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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
Tubi logo
Tubi
Medium
Machine Learning Engineer

Implement K-Means and compare with GMM

Implement K-Means clustering from scratch for a dataset X of shape (n_samples, n_features) and a target number of clusters k. Your implementation shou...

Coding & Algorithms
7
1
117 people solved
Jan 28, 2026
NVIDIA logo
NVIDIA
Easy
Software Engineer

Design real-time fraud detection under 50ms

Design a real-time fraud detection system for a payments company that processes millions of transactions per day. Requirements: - For each incoming tr...

ML System DesignPayments & LedgersMLOps & Model Serving
18
0
128 people solved
Jan 15, 2026
Microsoft logo
Microsoft
Medium
Product Manager

Improve Microsoft PowerPoint: Pick a User, Find the Biggest Gap and Design a Fix

You are interviewing for a product manager role at Microsoft. The interviewer asks about your experience with PowerPoint and how you would make it bet...

Product Design & StrategyProduct Design & Improvement
0
0
6 people solved
May 30, 2026
Google logo
GoogleMicrosoftMeesho
Medium
Software Engineer

Count Distinct XOR Values from Index Triples

Problem You are given an array nums of length n that is a permutation of the integers 1 through n. For every index triple satisfying 0 <= i <= j <= k ...

Coding & AlgorithmsBit ManipulationMath & Number Theory
0
0
9 people solved
Startups.Com logo
Startups.Com
Medium
Machine Learning Engineer

Explain attention variants and their tradeoffs

You are asked to explain and reason about modern Transformer attention mechanisms. 1) Scaled dot-product attention - Define the operation mathematical...

Machine Learning
5
0
108 people solved
Mar 10, 2026
Bloomberg logo
Bloomberg
Medium
Software Engineer

Find the Lowest Common Ancestor of Two Nodes in an N-ary Tree

You are given a rooted tree in which every node may have any number of children (an N-ary tree). The nodes are labeled 0 to n - 1, node 0 is the root,...

Coding & AlgorithmsTrees
5
0
50 people solved
Jun 7, 2026
Meta logo
Meta
Hard
Machine Learning Engineer Locked

Machine Learning Fundamentals: Optimizers, Scaling Laws, and Clustering

This question evaluates conceptual grasp of core machine learning fundamentals: gradient-based optimizers, neural scaling laws, and unsupervised clust...

Machine LearningNeural Networks & TrainingUnsupervised Learning
19
0
250 people solved
Jun 27, 2026
Balyasny logo
Balyasny
Hard
Software Engineer Locked

Process Get and Set Operations in a Key-Value Cache

Process get and set operations in an in-memory key-value cache, with overwrite behavior, exact keys, and a defined missing-key result.

Coding & AlgorithmsData Structure DesignKey-Value Stores
3
3
38 people solved
May 25, 2026
Google logo
Google
Medium
Product Manager

Describe an AI Product You Took From Idea to Launch: Approach, Metrics and Lessons

Tell me about an AI product you built from zero to one. How did you approach building it, how did you define and measure success, and what did you lea...

Behavioral & LeadershipProject Deep DiveAI Product Management
1
0
8 people solved
Jul 14, 2026
Amazon logo
AmazonSalesforceMicrosoft

Also asked at Microsoft, Google, Bloomberg, Flipkart, Goldman Sachs, ByteDance, ServiceNow, PhonePe, Blinkit

Medium
Software Engineer

Measure Infection Time from One Valued Binary-Tree Node

Problem At minute zero, the unique node with value start in a binary tree becomes infected. Each subsequent minute, infection spreads simultaneously a...

Coding & AlgorithmsTreesGraphs
0
0
8 people solved
Expedia logo
Expedia
Hard
Software EngineerSenior+ Locked

Maximum Sum Skyline

This question tests algorithmic problem-solving with array optimization under a mountain (single-peak) shape constraint. It evaluates practical applic...

Coding & Algorithms
3
0
44 people solved
Jun 17, 2026
Lyft logo
Lyft
Medium
Software Engineer

Implement command-driven in-memory key-value database

Implement a command-driven in-memory key–value database. Supported commands (one per line): 1) SET key value 2) GET key → print value or NULL 3) DELET...

Coding & AlgorithmsData Structure Design
39
0
363 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Minimum Number of Rooms to Host Overlapping Meetings

You are given the schedule of n meetings for a single day. Meeting i occupies the half-open time interval [start_i, end_i): it starts at start_i and i...

Coding & AlgorithmsIntervals & Scheduling
0
0
12 people solved
Jun 16, 2026
Google logo
GoogleBloombergMicrosoftAmazon

Also asked at Microsoft, Amazon

Easy
Software Engineer

Count Distinct Three-Digit Even Numbers

Problem You are given an array digits containing decimal digits. Return the number of distinct three-digit even integers that can be formed from the a...

Coding & AlgorithmsMath & Number TheoryArrays & Strings
0
0
6 people solved
Amazon logo
Amazon
Medium
Software Engineer Locked

Deliver an Important Project Under a Tight Deadline

Describe deadline-driven project delivery through business priorities, scope and quality tradeoffs, dependency management, and evidence of the deliver...

Behavioral & LeadershipOwnership & ExecutionPrioritization & Tradeoffs
2
0
27 people solved
Sep 14, 2026
Sprinter Health logo
Sprinter Health
Medium
Software Engineer

Design a Game Store with Purchases, Downloads, and Reviews

Design an application or game store with several user-facing pages. Users must be able to browse all games by category, purchase a game and download i...

System DesignSystem Design FundamentalsAPI Design
4
0
38 people solved
May 10, 2026
Google logo
Google
Medium
Software Engineer

Proudest Project, Approach to Diversity and Sparking Colleagues' Creativity

A behavioral round for a software engineering role asked three questions: the project you are proudest of, how you approach diversity, and a hypotheti...

Behavioral & LeadershipProject Deep DiveInnovation & Simplification
1
0
10 people solved
Jul 24, 2026
Apple logo
Apple
Medium
Frontend Engineer Locked

Build an Accessible Recursive Expand-and-Collapse Tree in React

Implement an accessible recursive React tree whose expandable branches keep independent state as users toggle other nodes. The exercise covers stable ...

Software Engineering Fundamentals
6
0
71 people solved
Jul 13, 2026
Google logo
Google
Medium
Software Engineer

Googleyness Round: Resume Project Deep Dive, Teamwork and Handling Challenges

In a Googleyness and leadership round, the interviewer works from your resume and follows up on every answer. The round covers two things: 1. A deep d...

Behavioral & LeadershipProject Deep DiveConflict & Collaboration
0
0
7 people solved
Jul 20, 2026
Stripe logo
Stripe
Medium
Software Engineer Locked

Implement bitmap font render/compress/invert

This question evaluates proficiency in bitmap and matrix manipulation, lossless compression/decompression techniques, and modular code reuse for trans...

Coding & AlgorithmsGrids & Matrices
17
0
181 people solved
Feb 12, 2026
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