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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
Tekion logo
Tekion
Medium
Software EngineerSenior+ Locked

Count Open Lockers After 100 Rounds

Solve the 100-locker puzzle by connecting toggle rounds to divisors, explaining why perfect squares remain open and counting the final open lockers.

Statistics & MathMath & Number TheoryPuzzles & Brainteasers
3
0
26 people solved
Sep 10, 2026
Amazon logo
Amazon
Medium
Data Scientist

Analyze Top 10 Items' Revenue Contribution by Category

sales +----------+------------+---------+---------+------------+ | order_id | category | item_id | revenue | order_date | +----------+------------+-...

Data Manipulation (SQL/Python)
69
0
255 people solved
Aug 4, 2025
Atlassian logo
Atlassian
Medium
Machine Learning Engineer Locked

Design a scalable chatbot platform

This question evaluates a candidate's ability to design a scalable, production-grade chatbot platform that integrates ML-based inference, multi-turn c...

System Design
11
0
89 people solved
Jan 22, 2026
ByteDance logo
ByteDance
Hard
Data Scientist

Explain deployment, retrieval, and regularization

You are interviewing for a machine-learning role at a large-scale short-video platform. Answer the following conceptual questions. 1. Under tight GPU ...

Machine Learning
4
0
77 people solved
Jan 17, 2026
Palantir logo
Palantir
Easy
Software Engineer

Merge K Individually Sorted Integer Arrays Into One Sorted Array

You are given k arrays of integers, each sorted in non-decreasing order. Return a single array that contains every element of every input array, keepi...

Coding & AlgorithmsSortingTwo Pointers & Sliding Window
5
0
78 people solved
Oct 12, 2023
Meta logo
Meta
Medium
Product Manager

Using Meta's Apps and Social Reach to Tackle Climate Change

You are a product manager at Meta and have been asked to build a product that helps address climate change. Choose the part of the climate problem you...

Product Design & StrategyProduct SenseMetrics & KPIs
0
0
7 people solved
Jul 9, 2026
Meta logo
Meta
Hard
Data Scientist

Design Machine Learning Model for Facebook Groups Post Ranking

Design Machine Learning Model for Facebook Groups Post Ranking ML System Design: Ranking Facebook Groups Posts in News Feed Scenario You are designing...

Machine Learning
7
0
84 people solved
Aug 4, 2025
DoorDash logo
DoorDash
Medium
Software EngineerSenior+

Solve BFS grid delivery routing

You are given an m×n grid representing a city: 'S' are DashMart stores, 'H' are homes, '.' are roads, and '#' are obstacles. Movement is allowed in fo...

Coding & AlgorithmsGrids & MatricesStacks & Queues
15
0
131 people solved
Jul 31, 2025
Amazon logo
Amazon
Medium
Applied Scientist

Explain LLM architecture, tuning, evaluation

LLM Architecture, Positional Embeddings, Fine-Tuning (PEFT), Regularization, and Evaluation Context You are interviewing for a Machine Learning Engine...

Machine LearningTransformers & AttentionFine-Tuning & Alignment Techniques
10
0
117 people solved
Sep 6, 2025
DoorDash logo
DoorDash
Hard
Data Scientist

Evaluate Account-Partner Onboarding with Success Metrics

Evaluate Account-Partner Onboarding with Success Metrics Scenario DoorDash's account-partner team acquires new merchants onto the marketplace, and lea...

Analytics & ExperimentationCausal InferenceMetrics & KPIs
94
0
314 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Implement a generic tree Node class

Design and implement a Node class for a mutable rooted tree. Requirements: store value, parent, and ordered children; support add_child, remove, move_...

Coding & AlgorithmsTreesLow-Level Design (OOP)
16
0
111 people solved
Aug 14, 2025
Meta logo
Meta
Medium
Software Engineer

Optimize flight costs and find grid path

1) Given two integer arrays D and R of equal length n, where D[i] is the cost to depart on day i and R[j] is the cost to return on day j, choose indic...

Coding & AlgorithmsArrays & StringsGrids & Matrices
15
0
106 people solved
Sep 6, 2025
Apple logo
Apple
Medium
Frontend Engineer Locked

Explain JavaScript Scope, Closures, Timers, and the Event Loop

Explain JavaScript execution order through scope, closures, host APIs, the event loop, task queues, and microtasks. The interview also examines var ve...

Software Engineering Fundamentals
4
0
80 people solved
Jul 13, 2026
Google logo
Google
Medium
Software Engineer Locked

Choose optimal guesses for green-only Wordle

This question evaluates probabilistic reasoning, expected-value optimization, information partitioning, and algorithmic efficiency in selecting guesse...

Coding & AlgorithmsMath & Number TheoryProbability
15
1
180 people solved
Oct 14, 2025
eBay logo
eBay
Medium
Software Engineer Locked

Explain Redis/MySQL internals and containers vs VMs

This question evaluates understanding of backend system internals and operational tooling—specifically in-memory datastore architecture (Redis), relat...

Software Engineering FundamentalsDatabase InternalsContainers & Orchestration
10
0
83 people solved
Feb 12, 2026
Meta logo
Meta
Hard
Software EngineerNew Grad

Answer Repeated Range Aggregate Queries on a Static BST

Problem A fixed binary search tree has been converted once by an in-order traversal into the JSON-portable array sortedValues, which is sorted in nond...

Coding & Algorithms
2
0
32 people solved
Dec 21, 2025
Peakflo logo
Peakflo
Medium
Product Manager

AP Product Design: Auto-Reconciling POs, Receipts and Invoices and Routing Mismatches

Design a product that automates three-way matching in the procure-to-pay process. Before a vendor invoice is paid, it should be checked against the pu...

Product Design & StrategyProduct SenseRequirements & Launch Execution
0
0
5 people solved
Jan 15, 2026
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
10
0
96 people solved
Aug 14, 2025
Amazon logo
Amazon
Medium
Product Manager

Innovation, Root Cause, and Deadline Management Stories

Behavioral and Leadership Prompt: Innovation, Root Cause, and Deadline Management You are preparing for a Product Manager behavioral or leadership int...

Behavioral & LeadershipInnovation & SimplificationOwnership & Execution
18
0
86 people solved
Jul 4, 2025
Meta logo
Meta
Hard
Data Scientist

Design experiment for unconnected content in feed

Analytics & Experimentation Case: Socialness of Friends vs Unconnected Content Context You work on a personalized feed that shows posts from friends a...

Analytics & Experimentation
5
0
48 people solved
Oct 13, 2025
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