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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
Rippling logo
Rippling
Medium
Software Engineer Locked

Scale a rules engine for high traffic

This question evaluates understanding of scalable real-time system design, distributed architectures, consistency versus latency trade-offs, caching a...

System DesignSystem Design FundamentalsCaching
48
0
632 people solved
Feb 12, 2026
Roblox logo
Roblox
Medium
Machine Learning Engineer Locked

Design a game genre classifier

This question evaluates system design and machine learning competencies, including multi-modal modeling (text, images, tabular), data and label qualit...

ML System DesignFeature EngineeringMLOps & Model Serving
19
0
167 people solved
Feb 27, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer

Find all unique triplets summing to zero

Problem Given an integer array nums, return all unique triplets [nums[i], nums[j], nums[k]] such that: - i, j, and k are distinct indices (i != j != k...

Coding & Algorithms
9
0
88 people solved
Oct 23, 2025
Apple logo
Apple
Hard
Software Engineer

Design video platform and catalog system

System Design: Two Independent Systems You are asked to design two large-scale systems. For each system, provide: - Scope and key requirements - Exter...

System DesignFile & Media StorageSearch & Feed Systems
14
0
183 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Product Manager

Facebook Birthday Reminders: North-Star Metric, Funnel Metrics and Guardrails

You own birthday notifications at Facebook: the alerts that tell a person a friend's birthday is today and invite them to send a wish. Define how you ...

Analytics & ExperimentationMetrics & KPIs
1
0
13 people solved
Jul 27, 2026
Uber logo
Uber
Medium
Data ScientistNew Grad Locked

Evaluate Promotions for Uber Eats Users

This question evaluates a data scientist's causal inference and experimentation competencies—including randomized trial design, treatment-effect estim...

Machine LearningExperiment Design (A/B Testing)
75
0
571 people solved
Apr 30, 2026
Amazon logo
AmazonGoogleMeta

Also asked at Meta, Bloomberg, Microsoft

Medium
Software Engineer

Count Subarrays Whose Values Stay Within Two

Count Subarrays Whose Values Stay Within Two You are given a 0-indexed integer array nums. Call a subarray continuous if every pair of its elements di...

Coding & AlgorithmsTwo Pointers & Sliding WindowStacks & Queues
0
0
10 people solved
Coinbase logo
Coinbase
Medium
Data Scientist

Write SQL: sum values ≤ each row’s value

Given table numbers(id INT PRIMARY KEY, val INT), return for every row the sum of all val across the entire table that are ≤ that row’s val (i.e., com...

Data Manipulation (SQL/Python)SQLIndexing & Query Performance
11
1
99 people solved
Oct 13, 2025
Nuro logo
Nuro
Medium
Software Engineer Locked

Find Intersections Between Two Interval Lists

Find every non-empty intersection between two sorted lists of disjoint closed intervals. Preserve ascending order and correctly include intersections ...

Coding & Algorithms
5
0
42 people solved
May 26, 2026
Datadog logo
Datadog
Hard
Software Engineer

Design log-query stream processor

Design log-query stream processor Stream Processor: Query Registration and Log Tagging Context You are designing a streaming component that ingests a ...

System DesignString AlgorithmsData Structure Design
91
0
639 people solved
Jul 29, 2025
Google logo
Google
Medium
Software Engineer

Solve three coding interview problems

You are given three independent coding questions. 1) Decode an encoded string Given an encoded string s, decode it using the following rule: - Pattern...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
28
1
321 people solved
Oct 9, 2025
Legora logo
Legora
Medium
Backend Engineer Locked

Design a Cloud-Agnostic Upload Adapter

Design a provider-neutral upload library that hides cloud SDK differences without flattening every provider capability into one interface. Cover strea...

Software Engineering Fundamentals
6
0
71 people solved
Jun 22, 2026
Google logo
Google
Medium
Machine Learning Engineer

Design a Product or Video Recommendation System

Design a recommendation system for a large consumer platform. The platform may recommend either products in an e-commerce feed or videos in a media fe...

ML System DesignRecommendation SystemsRanking Models
33
1
230 people solved
Dec 24, 2025
Oracle logo
Oracle
Medium
Software Engineer

Compute letter frequencies from encoded string

Problem You are given an encoded string s representing a string of lowercase English letters (a–z). The encoding follows these rules: 1. Letters a to ...

Coding & AlgorithmsParsing & InterpretersArrays & Strings
8
1
146 people solved
Mar 1, 2026
Optiver logo
Optiver
Medium
Software Engineer

Maximum Currency Conversion Rate

Maximum Currency Conversion Rate You are given N currency exchange rate pairs. Each pair is a triple (from_currency, to_currency, rate), meaning that ...

Coding & Algorithms
18
0
173 people solved
Jan 31, 2025
Paradromics logo
Paradromics
Medium
Software Engineer

Design real-time modules communication and overload handling

You are designing a real-time system running on a single machine with two modules (e.g., producer -> consumer) that must communicate with low latency....

System Design
4
0
59 people solved
Feb 6, 2026
Jane Street logo
Jane Street
Medium
Quantitative Trader

Two Opaque Boxes: Place or Take for Maximum Expected Payoff

You are playing a one-player game with two opaque boxes, both of which start empty. The game lasts exactly 100 turns, and on every turn you must choos...

Coding & Algorithms
9
0
127 people solved
Aug 3, 2025
Asana logo
Asana
Medium
Software Engineer

Compute Products Excluding Each Index

You are given an integer array nums of length n. Return an array answer such that answer[i] equals the product of every element of nums except nums[i]...

Coding & Algorithms
8
0
59 people solved
Apr 2, 2026
Google logo
Google
Easy
Software Engineer Locked

LLM Foundations: Architecture, Adaptation, and Steering

This question evaluates a candidate's conceptual understanding of large language model architecture, adaptation, and inference-time control. It probes...

Machine LearningTransformers & AttentionFine-Tuning & Alignment Techniques
24
0
263 people solved
Jun 22, 2026
Meta logo
Meta
Medium
Data Scientist

Resolve Conflicts and Convince Skeptical Stakeholders Effectively

Resolve Conflicts and Convince Skeptical Stakeholders Effectively Scenario You are an IC-level data scientist (IC5-or-below) working on fast-paced, cr...

Behavioral & LeadershipConflict & CollaborationLeadership & Influence
77
0
379 people solved
Aug 4, 2025
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