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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
Lyft logo
Lyft
Medium
Software Engineer

Design a Wiki Crawler That Keeps Every Stored Page at Most Five Days Stale

Design a system that crawls all of the content of a wiki, stores it, and keeps the stored copy up to date within a bounded time: the stored version of...

System DesignSystem Design FundamentalsJob Scheduling & Workflows
7
0
118 people solved
Sep 24, 2026
Waymo logo
Waymo
Medium
Data Scientist Locked

Welch's t-Test p-Value for a Routing Experiment on Time to Pickup, and Its Validity

Filter rides to one city and month, join users to their experiment variants, and compute a Welch's t-test p-value on time to pickup in Python. Then ju...

Analytics & ExperimentationHypothesis TestingExperiment Design (A/B Testing)
10
0
98 people solved
Sep 10, 2026
Visa logo
Visa
Medium
Software EngineerSenior+

Earliest K-Minute Meeting Start from Text Schedules with Inclusive Busy Times

Everyone listed in a set of schedules must attend one meeting of k minutes. Each schedule entry is a string with four space-separated fields, a person...

Coding & AlgorithmsIntervals & Scheduling
4
0
65 people solved
Oct 2, 2026
Cresta logo
Cresta
Medium
Software Engineer

Decode a Message of Letter-Scrambled Words Against a Known Word List

A message was encoded word by word: the letters inside each word were rearranged, while the order of the words and the single spaces between them were...

Coding & AlgorithmsArrays & Strings
7
0
70 people solved
Oct 6, 2026
Roblox logo
Roblox
Medium
Software Engineer

Find the Longest Safe Straight-Line Movement on a Laser Grid

A board has numRows rows and numColumns columns. A laser at (row, column) destroys every cell in its row and every cell in its column. A robot starts ...

Coding & AlgorithmsSimulation & State Machines
29
0
215 people solved
Jul 4, 2026
Glean logo
Glean
Medium
Software Engineer

Make k Cuts in a Row of Positive Values to Maximize the Smallest Piece Sum

You are given an array sweetness of positive integers describing consecutive chunks of a bar, and an integer k. Make exactly k cuts to split the bar i...

Coding & AlgorithmsBinary SearchGreedy
5
0
54 people solved
Sep 30, 2026
Spacex logo
Spacex
Easy
Software Engineer Locked

Align Telemetry Streams and Publish Versioned Corrections

Define telemetry subtraction semantics, handle missing or repeated timestamps, and reconcile late events with versioned, idempotent corrections.

Software Engineering FundamentalsBatch & Stream ProcessingDistributed Transactions & Idempotency
10
0
124 people solved
Sep 12, 2026
NVIDIA logo
NVIDIALyftAppleGoogle

Also asked at Apple, Google

Hard
Software Engineer

Read a Character Stream across Repeated Requests

Read a Character Stream across Repeated Requests A hidden file is available only through read4(buf4). Implement Solution.read(buf, n) to copy up to n ...

Coding & AlgorithmsData Structure DesignArrays & Strings
1
0
24 people solved
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Meta, Bloomberg, Infosys, Snowflake, UiPath, Apple, Oracle, Yandex, Paytm, Salesforce, TCS, LinkedIn, Lyft, Walmart Labs, NVIDIA

Medium
Software Engineer

Maintain Stack Values and Historical Prefix Minima

Problem Implement a stack that supports these original stateful methods, each in O(1) time: `cpp class MinStack { public: MinStack(); void pus...

Coding & AlgorithmsData Structure DesignStacks & Queues
4
0
33 people solved
Lyft logo
Lyft
Medium
Machine Learning EngineerIntern

Dynamic Pricing for a Ride-Hailing Marketplace: Supply-Demand Model, Algorithm, Metrics

Design a dynamic pricing system for a ride-hailing marketplace, in which riders request trips, drivers fulfil them, and the price of a trip can change...

ML System DesignCausal InferenceExperiment Design (A/B Testing)
0
0
7 people solved
Oct 26, 2026
Amazon logo
Amazon
Medium
Product Manager

Designing AI Features for Grocery Customers: Segment, Pain Points, Prioritized Roadmap

In a product manager interview, you are asked how you would apply AI to make grocery shopping better for customers. Propose your approach, decide what...

Product Design & StrategyAI Product ManagementMetrics & KPIs
3
0
31 people solved
Oct 17, 2026
Faire logo
Faire
Medium
Software Engineer

Peak number of bikes needed to cover all pre-booked rental intervals

A bike rental service receives every booking ahead of time. Each booking reserves one bike from a start time until an end time. Write a function that ...

Coding & AlgorithmsIntervals & Scheduling
4
0
43 people solved
Oct 7, 2026
Harvey logo
Harvey
Medium
Software Engineer Locked

Allocate Unique File Names in an In-Memory Vault

Allocate unique vault file names with the smallest available numeric suffix, handling preexisting suffixes, repeated requests, and case sensitivity.

Coding & AlgorithmsArrays & StringsData Structure Design
17
2
240 people solved
Sep 1, 2026
Glean logo
Glean
Medium
Data Scientist

Expectation and Variance of a Sum of Two Random Variables, Including Covariance

In a hiring-manager interview for a data scientist role, the statistics question was: how do you compute the expectation and the variance of the sum o...

Statistics & MathProbability
6
0
85 people solved
Sep 30, 2026
Apple logo
Apple
Medium
Data Scientist

Explore Employee and Session Audit Tables Before Analysis

Explore Employee and Session Audit Tables Before Analysis You are given an employee table with org, country, employeeid, and name, and an audit_events...

Data Manipulation (SQL/Python)Data Cleaning & WranglingData Quality & Validation
11
0
118 people solved
Sep 12, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Cloud IDE That Edits and Runs Code in Browser-Accessible Workspaces

Design a cloud IDE in which developers edit and run code and use a terminal in the browser while their files and execution environments live on remote...

System DesignSandboxing & IsolationContainers & Orchestration
20
0
146 people solved
Sep 21, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+

Design a Power-Loss-Safe Bootloader That Updates Application Firmware

Design a bootloader that can update the application firmware of an embedded device. The bootloader runs first on every reset and decides whether to st...

System DesignFault Tolerance & Failover
0
0
6 people solved
Oct 31, 2026
Meta logo
Meta
Medium
Software EngineerSenior+

Design a Follow-Based Social News Feed With Paginated Home Timelines

Design a news feed system for a social application. Users publish posts and follow other users; each user's home feed shows recent posts from the acco...

System DesignSearch & Feed SystemsCaching
1
0
9 people solved
Nov 1, 2026
Databricks logo
Databricks
Medium
Software Engineer

In-Memory Key-Value Store with a Per-Key 5-Minute Query Threshold

You are building an in-memory key-value store that also protects itself from hot keys. Besides storing and returning values, the store must enforce a ...

Software Engineering FundamentalsData Structure DesignRate Limiting
13
1
147 people solved
Sep 11, 2026
Apple logo
Apple
Medium
Software Engineer

Cloud Provider Design for Provisioning Resources Through Terraform

You work at a cloud provider, on a team that builds and operates infrastructure. Customers want to provision one of your resources with Terraform: dec...

System DesignAPI DesignCI/CD & Deployment
14
0
106 people solved
Sep 24, 2026
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