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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
Epic Systems logo
Epic Systems
Medium
Software Engineer Locked

Solve Coin, Growth, Time, and Rate Problems

Work through coin, daily growth, clock, pizza, and corridor puzzles with explicit assumptions, dimensional reasoning, and checks of each calculated an...

Statistics & MathMath & Number TheoryPuzzles & Brainteasers
3
0
26 people solved
Aug 30, 2026
Coupang logo
Coupang
Medium
Software Engineer

Compute minimal flips connecting two islands

Given an n x n binary grid of 0s (water) and 1s (land) containing exactly two disjoint islands (cells with 1 connected 4-directionally), return the mi...

Coding & AlgorithmsGrids & Matrices
18
0
158 people solved
Sep 6, 2025
Anthropic logo
Anthropic
Medium
Machine Learning Engineer Locked

Explain multithreading vs multiprocessing

This question evaluates understanding of concurrency and parallelism, specifically multithreading versus multiprocessing, their interaction with multi...

Software Engineering FundamentalsConcurrencyOperating Systems
60
0
447 people solved
Feb 11, 2026
Discord logo
Discord
Medium
Software Engineer

Implement an asyncio-based chat server

Async Chat Server (Python asyncio) Build a TCP chat server using Python's asyncio. The server listens on a given port and serves many concurrent clien...

Coding & AlgorithmsConcurrency
74
0
496 people solved
Oct 25, 2025
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Design a harmful video content moderation system

Question Design an end-to-end system to detect and moderate harmful videos on a large platform. Requirements - Detect multiple policy categories (viol...

ML System Design
13
0
252 people solved
Dec 15, 2025
Uber logo
Uber
Medium
Data ScientistNew Grad

Describe ownership and failure

Answer the following behavioral questions in a structured way, using specific examples from your past work or research: 1. Tell me about a time you we...

Behavioral & LeadershipOwnership & ExecutionFailure & Learning
15
0
127 people solved
Mar 22, 2026
Meta logo
Meta
Easy
Data Scientist

How would you define and use retention metrics?

Scenario You are a Data Scientist supporting a consumer product (app or website). A PM asks you to “dive deep” on user retention and recommends tracki...

Analytics & ExperimentationSegmentation & Cohort AnalysisMetrics & KPIs
15
0
202 people solved
Feb 18, 2026
Airbnb logo
Airbnb
Medium
Data Scientist

Build panel in SQL; run causal regression

Assume today is 2025-09-01 (UTC). Schema and small samples: users(user_id INT, country STRING, signup_date DATE, platform STRING) Sample: user_id | co...

Data Manipulation (SQL/Python)Causal InferenceSQL
8
0
153 people solved
Oct 13, 2025
Hadrian logo
Hadrian
Hard
Software Engineer Locked

Design a Rule-Driven Process Graph Validator

Design a directed process-graph validator around explicitly supplied ordering and presence rules without treating preserved examples as the complete c...

Software Engineering Fundamentals
2
0
28 people solved
May 17, 2026
Google logo
Google
Hard
Machine Learning Engineer

Can you reach target with distance-threshold edges?

You are given a set of unordered 2D points points[], a start point and an end point (both are included in points), and a function: `text getDistance(p...

Coding & AlgorithmsGraphs
19
2
290 people solved
Feb 22, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Compute cart total with best promotion

Assume you are implementing a checkout price calculator for an online shopping cart. You are given: - A list of items in the cart. Each item has: - ...

Coding & Algorithms
48
0
458 people solved
Dec 8, 2025
Apple logo
Apple
Medium
Software Engineer Locked

Design a Population-Weighted Random Country Picker

Design an immutable weighted random country picker whose selection probability is proportional to population. Precompute cumulative integer weights, d...

Software Engineering FundamentalsMath & Number Theory
9
0
117 people solved
Jul 2, 2026
xAI logo
xAI
Hard
Machine Learning Engineer

Implement a trie-based tokenizer

Design and Implement a Trie-Based Subword Tokenizer for LLM Pretraining Context You are building a subword tokenizer for a large-scale LLM pretraining...

ML System DesignTransformers & Attention
60
1
469 people solved
Sep 6, 2025
Google logo
Google
Hard
Machine Learning Engineer

Explain transformer architecture and variants

Technical Screen: Explain the Transformer Architecture Scope Provide a structured deep-dive into Transformers. Your explanation should cover theory, s...

Machine LearningTransformers & AttentionNeural Networks & Training
36
0
252 people solved
Sep 6, 2025
Google logo
Google
Medium
Software Engineer

Find fair split of a two-color necklace

Given a circular necklace represented by a string s over {'a','b'}, you may cut the necklace at most twice (yielding three contiguous pieces). Can you...

Coding & AlgorithmsArrays & Strings
24
3
309 people solved
Sep 6, 2025
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Design an O(1) eviction cache

Implement an in-memory key–value cache with fixed capacity that evicts the least recently used entry when full. Support get(key) -> value or -1 if mis...

Coding & Algorithms
4
0
72 people solved
Sep 6, 2025
TikTok logo
TikTok
Easy
Data Scientist

Find top-paid employee per department

Tables Assume the company stores employee compensation by department assignment. employee_dept_salary - employee_id INT - employee_name VARCHAR - depa...

Data Manipulation (SQL/Python)SQL
10
1
144 people solved
Nov 8, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Order Courses by Prerequisites, Returning the Smallest Valid Order

There are num_courses courses, numbered 0 to num_courses - 1. Some courses must be completed before others: each pair [a, b] in prerequisites means co...

Coding & AlgorithmsGraphsHeaps & Priority Queues
1
1
17 people solved
Apr 2, 2026
Uber logo
Uber
Medium
Product Manager

Plan Netflix's First Advertising Offering: Packaging, Ad Experience and Rollout

You are a product manager at Netflix and you own the launch of the company's first-ever advertising offering. How would you approach it? `hint Follow ...

Product Design & StrategyGrowth & MonetizationBusiness Case Analysis
1
0
8 people solved
Jan 19, 2026
Microsoft logo
Microsoft
Hard
Software EngineerSenior+

Explain OOP design and API rollout

In one interview round, the discussion focused on practical backend engineering rather than pure algorithms. Discuss both of the following: 1. You are...

Software Engineering FundamentalsLow-Level Design (OOP)API Design
10
0
148 people solved
Apr 7, 2026
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