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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Permitflow logo
Permitflow
Medium
Software Engineer Locked

Distinguish Permit Requirement Outcomes

This question evaluates software design and implementation skills, focusing on domain modeling of a tri-state permit status, condition matching via se...

Coding & Algorithms
5
0
56 people solved
Apr 8, 2026
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Design a Scheduler and Metrics Platform

Design a cloud-native job scheduling and metrics monitoring platform for a Kubernetes-like environment. The platform should allow internal users to su...

System Design
7
0
68 people solved
Feb 20, 2026
Optiver logo
Optiver
Medium
Quantitative Trader

Answer English HR classics

Answer English HR classics Behavioral Interview: Data Scientist (Technical Screen) Context: You are interviewing for a Data Scientist role at Optiver ...

Behavioral & LeadershipMotivation & FitAmbiguity & Decision Making
15
0
191 people solved
Aug 7, 2025
Datadog logo
Datadog
Medium
Software Engineer

Compute sliding window sums by tag

Question Given a list of datapoints where each datapoint has tags, a timestamp, and a value, write a function that, for a specified tag t and window s...

Coding & Algorithms
12
0
86 people solved
Jul 29, 2025
Okta logo
Okta
Medium
Frontend EngineerSenior+ Locked

Design High-Throughput Messaging Infrastructure

This question evaluates understanding of high-throughput messaging infrastructure, including database optimization strategies, message queue architect...

System Design
7
0
89 people solved
May 15, 2026
Jump Trading logo
Jump Trading
Medium
Software Engineer Locked

Identify read-only files from permission records

This question evaluates proficiency in parsing and filtering structured data by interpreting Unix-like permission strings and extracting filenames bas...

Coding & AlgorithmsArrays & Strings
10
0
121 people solved
Feb 12, 2026
Otter.Ai logo
Otter.Ai
Medium
Software EngineerSenior+

Design a Google Docs-Style Real-Time Collaborative Editing Backend

Design the backend of a collaborative document editor like Google Docs. Several users can open the same document at once and edit it in real time. Eac...

System DesignReal-Time SystemsConsistency & Availability
0
0
7 people solved
Aug 4, 2026
Chariot logo
Chariot
Medium
Software Engineer

Explore an HTTP Maze

You are given an HTTP API that represents a maze-like forest. The entrance is available at GET /mirkwood. Each location in the forest is identified by...

Coding & Algorithms
7
0
88 people solved
Apr 7, 2026
Shopify logo
Shopify
Medium
Machine Learning Engineer Locked

Design hierarchical product classification

This question evaluates a candidate's ability to design end-to-end machine learning systems for hierarchical product classification, covering competen...

ML System DesignSupervised LearningAnnotation & Label Quality
10
0
180 people solved
Mar 1, 2026
StubHub logo
StubHub
Medium
Software Engineer Locked

Design a Marketing Email System

This question evaluates system design and engineering competencies for building a scalable, reliable marketing email platform, covering scheduling, ti...

System DesignJob Scheduling & WorkflowsExperiment Design (A/B Testing)
7
0
108 people solved
Mar 29, 2026
eBay logo
eBay
Medium
Software Engineer Locked

Design a Streaming Top-Ten Sales Dashboard

Design a streaming dashboard for the top ten items and categories by units sold, including partitioned aggregation, global merging, duplicate correcti...

System Design
1
0
25 people solved
Aug 5, 2026
Two Sigma logo
Two Sigma
Hard
Data Scientist Locked

Predict Bike Dock Demand

This question evaluates a data scientist's competency in time-series demand forecasting, covering temporal target definition, temporal feature enginee...

Machine LearningTime Series & ForecastingFeature Engineering
32
1
233 people solved
Mar 18, 2026
Voleon logo
Voleon
Medium
Software Engineer

Design circular sliding-window ratio tracker

You are given a circular binary array A of length n (A[i] ∈ {0,1}) and a fixed window size w (1 ≤ w ≤ n). Define r (i) as the fraction of 1s within th...

Coding & AlgorithmsData Structure DesignTwo Pointers & Sliding Window
27
0
374 people solved
Sep 6, 2025
Meta logo
Meta
Hard
Software Engineer

Design and Evaluate a Solver for a 36-Card Sum-Fifteen Game

Design a solver and evaluation plan for a card-removal game. The deck contains 36 cards whose values are between 1 and 9. Each move selects three avai...

Software Engineering FundamentalsBacktracking & RecursionSimulation & State Machines
2
0
19 people solved
Sep 4, 2026
Applied Intuition logo
Applied Intuition
Easy
Software Engineer

Evaluate variables in simple arithmetic DSL

You are given a small DSL (domain-specific language) consisting of variable assignments, one per line. Each line has the form: `text <identifier> = <e...

Coding & Algorithms
10
0
82 people solved
Dec 1, 2025
Axon logo
Axon
Medium
Software Engineer

How did you handle an ethical issue?

Describe a time when you encountered an ethical issue at work. What was the situation, why was it ethically sensitive, what options did you consider, ...

Behavioral & LeadershipEthics & Responsibility
25
0
190 people solved
Mar 16, 2026
Instacart logo
Instacart
Medium
Software Engineer

Decode an encoded string

Implement a decoder for an encoded string where repetition is expressed with a number followed by a bracketed substring. Rules: - A pattern k[substrin...

Coding & AlgorithmsStacks & Queues
22
0
259 people solved
Mar 4, 2026
Uber logo
Uber
Medium
Data Scientist

How to evaluate lowering ETA?

Uber wants to estimate the business value of reducing ETA, where ETA is the predicted time from when a rider requests a trip until the driver arrives ...

Analytics & ExperimentationMetrics & KPIsCausal Inference
20
0
137 people solved
Feb 1, 2026
Rippling logo
Rippling
Medium
Software Engineer Locked

Find bounding boxes of connected houses

This question evaluates grid traversal and connected-component identification skills, specifically handling ragged 2D arrays, 4-directional adjacency,...

Coding & AlgorithmsGrids & Matrices
42
0
288 people solved
Feb 11, 2026
Two Sigma logo
Two Sigma
Hard
Data ScientistIntern

Build a Housing Price Prediction Model from Historical Data

You are given a historical dataset of residential real-estate transactions — sale records with property attributes, location information, and sale dat...

Machine Learning
16
0
123 people solved
Nov 15, 2025
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