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Master your tech interviews with 18,000+ real questions from top companies.

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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
LinkedIn logo
LinkedIn
Medium
Data Scientist Locked

Explain variance reduction in random forests

This question evaluates understanding of variance reduction in ensemble methods, the impact of inter-tree correlation on averaged predictors, and the ...

Machine LearningML FundamentalsSupervised Learning
15
0
102 people solved
Feb 19, 2026
Two Sigma logo
Two Sigma
Medium
Data Scientist

Perform no-intercept linear regression from two datasets

You are given two pandas datasets to fit an OLS model without an intercept (through origin). Dataset A (features): df_X(user_id, clicks, impressions)....

Machine LearningRegression & Statistical ModelingPandas & Python Data
32
0
234 people solved
Oct 13, 2025
Google logo
Google
Medium
Software EngineerSenior+

Resolving a Coworker Conflict and Competing Views Within a Team

In a behavioral round for a Staff software engineer role, the interviewer asks two related questions about disagreement at work. Answer each with a re...

Behavioral & LeadershipConflict & Collaboration
1
0
13 people solved
Mar 27, 2026
Meta logo
Meta
Medium
Product Manager

Metrics Plan for Meta Ads That Drive Foot Traffic to Physical Stores

You are the product manager for Meta's advertising products built for offline shops: businesses that make their sales in physical stores rather than o...

Analytics & ExperimentationMetrics & KPIsCausal Inference
1
0
11 people solved
May 15, 2026
Sentry.Io logo
Sentry.Io
Medium
Software Engineer Locked

Design a Book Purchase Broker

Design a system for brokering book purchase requests across partner bookstores with target price constraints and expiration windows. The question eval...

System Design
2
0
29 people solved
Jun 12, 2026
Google logo
Google
Hard
Data Scientist Locked

Design and critique an abuse-detection ML system

This question evaluates system-design and production machine learning competencies including large-scale classification versus risk scoring, handling ...

Machine LearningML System DesignFairness & Bias
12
0
122 people solved
Oct 13, 2025
Veeva Systems logo
Veeva Systems
Medium
Product Manager

Letting Children Aged 10 to 16 Order Food on Swiggy: Product Design

Swiggy, the Indian food delivery app, wants an experience designed for young users aged 10 to 16. Design it. `hint Who orders, who pays, who receives ...

Product Design & StrategyProduct SensePrivacy & Compliance
1
0
14 people solved
Apr 1, 2026
Upstart logo
Upstart
Easy
Data ScientistSenior+

Combine noisy thermometers; compute random-walk correlations

Problem 1: Estimating a true temperature from noisy thermometers Assume the true (fixed) temperature is an unknown constant \(\theta\). 1a) One thermo...

Statistics & MathSampling & EstimationProbability
20
0
152 people solved
Oct 25, 2025
Bilt Rewards logo
Bilt Rewards
Medium
Software Engineer

Write SQL to Join Merchants and Triple Restaurant Points

You are given: ( 1) a CSV file merchants.csv with columns: merchant_name, merchant_code, category; ( 2) a database table transactions(user_id INT, mer...

Data Manipulation (SQL/Python)
10
0
89 people solved
Sep 6, 2025
Uber logo
Uber
Medium
Software Engineer

Simulate one-round color elimination on a grid

Given an m x n integer matrix board where board[r][c] > 0 represents a color and 0 represents empty: ( 1) A nonzero cell at (r,c) explodes in this rou...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
16
0
110 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Data Scientist

Retrieve First Active and Last Inactive Dates per User

Given a table activity that tracks user activities, write a SQL query to retrieve the first active date and last inactive date for each user. Table Sc...

Data Manipulation (SQL/Python)SQL
193
9
446 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Deliver an Important Project Under a Tight Deadline

Describe deadline-driven project delivery through business priorities, scope and quality tradeoffs, dependency management, and evidence of the deliver...

Behavioral & LeadershipOwnership & ExecutionPrioritization & Tradeoffs
2
0
27 people solved
Sep 14, 2026
Two Sigma logo
Two Sigma
Medium
Software Engineer

Maximum Group of Pairwise Strangers in an Acquaintance Tree

You are given a social network of n people, labeled 0 through n - 1. For some pairs of people, it is known that the two people in the pair know each o...

Coding & Algorithms
8
0
92 people solved
Jul 23, 2025
Google logo
Google
Medium
Software Engineer

Count user sessions from logs

Given a large log file where each line is "timestamp,user,action", compute the number of sessions per user. Assume a session ends if the gap between c...

Coding & AlgorithmsData Cleaning & WranglingArrays & Strings
22
0
168 people solved
Sep 6, 2025
Adobe logo
Adobe
Medium
Product Manager

Instagram Reels: Choosing a North-Star Metric, Creator Metrics and Guardrails

You are the product manager at Instagram who owns Reels, its short-form video feature. How would you define success for Reels, and how would you measu...

Analytics & ExperimentationMetrics & KPIs
1
0
11 people solved
Sep 30, 2025
Box logo
Box
Medium
Software Engineer

Identify and fix deadlock in locked code

Identify and fix deadlock in locked code Multithreaded Deadlock: Diagnose and Fix Context You have concurrent code that acquires multiple locks and oc...

System DesignConcurrencyDebugging
25
0
243 people solved
Aug 1, 2025
Shopify logo
Shopify
Hard
Data Scientist

Explain life story, project leadership, and negotiation

Behavioral & Leadership — HR Screen (Data Scientist) In a single, structured answer, address all items below with specific dates, names, and quantifie...

Behavioral & LeadershipMotivation & FitProject Deep Dive
13
0
110 people solved
Oct 13, 2025
Amazon logo
Amazon
Hard
Applied Scientist

Describe how you reduced measurable cost

Behavioral question (focus on ownership/delivery): > Tell me about a time you identified and solved a problem that caused measurable cost (e.g., cloud...

Behavioral & LeadershipOwnership & Execution
16
0
134 people solved
Feb 9, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Senior Engineer Behavioral: Explaining Something You Learned Recently and Applied

In a behavioral interview for a senior software engineer role, you are asked to describe one thing you have learned recently. Choose something specifi...

Behavioral & Leadership
1
0
20 people solved
Apr 15, 2026
Playstation logo
Playstation
Medium
Data ScientistSenior+

Design Experiments Under Network Interference

You are a Senior Data Scientist for a gaming platform such as PlayStation. Answer the following experimentation questions. 1. A/A test validation: The...

Analytics & Experimentation
7
0
56 people solved
Apr 2, 2026
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