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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
Navan logo
Navan
Medium
Software Engineer

Model booking auxiliary comments with admin updates

Design an object-oriented model (and high-level system design) for a booking system feature that stores auxiliary comments on a reservation. Core requ...

System DesignLow-Level Design (OOP)Authentication & Authorization
10
0
136 people solved
Nov 7, 2025
Airbnb logo
Airbnb
Hard
Data Scientist Locked

Design and assess an A/B test

This question evaluates a data scientist's competency in experimental design, statistical power and sample-size estimation, metric definition and guar...

Analytics & ExperimentationExperiment Design (A/B Testing)Experiment Analysis & Readout
13
0
173 people solved
Sep 6, 2025
Confluent logo
Confluent
Medium
Software Engineer Locked

Design RSS Feed and Temporary Mail

This question evaluates skills in large-scale system design, covering API design, ingestion and normalization pipelines, caching and freshness trade-o...

System DesignSystem Design FundamentalsAPI Design
12
0
178 people solved
Jan 28, 2026
Atlassian logo
Atlassian
Medium
Machine Learning Engineer Locked

Compute inverse-depth weighted sum of a nested list

This question evaluates competency in working with nested data structures and depth-based aggregation, measuring the ability to reason about hierarchi...

Coding & Algorithms
8
0
78 people solved
Oct 11, 2025
Intuit logo
Intuit
Medium
Software EngineerSenior+

Explain LLMs, AI-native vs. conventional apps, daily AI use, and the dangers of AI

In the phone screen for a staff-level backend engineering role, roughly 20 to 25 minutes are set aside for a conversation about AI. It is not a coding...

Machine LearningLLM ApplicationsAI-Assisted Development
1
0
13 people solved
Dec 31, 2025
Google logo
Google
Medium
Software EngineerNew Grad

Return the Lexicographically Smallest Two-Sum Index Pair

Return the Lexicographically Smallest Two-Sum Index Pair Problem Implement twoSumSmallestPair(nums, target) -> pair. Return the lexicographically smal...

Coding & Algorithms
15
0
94 people solved
Dec 8, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Write SQL for percent and window changes

Use PostgreSQL. Assume today = 2025-09-01. You must use CTEs and multiple window functions. Schema and tiny samples are below. Schema: - exposures(uni...

Data Manipulation (SQL/Python)SQL
61
0
430 people solved
Oct 13, 2025
OneMain Financial logo
OneMain Financial
Medium
Data Scientist

Handle Missing Values and Outliers in Machine Learning

Handling Missing Values and Outliers in Machine Learning You are building classification and regression models on tabular business data with missing v...

Machine Learning
50
0
94 people solved
Jul 12, 2025
Shopify logo
Shopify
Medium
Product Manager

Shopify Product Pages: AI Tools That Help Small Merchants Convert More Shoppers

You are a product manager at Shopify. Many merchants on the platform are small businesses that run their own online stores. Describe how you would use...

Product Design & StrategyAI Product ManagementExperiment Design (A/B Testing)
1
0
14 people solved
Oct 2, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist

Infer posterior after losing pick

Conditional probability after observing a loss You have three cats in a jumping contest: - Cat 1 (most athletic) wins with probability p1 - Cat 2 (mid...

Statistics & MathProbability
12
0
131 people solved
Aug 11, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design an email spam detection system

Design an email spam detection system System Design: End-to-End Email Spam Detection Context Design an end-to-end system that detects and handles spam...

ML System DesignFeature EngineeringSupervised Learning
27
0
226 people solved
Aug 10, 2025
Instacart logo
Instacart
Hard
Analytics Engineer

Data model for a grocery delivery marketplace: fact tables, dimensions and grain

Design the analytics data model for a grocery delivery marketplace. Customers place orders for items sold by retail stores; shoppers pick the items in...

System DesignDimensional Modeling
0
0
8 people solved
Mar 27, 2026
Reevo logo
Reevo
Medium
Software Engineer

Maximize weighted sum with disjoint adjacent swaps

You are given an integer array arr of length n (0-indexed). Define the weighted sum as: S = Σ_{i=0..n-1} arr[i] * (i + 1). You may perform any number ...

Coding & Algorithms
6
0
66 people solved
Feb 2, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer Locked

Compress vertices into uniques and indices

This question evaluates a candidate's ability to perform duplicate detection and compression of sequences of fixed-length tuples, exercising skills in...

Coding & Algorithms
5
0
60 people solved
Feb 11, 2026
Google logo
Google
Hard
Software Engineer

Design A/B testing platform

Design an A/B Testing Platform (Architecture + Experiment Science) Context You are designing an A/B testing platform for a large-scale consumer web/mo...

Analytics & ExperimentationSystem Design FundamentalsExperiment Design (A/B Testing)
12
0
131 people solved
Sep 6, 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
12
1
83 people solved
Jan 3, 2026
Rbcroyalbank logo
Rbcroyalbank
Easy
Data EngineerIntern

Explain pandas and SQL basics

You are interviewing for a Data Engineer co-op/intern role. Answer the following short technical questions. Python / pandas: 1. What is the difference...

Data Manipulation (SQL/Python)SQLPandas & Python Data
11
0
82 people solved
Jan 14, 2026
Amazon logo
Amazon
Hard
Software Engineer

Find Affected Services After Shutdown

You are given a set of services and their dependency relationships. The input is a hash map where each key is a service name, and the value is a list ...

Coding & AlgorithmsGraphs
47
1
455 people solved
Jan 26, 2026
TikTok logo
TikTok
Hard
Data Scientist

Decide launch of downranking suspected bad sellers

Experiment Design: Downranking Suspected Bad Sellers in Search Context - You are designing a decision framework and online experiment to test penalizi...

Analytics & Experimentation
6
0
69 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Design weapon-selling ad detection from posts

This question evaluates a candidate's ability to design a production-scale multimodal ML system for detecting weapon-selling ads, testing competencies...

ML System DesignModel EvaluationSupervised Learning
17
0
136 people solved
Dec 15, 2025
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