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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Software Engineer

Describe conflict where you yielded to others

Describe a time you had a conflict or strong disagreement at work, but ultimately decided to follow someone else’s approach instead of your own. In yo...

Behavioral & LeadershipConflict & Collaboration
11
0
87 people solved
Dec 8, 2025
Amazon logo
Amazon
Medium
Data Scientist

Diagnose MySQL joins and GROUP BY/HAVING errors

You are using MySQL 8.0 with ONLY_FULL_GROUP_BY enabled. Answer all parts precisely. Provide the exact SQL you would run and the final result shapes/v...

Data Manipulation (SQL/Python)
1
0
16 people solved
Oct 13, 2025
Imc logo
Imc
Medium
Data Scientist Locked

Compute gambler’s ruin probabilities and hitting times

This question evaluates understanding of stochastic processes, Markov chains, and discrete-time random walks by requiring derivation of absorption pro...

Machine Learning
8
0
75 people solved
Jan 14, 2026
NVIDIA logo
NVIDIA
Hard
Data Scientist

Analyze overfitting, DenseNet, preprocessing, and cross-validation

Image Classification in Healthcare: End-to-End Interview Task Context: You are designing and evaluating an image-classification system for a healthcar...

Machine Learning
12
0
92 people solved
Oct 13, 2025
Citadel logo
Citadel
Medium
Software Engineer Locked

Check whether a string is a palindrome

This question evaluates string manipulation skills and basic algorithmic competency, specifically palindrome recognition and index-based character com...

Coding & AlgorithmsTwo Pointers & Sliding Window
12
0
90 people solved
Jan 9, 2026
WeRide logo
WeRide
Medium
Data Scientist

Compute window averages and merge intervals

Compute window averages and merge intervals You are given two independent pandas tasks. 1. Centered sliding-window average - Input DataFrame df with c...

Data Manipulation (SQL/Python)Pandas & Python DataIntervals & Scheduling
14
0
113 people solved
Jan 23, 2025
Meta logo
Meta
Medium
Data Scientist

Write SQL for comment analytics

You are given the following schema and tiny sample data. Schema: - users(user_id INT PRIMARY KEY, country VARCHAR, created_at DATE) - posts(post_id IN...

Data Manipulation (SQL/Python)
2
0
24 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Decide whether to sell both SKUs

Profit Impact of Introducing a Vegan Burger Context A restaurant is considering adding a Vegan burger alongside its existing Regular burger. The unit ...

Analytics & Experimentation
2
0
38 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Write SQL for CTR and revenue

Write SQL for the following two tasks. Problem 1: CTR during peak vs. non-peak hours You are given three tables: - ads(ad_id BIGINT, advertiser_id BIG...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
10
1
65 people solved
Jan 3, 2026
DRW logo
DRW
Hard
Machine Learning Engineer

Explain Transformers, activations, and training optimization

Explain Transformers, activations, and training optimization Modern Deep Learning: Conceptual Questions (ML Engineer Take-home) You are preparing for ...

Machine Learning
3
0
68 people solved
Jul 29, 2025
Xometry logo
Xometry
Medium
Machine Learning EngineerSenior+

Explain an End-to-End ML Project

In a first-round interview for a lead machine learning role, walk through your background and one machine learning project you led in detail. Your ans...

Machine Learning
3
0
37 people solved
Mar 7, 2026
DoorDash logo
DoorDash
Hard
Data Scientist Locked

Compute power and interpret guardrails

This question evaluates competency in experimental design and applied statistics for cluster-randomized A/B tests, covering cluster-robust inference, ...

Statistics & MathExperiment Analysis & ReadoutRegression & Statistical Modeling
4
0
86 people solved
Oct 13, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer

Define developer-centric usability metrics

Usability and Product Metrics Beyond Latency and Accuracy Context: In a technical screen focused on analytics and experimentation, propose how you wou...

Analytics & Experimentation
9
0
62 people solved
Sep 6, 2025
Meta logo
Meta
Hard
Software Engineer

Design a scalable banking system

System Design: Core Banking Platform Problem Design a banking system that supports: - Account creation - Balance inquiry - Deposit and withdrawal - At...

System Design
6
0
70 people solved
Sep 6, 2025
Airwallex logo
Airwallex
Medium
Data ScientistSenior+ Locked

Implement bootstrap mean and variance

This question evaluates the ability to implement bootstrap resampling and compute descriptive statistics, testing competency in statistical estimation...

Coding & Algorithms
5
0
48 people solved
Oct 24, 2025
Amazon logo
Amazon
Medium
Software Engineer

Find LCA in a BST

Find LCA in a BST Given the root of a binary search tree and two keys p and q, return the value of their lowest common ancestor (the deepest node whos...

Coding & Algorithms
3
0
54 people solved
Aug 10, 2025
Uber logo
Uber
Medium
Software EngineerIntern Locked

Minimum Delivery Cost Between Cities

This coding interview question evaluates cost optimization and routing over a city network with value-based moves and conditional directed discounts. ...

Coding & AlgorithmsGraphs
17
1
138 people solved
Jul 3, 2026
Uber logo
Uber
Hard
Data Scientist Locked

Build and deploy an uplift targeting model

This question evaluates a candidate's ability to design and deploy uplift/causal targeting models, covering causal inference, uplift estimation, pre-t...

Machine Learning
5
0
76 people solved
Oct 13, 2025
Capital One logo
Capital One
Medium
Data Scientist

Present Analytical Process and Recommendations for Credit-Card Profitability.

Presenting Credit-card Profitability Analysis to a Manager You need to brief your manager on an analysis of credit-card profitability and partnership ...

Behavioral & Leadership
27
0
122 people solved
Jul 12, 2025
Uber logo
Uber
Medium
Software Engineer Locked

Design a Stock Trading Platform

This question evaluates a candidate's ability to design a robust, scalable brokerage platform covering distributed systems architecture, transactional...

System DesignTrading SystemsDistributed Transactions & Idempotency
11
0
143 people solved
May 11, 2026
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