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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Netflix logo
Netflix
Medium
Software Engineer Locked

Compute minimum semesters to finish courses

This question evaluates graph theory and scheduling competencies, including dependency resolution, cycle detection in directed graphs, and capacity-co...

Coding & AlgorithmsGraphs
16
0
255 people solved
Feb 4, 2026
DoorDash logo
DoorDash
Hard
Software Engineer

Design a scalable food news feed

Question Design a news-feed feature for a food discovery app (DoorDash-style). The feed lists items showing title, author, short summary, and engageme...

System DesignSearch & Feed SystemsCaching
16
0
145 people solved
Sep 6, 2025
Vanta logo
Vanta
Medium
Software Engineer

Design test-run logging and query functions

Question Implement log(test_id, timestamp, status) to record a test run, where timestamps are strictly increasing across all test IDs. Implement get_m...

Coding & AlgorithmsData Structure Design
35
0
296 people solved
Aug 4, 2025
Reddit logo
Reddit
Medium
Data ScientistSenior+

Compute P(A>B) for m- and n-sided dice

Two fair dice are rolled independently: - Die A has m faces labeled \(1,2,\dots,m\). - Die B has n faces labeled \(1,2,\dots,n\). Each face is equally...

Statistics & MathProbability
9
0
150 people solved
Sep 19, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design a fraud detection system

Design a Real-Time Payment Fraud Detection System Design an ML-powered system that scores each online card-not-present (CNP) payment during authorizat...

ML System DesignAnnotation & Label QualityML Data Pipelines & Feature Stores
21
0
178 people solved
Aug 10, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Dive Deep to Find the Root Cause of a Problem

Describe a technical investigation in which the first plausible explanation was incomplete or wrong. Trace the symptoms, competing hypotheses, evidenc...

Behavioral & Leadership
0
0
14 people solved
Jul 31, 2026
DoorDash logo
DoorDash
Easy
Data ScientistSenior+ Locked

Find Monthly Top Customers Excluding High-Frequency Users

A PostgreSQL interview problem about ranking monthly customers while excluding users who meet a high-frequency threshold. Candidates must build the el...

Data Manipulation (SQL/Python)SQL
5
0
60 people solved
Jul 27, 2026
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Build harmful-content text classifier

This question evaluates a candidate's competence in designing an end-to-end machine learning pipeline for binary text classification, covering data un...

Machine Learning
9
0
67 people solved
Nov 28, 2025
Warner Bros Discovery logo
Warner Bros Discovery
Medium
Software Engineer

Implement array rotations and CSV keyword search

Problem A — Rotate an array left/right by k You are given an integer array nums of length n and an integer k. 1. Implement rotateLeft(nums, k) that re...

Coding & AlgorithmsArrays & StringsParsing & Interpreters
9
0
122 people solved
Nov 15, 2025
Fanatics logo
Fanatics
Medium
Software Engineer

Clarify employment type at Microsoft

Behavioral Question: Contractor vs Full‑Time Experience at Microsoft Context You are in a Software Engineer onsite behavioral round. The interviewer w...

Behavioral & LeadershipOwnership & ExecutionProject Deep Dive
11
0
146 people solved
Sep 6, 2025
Stripe logo
Stripe
Easy
Software Engineer

Explain your tech stack choices

Describe Your Primary Tech Stack, Rationale, and Scale Context: In a software-engineering HR screen, briefly summarize your core technology stack and ...

Behavioral & Leadership
8
0
77 people solved
Aug 14, 2025
Databricks logo
Databricks
Medium
Software Engineer

Design an IP filter using CIDR rules

Explain CIDR notation with a couple of concrete examples. Show how to convert a prefix like 192.168.0.0/16 into an inclusive 32-bit integer range and ...

Coding & AlgorithmsData Structure DesignNetworking
53
0
394 people solved
Jul 31, 2025
ByteDance logo
ByteDance
Medium
Data Scientist Locked

Choose Ranking Functions, Customer Value Metrics, and Predictive Models

A machine-learning and analytics fundamentals interview covering SQL ranking functions, defensible high-value-customer definitions, and model selectio...

Machine LearningSQLMetrics & KPIs
7
0
110 people solved
Aug 3, 2026
NVIDIA logo
NVIDIA
Hard
Software Engineer

Design signals across power and clock domains

Question In a SoC with two power domains A and B, design the interface for a control signal signal_1 (a registered 1-bit control such as an enable/sta...

System Design
28
0
208 people solved
Sep 6, 2025
LinkedIn logo
LinkedIn
Medium
DevOps EngineerSenior+ Locked

Explore an Unknown Grid and Return a Robot Path

Design a robot algorithm that explores an initially unknown finite grid and returns a shortest traversable path from the start to a known target, or r...

Software Engineering Fundamentals
4
0
33 people solved
Aug 1, 2026
Snapchat logo
Snapchat
Hard
Machine Learning Engineer

Implement calculator and graph connectivity

Answer the following coding problems: 1. Implement an arithmetic expression evaluator. Given a string containing non-negative integers, spaces, +, -, ...

Coding & Algorithms
9
0
73 people solved
Jan 30, 2026
Google logo
Google
Medium
Data Scientist

Reflect on a failed decision and redo it

Behavioral & Leadership (Data Scientist Onsite) Prompt: High-Stakes Decision That Turned Out Wrong Describe one specific decision you owned that mater...

Behavioral & Leadership
11
0
108 people solved
Oct 13, 2025
Morgan Stanley logo
Morgan Stanley
Hard
Data Scientist

Explain futures pricing and linear regression basics

You are interviewing for a quantitative/strats role. The interviewer asks a series of theoretical questions about derivatives pricing and linear regre...

Machine LearningRegression & Statistical ModelingTrading Systems
10
0
115 people solved
Oct 20, 2025
Apple logo
Apple
Medium
Machine Learning Engineer

Design CI/CD for AI Services

Design a CI/CD platform for a large AI product organization. The platform must support backend services, model-serving APIs, data and feature pipeline...

System DesignCI/CD & DeploymentContainers & Orchestration
11
0
146 people solved
Feb 13, 2026
Affirm logo
Affirm
Easy
Software Engineer Locked

Design a Ticketmaster-like ticketing system

This question evaluates system design and distributed-systems competencies for an online event ticketing platform, focusing on scalability, concurrenc...

System DesignSystem Design FundamentalsPayments & Ledgers
17
0
125 people solved
Nov 6, 2025
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