 people solved
Feb 21, 2026
ByteDance logo
ByteDance
Hard
Machine Learning Engineer

Count Special Subarrays by Modular Frequency

You are given an integer array nums, and two integers modulo and target, where 0 <= target < modulo. Call an index i special if nums[i] % modulo == ta...

Coding & Algorithms
1
0
13 people solved
Oct 8, 2025
Coinbase logo
Coinbase
Hard
Data Scientist

Detect and quantify wash trading

Detecting and Quantifying Wash Trading on a Centralized Exchange Context You are designing an analytics approach for a centralized exchange to detect ...

Analytics & ExperimentationTrading SystemsFeature Engineering
10
0
89 people solved
Oct 13, 2025
Snapchat logo
Snapchat
Hard
Data Scientist

Design an experiment for spam filtering impact

Experiment Design: Stricter Spam Filter Impact on Friend Requests Context You run a social app with a friend-request system. A stricter spam filter wi...

Analytics & Experimentation
4
0
56 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze daily comments distribution and sampling

Daily Comments per Active User: Sampling and Inference You have, for a given day d, the count of comments made by each active user. Let there be m act...

Statistics & Math
8
0
58 people solved
Oct 13, 2025
Hard
Data Scientist

Design an A/B test for a Celebrate reaction

Experiment Design: Adding a "Celebrate" Reaction to WeChat Moments Context WeChat Moments is a friend-based social feed with posting, viewing, and rea...

Analytics & Experimentation
3
0
42 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist Locked

How should you renew or replace a show?

This question evaluates financial modeling, causal attribution, probabilistic decision-making, and strategic portfolio analysis skills for a Data Scie...

Analytics & ExperimentationBusiness Case AnalysisMetrics & KPIs
15
0
107 people solved
Feb 22, 2026
Meta logo
Meta
Medium
Software Engineer

Design a real-time game leaderboard

Design a real-time leaderboard for an online game. Requirements: - Players submit score updates frequently. - Query top N players globally and per reg...

System DesignSystem Design FundamentalsReal-Time Systems
11
0
90 people solved
Feb 25, 2026
Meta logo
Meta
Medium
Software Engineer Locked

Design a fitness tracking app

This question evaluates a candidate's competency in designing end-to-end backend architectures, specifying core APIs, modeling workout and geospatial ...

System Design
7
0
65 people solved
Mar 12, 2026
Meta logo
Meta
Medium
Software Engineer

Design a post privacy/visibility system

Design a privacy system for social media posts (similar to Facebook post privacy). Requirements: - Each post can be: Public, Friends, Friends-of-frien...

System Design
5
0
54 people solved
Feb 25, 2026
S
Sunrise
Easy
Software Engineer

Explain the least squares method

Explain the least squares method Explain the least squares method: - What optimization problem does ordinary least squares (OLS) solve? - Derive the c...

Machine Learning
4
0
47 people solved
Jul 21, 2025
Netflix logo
Netflix
Hard
Data Scientist

Demonstrate handling dismissive stakeholders with candor

Behavioral Prompt: Managing Adversarial Dynamics While Driving Outcomes Context You are interviewing onsite for a Data Scientist role. A senior interv...

Behavioral & LeadershipConflict & CollaborationCommunication & Stakeholders
11
0
123 people solved
Oct 13, 2025
Point72 logo
Point72
Medium
Data Scientist

Classify relationships for multiple circle pairs

Given an array pairs of N circle pairs, where each circle is (x, y, r) with integer coordinates and r ≥ 0, classify each pair into one of: IDENTICAL (...

Coding & Algorithms
8
0
77 people solved
Oct 13, 2025
Upstart logo
Upstart
Easy
Data Scientist Locked

Determine distribution of aX+b when X~N(0,1)

This question evaluates understanding of affine transformations of the normal distribution, moment calculation, and probability density manipulation, ...

Statistics & Math
9
0
66 people solved
Oct 13, 2025
Bitkernel logo
Bitkernel
Medium
Software Engineer

Evaluate C for-loop execution count

In C, variables m and n are both of type int. Consider the following code: `c int m, n; for (m = 0, n = -1; n = 0; m++, n++) n++; ` In standard C ...

Software Engineering Fundamentals
3
0
37 people solved
Oct 24, 2025
EY logo
EY
Medium
Data Scientist

Explain education-to-impact alignment

Data Scientist Technical Screen: Education/Experience Evidence and Impact Examples Context You are interviewing for a Data Scientist role in a technic...

Behavioral & Leadership
3
0
42 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Hard
Data Scientist

Reverse a singly linked list robustly

Reverse a Singly Linked List In-Place Context: You are given the head of a standard singly linked list (each node has value and next). Implement and e...

Coding & Algorithms
5
0
60 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Data Scientist

Choose linear regression or decision tree appropriately

Choose Between Linear Regression and a Decision Tree Under a Hinge and Interaction DGP Context You have 100,000 i.i.d. observations with features x1 (...

Machine Learning
5
0
63 people solved
Oct 13, 2025
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