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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
Snowflake logo
Snowflake
Medium
Software Engineer

Implement crawler and bracket validator

Implement two tasks: ( 1) Write a function crawl(start_urls, fetch, max_depth, domain_filter) that visits pages starting from the given seed URLs usin...

Coding & AlgorithmsGraphsStacks & Queues
18
0
208 people solved
Sep 6, 2025
Apple logo
Apple
Hard
Software Engineer Locked

Make tree iterators safe under concurrency

This question evaluates understanding of concurrent data structures, iterator safety, synchronization mechanisms, and reasoning about shared mutable s...

Software Engineering FundamentalsConcurrencyTrees
24
0
175 people solved
Feb 11, 2026
Google logo
Google
Hard
Data Scientist

Design a battery-life predictor and cold-start strategy

Smartphone Time-to-Empty (TTE) Prediction — Baseline, Features, Cold Start, Evaluation, and Monitoring Context You are building a per-device predictor...

Machine LearningML System DesignFeature Engineering
23
0
263 people solved
Oct 13, 2025
Point72 logo
Point72
Medium
Data Scientist

Determine Circle Intersection Status for Rendering Order

Scenario Graphics engine must evaluate multiple pairs of circles to decide rendering order based on intersection. Question Given an array where each e...

Coding & Algorithms
38
0
135 people solved
Jul 12, 2025
Thumbtack logo
Thumbtack
Medium
Data Scientist

Write complex joins and window functions

You are given a simplified Thumbtack-like marketplace schema in PostgreSQL. Assume UTC timestamps and weeks start on Monday. Treat "today" as 2025-09-...

Data Manipulation (SQL/Python)
2
0
30 people solved
Oct 13, 2025
Google logo
Google
Medium
Software Engineer

Implement zigzag level-order traversal

Given the root of a binary tree, return the node values in zigzag level order: visit nodes level by level, reading the first level from left to right,...

Coding & Algorithms
12
1
113 people solved
Aug 1, 2025
Akuna Capital logo
Akuna Capital
Hard
Software Engineer Locked

Choose Between Python, Java, and C++ for a Service

Choose among Python, Java, and C++ for an API-heavy automation service, a large high-throughput business service, and a latency-sensitive component, a...

Software Engineering Fundamentals
9
0
67 people solved
Aug 1, 2026
Ola logo
Ola
Medium
Product Manager

LinkedIn Creator Engagement: Segment Creators, Prioritize Bets and Pick Metrics

You are a product manager at LinkedIn. Leadership wants more engagement around the people who publish content on LinkedIn, from well-known industry vo...

Product Design & StrategyProduct Design & ImprovementMetrics & KPIs
1
0
9 people solved
Apr 1, 2026
Amazon logo
Amazon
Easy
Applied Scientist

Explain the bias–variance trade-off

Explain the bias–variance trade-off in supervised learning. In your answer, cover: - What bias and variance mean in the context of a prediction model....

Machine Learning
7
0
76 people solved
Dec 8, 2025
EliseAI logo
EliseAI
Medium
Software Engineer

Explain prompt engineering strategies for chatbots

Prompt Engineering for Reliable, Steerable, and Safe Chatbots Context You are designing a production-grade chatbot that must be reliable (consistent, ...

Machine LearningPrompt EngineeringLLM Applications
25
0
186 people solved
Sep 6, 2025
xAI logo
xAI
Medium
Software Engineer

Explain arrays and memory layout

What is an array? How is an array represented in memory (contiguous layout, element size and alignment, indexing arithmetic). Analyze time complexitie...

Coding & AlgorithmsArrays & StringsMemory Management
15
0
142 people solved
Aug 12, 2025
Google logo
Google
Medium
Product Manager

Apple Maps Product Sense Case: Pick a User Segment and Improve Its Experience

Imagine you are a product manager on Apple Maps. How would you make the experience better for the people who use it? `hint Narrow to one moment Apple ...

Product Design & StrategyProduct Design & Improvement
0
0
7 people solved
Jan 24, 2026
Applied Intuition logo
Applied Intuition
Medium
Software Engineer Locked

Build message schema parser with size/type queries

This question evaluates parsing of a simple message schema, construction of mappings from field names to primitive types and byte sizes, and computati...

Coding & Algorithms
8
0
72 people solved
Jan 6, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer

Reconstruct tree from inorder and postorder

Given two arrays representing the inorder and postorder traversals of a binary tree with unique values, reconstruct the original binary tree and retur...

Coding & Algorithms
13
0
98 people solved
Jul 29, 2025
Netflix logo
Netflix
Medium
Software EngineerSenior+ Locked

Design an ad frequency capping system

This question evaluates a candidate's ability to design scalable, low-latency distributed systems that enforce ad frequency caps across users, devices...

System DesignAds SystemsRate Limiting
14
0
241 people solved
Sep 30, 2025
Disney logo
Disney
Hard
Data ScientistSenior+

Demonstrate influential product leadership under ambiguity

Behavioral & Leadership: Influencing Without Authority Under Tight Deadlines Scenario You are a Senior Data Analyst supporting a streaming product. Fo...

Behavioral & Leadership
10
0
74 people solved
Oct 13, 2025
Figma logo
Figma
Medium
Data Scientist

Describe impact, prioritization, and stakeholder management

Describe impact, prioritization, and stakeholder management Behavioral interview (Hiring Manager) You are interviewing for a data/ML role. Answer the ...

Behavioral & LeadershipProject Deep DiveMetrics & KPIs
21
0
149 people solved
Jul 25, 2025
Figma logo
Figma
Medium
Data ScientistSenior+

Deliver a crisp self-introduction

90-Second Self-Introduction: Senior Data Scientist (Figma) Context You are preparing for an HR screen (behavioral/leadership) for a Senior Data Scient...

Behavioral & LeadershipMotivation & FitLeadership & Influence
9
0
137 people solved
Oct 13, 2025
Voleon logo
Voleon
Hard
Machine Learning EngineerSenior+

Compare Mixture-of-Experts and Dense Transformers

Compare Mixture-of-Experts and Dense Transformers Compare mixture-of-experts and dense Transformer models. Explain capacity, compute, routing, memory,...

Machine Learning
4
0
35 people solved
Jul 31, 2025
Apple logo
Apple
Medium
Machine Learning Engineer

Rotate a Matrix In Place

Given an n x n matrix of integers, rotate the matrix 90 degrees clockwise. Implement the function in Python. You may use a straightforward approach wi...

Coding & Algorithms
7
0
59 people solved
Nov 11, 2025
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