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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Amazon logo
Amazon
Hard
Software Engineer

Design Thread-Safe Tagging and Bookstore Systems

Design Thread-Safe Tagging and Bookstore Systems System Design and OO Design (Onsite) Part 1: Thread-Safe Document–Tag Design Design object-oriented c...

System Design
9
0
75 people solved
Aug 4, 2025
Pinterest logo
Pinterest
Medium
Data Scientist

Implement scalable prime generator

Write a function first_n_primes(n) that returns the first n prime numbers in ascending order. Constraints: - 1 ≤ n ≤ 100,000. - Aim for O(n log log n)...

Coding & Algorithms
6
0
77 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Design a Multi-Provider Financial Dashboard

Design a financial dashboard that shows account balances, stock holdings, cryptocurrency holdings, and derived portfolio metrics. Data arrives from mu...

System Design
3
0
39 people solved
Feb 2, 2026
Intuit logo
Intuit
Easy
Product Analyst

Design an experiment to evaluate an onboarding progress bar

Scenario In a QuickBooks-like onboarding flow, the product team adds a progress bar. The onboarding has 4 steps: 1. Onboard 2. Send payment 3. Set up ...

Analytics & Experimentation
5
0
60 people solved
Oct 21, 2025
PayPal logo
PayPal
Medium
Data Scientist

Boost User Login Rate: Key Metrics to Monitor

Boost User Login Rate: Key Metrics to Monitor Scenario You are the product data scientist responsible for improving a consumer fintech platform's user...

Analytics & Experimentation
6
0
87 people solved
Aug 4, 2025
PayPal logo
PayPal
Easy
Data Scientist Locked

Design and evaluate a fraud detection strategy

This question evaluates fraud domain knowledge, quantitative model evaluation, metrics and diagnostic design, operational strategy formulation, segmen...

Analytics & ExperimentationModel EvaluationMetrics & KPIs
6
0
101 people solved
Jan 17, 2026
TikTok logo
TikTok
Hard
Software Engineer

Design a global notification service

Design a global notification service System Design: Globally Distributed Notification Service Context You are designing a multi-tenant notification pl...

System DesignSystem Design FundamentalsFault Tolerance & Failover
12
0
93 people solved
Jul 17, 2025
Adobe logo
Adobe
Easy
Data Scientist

Understand P-Value's Role in Product Decision-Making

Understand P-Value's Role in Product Decision-Making Scenario You are a data scientist presenting A/B test results to non-technical executives who mus...

Statistics & Math
5
0
84 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Software EngineerSenior+

Find the First Unique IP

You are processing a chronological stream of server hit records. Each record contains an IP address as a string. Design and implement a component that...

Coding & AlgorithmsData Structure Design
21
0
202 people solved
Apr 23, 2026
Meta logo
Meta
Hard
Data Scientist

Identify User Interest in Group Video Calls Using Data

Identify User Interest in Group Video Calls Using Data You are designing and analyzing a new group video-calling feature for a large social or messagi...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
176
3
317 people solved
Jul 12, 2025
Google logo
Google
Medium
Data Scientist

Write SQL/Python for messy event data

Using the schema and sample data below, write: (1) a single SQL query to compute daily metrics for the local date 2025-09-01 in America/Los_Angeles, a...

Data Manipulation (SQL/Python)SQLPandas & Python Data
8
0
64 people solved
Oct 13, 2025
Snapchat logo
Snapchat
Medium
Software Engineer

Explain median vs mean for L1/L2

Median vs. Mean Under L1 and L2 Loss, and the 2D Extension Explain, with intuition and a brief derivation, the relationship between the choice of loss...

Statistics & MathSampling & Estimation
27
0
212 people solved
Sep 6, 2025
LinkedIn logo
LinkedIn
Hard
Data Scientist

LinkedIn Product Case Opportunity Sizing

LinkedIn Product Case: Segmentation, Opportunity Sizing, and Adoption Prediction You are interviewing for a Data Scientist role focused on analytics a...

Analytics & ExperimentationSegmentation & Cohort AnalysisEstimation & Market Sizing
14
0
114 people solved
Apr 30, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Count changed nodes in N-ary trees

Question Given two N-ary trees (old and new versions) where each node has a key (string), value (int), and list of children, compute how many nodes ar...

Coding & Algorithms
16
0
67 people solved
Jul 29, 2025
Bitkernel logo
Bitkernel
Medium
Software Engineer

Analyze TCP three-way handshake states

During TCP connection establishment (the three-way handshake), exactly one of the following statements is correct. Identify which one, and be prepared...

Software Engineering Fundamentals
3
0
50 people solved
Oct 24, 2025
Meta logo
Meta
Medium
Software Engineer

Solve island connectivity and string multiplication

Question Given N distinct islands (e.g., a, b, c…) and a list of existing undirected paths between them, compute the minimum number of additional path...

Coding & Algorithms
12
0
67 people solved
Jul 29, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Analyze Driver Requests for Food Delivery Orders

ORDER_TABLE order_id | restaurant_id | created_at | total_value 1 | 101 | 2024-06-01 12:01 | 45.50 2 | 102 ...

Data Manipulation (SQL/Python)
4
0
32 people solved
Aug 4, 2025
Hive.Ai logo
Hive.Ai
Hard
Software Engineer Locked

Calculate Trapped Rain Water

Calculate how much rain water is trapped between nonnegative unit-width bars without mutating the input. A two-pointer scan tracks the highest boundar...

Coding & Algorithms
1
0
17 people solved
Jun 8, 2026
Meta logo
Meta
Medium
Data Scientist

Analyze Ad CTR and Convert Transactions to USD

AdsImpressions +-----------+---------+------------+--------+-----------+ | user_id | ad_id | impressions| clicks | event_dt | +-----------+------...

Data Manipulation (SQL/Python)
127
0
514 people solved
Aug 4, 2025
Meta logo
Meta
Hard
Data Scientist

Design an A/B Test for Group Video Calls Impact

Design an A/B Test for Group Video Calls Impact A/B Experiment Design: Group Video Calls on Instagram Scenario Instagram wants to evaluate the impact ...

Analytics & Experimentation
5
0
56 people solved
Aug 4, 2025
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