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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
Google logo
Google
Medium
Data Scientist Locked

Measure causal impact of YouTube ads

Estimate the incremental sales effect of a 6-week YouTube campaign, explain why regressing weekly sales on ad spend is biased, and design and size a g...

Analytics & ExperimentationCausal InferenceExperiment Design (A/B Testing)
23
0
170 people solved
Oct 13, 2025
Pinterest logo
Pinterest
Hard
Data Scientist

Recover causal effect without a control group

Post-hoc Causal Estimation After a Failed A/B Rollout Context An intern accidentally shipped a feature to 100% of eligible users for 5 consecutive day...

Analytics & ExperimentationCausal InferenceExperiment Analysis & Readout
22
0
141 people solved
Oct 13, 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
22
0
214 people solved
Aug 1, 2025
ByteDance logo
ByteDance
Medium
Software Engineer

Defend a Project's Schema, Indexes, and Concurrency Model

Defend a Project's Schema, Indexes, and Concurrency Model Choose one data-heavy service you have built and defend its data model under a detailed tech...

Software Engineering Fundamentals
3
0
30 people solved
Apr 26, 2026
Apple logo
Apple
Medium
Machine Learning Engineer

Solve stock and banana problems

Solve both coding problems below. 1. Maximum single-transaction stock profit: Given an array prices where prices[i] is the stock price on day i, retur...

Coding & Algorithms
7
0
85 people solved
Dec 17, 2025
Amazon logo
Amazon
Hard
Applied Scientist Locked

Explain NLP/RL concepts used in LLM agents

This question evaluates proficiency in transformer-based NLP, embedding methods, LLM agent architecture and evaluation, retrieval techniques for RAG, ...

Machine LearningAI AgentsRetrieval-Augmented Generation
26
0
242 people solved
Feb 9, 2026
Rippling logo
Rippling
Hard
Software Engineer Locked

Design several large-scale systems

This prompt evaluates expertise in large-scale system architecture and distributed systems, including competencies in API and storage design, scalabil...

System DesignSystem Design FundamentalsObservability
35
0
244 people solved
Feb 12, 2026
Microsoft logo
Microsoft
Medium
Product Manager

Cross-Team Conflict Resolution & Product Launch

Behavioral Prompt: Cross-Team Leadership, Conflict Resolution, and Course Correction In a Product Manager HR screen, share one cohesive example using ...

Behavioral & Leadership
18
0
79 people solved
Jul 4, 2025
Snapchat logo
Snapchat
Hard
Software Engineer

Count ways to decode digit string

You are given a string s consisting of digits '0' to '9'. The string encodes a message using the following mapping: - '1' → A, '2' → B, ..., '26' → Z....

Coding & AlgorithmsDynamic Programming
17
0
116 people solved
Dec 8, 2025
Google logo
Google
Medium
Software Engineer Locked

Find shortest relationship path using BFS

This question evaluates proficiency in graph representations and traversal algorithms—specifically BFS and adjacency-structure construction—for comput...

Coding & AlgorithmsGraphs
27
1
191 people solved
Feb 12, 2026
Peregrine logo
Peregrine
Medium
Software Engineer

Implement pagination and clump grouping

You are given two pre-implemented APIs: ( 1) fetch_activities(page: int) -> { total_pages: int, activities: [ { activity_id: string, type: string, use...

Data Manipulation (SQL/Python)
6
0
48 people solved
Aug 1, 2025
Capital One logo
Capital One
Medium
Data ScientistSenior+ Locked

Explain an ML Project from Model Development Through Deployment

Prepare a data science project walkthrough that connects the prediction target and validation design to an operational decision. Explain model selecti...

ML System Design
9
0
78 people solved
May 31, 2026
Workday logo
Workday
Medium
Software EngineerSenior+ Locked

Build a Fuzzy Keyword Index

This question evaluates string-processing, text-indexing, approximate string-matching, and data-structure design skills for supporting many repeated q...

Coding & Algorithms
2
0
49 people solved
Apr 1, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Design Slack-like messaging platform

Design a Slack-like team collaboration product. Core features: - Workspaces (tenants), users, and channels (public/private) - Direct messages (1:1 and...

System DesignReal-Time SystemsMessaging & Event-Driven
16
0
127 people solved
Oct 31, 2025
DoorDash logo
DoorDash
Hard
Machine Learning Engineer

Discuss ML infrastructure fundamentals

Discuss ML infrastructure fundamentals ML System Design: Infra Stack, Feature Store, Reproducibility, and Monitoring Context: You are designing and op...

ML System DesignML Data Pipelines & Feature StoresMLOps & Model Serving
24
0
182 people solved
Jul 29, 2025
Crusoe logo
Crusoe
Medium
Software Engineer Locked

Design a Slack-like messaging system

This question evaluates a candidate's ability to design scalable, highly available real-time messaging platforms, testing competencies in distributed ...

System DesignReal-Time SystemsMessaging & Event-Driven
17
0
136 people solved
Feb 12, 2026
Instacart logo
Instacart
Medium
Software Engineer

Evaluate arithmetic expression with precedence

Question Implement an evaluator for a string arithmetic expression. The input contains non-negative integers, the operators +, -, `, /, parentheses ( ...

Coding & AlgorithmsParsing & InterpretersStacks & Queues
13
0
123 people solved
Aug 1, 2025
Stripe logo
Stripe
Medium
Data Scientist

Compute power and interpret uplift metrics

A/B Test on Conversion: Powering, Inference, CUPED, Multiple Testing, and Clustering You are running a two-arm A/B experiment on a binary conversion o...

Statistics & Math
4
0
56 people solved
Oct 13, 2025
Anthropic logo
Anthropic
Medium
Software Engineer

Describe a Python design-and-coding approach in Colab

Python Coding-and-Design Exercise in Google Colab You are given an open-ended coding-and-design exercise to complete in Python, and the interviewer re...

System DesignCode Quality & MaintainabilityTesting & Quality
43
0
474 people solved
Sep 6, 2025
Applied Intuition logo
Applied Intuition
Medium
Software Engineer

Design a coupon pricing engine

Design and implement a coupon application engine for a shopping cart. Each Item has id, category, and unitPrice. A Coupon has: applicableCategories (o...

Coding & AlgorithmsLow-Level Design (OOP)
14
1
190 people solved
Sep 6, 2025
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