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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
Databricks logo
Databricks
Hard
Software Engineer

Path Between Two Nodes in a Preorder-Numbered Fibonacci Tree

A Fibonacci tree is a binary tree defined by its order: - The trees of order 0 and order 1 are each a single node. - For n >= 2, the tree of order n i...

Coding & AlgorithmsTrees
14
0
162 people solved
Oct 19, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Chat event aggregator: sliding-window message counts and active chats per user

Users can hold conversations in many separate chat sessions. A stream of events describes their activity, and you are asked to build an in-memory aggr...

Software Engineering FundamentalsData Structure DesignStacks & Queues
7
0
141 people solved
Oct 19, 2026
Databricks logo
Databricks
Hard
Software Engineer

Durable Event Writer: Concurrent Appends That Survive Crashes

Write pseudocode for a durable event writer. Many threads in one process call write(event) at the same time, and each call returns only when its event...

Software Engineering FundamentalsConcurrencyOperating Systems
7
0
151 people solved
Oct 19, 2026
Rippling logo
Rippling
Medium
Software EngineerSenior+

Delivery Driver Payroll Tracker With Accrued, Settled and Unpaid Wage Totals

Implement an in-memory payment tracker for delivery drivers, who are paid by the hour for the time they spend on deliveries. The class must support th...

Software Engineering FundamentalsData Structure DesignLow-Level Design (OOP)
111
3
824 people solved
Oct 10, 2026
Roblox logo
Roblox
Medium
Software Engineer

Rate Limiter with Separate Limits for Each Field of a Multi-Field Request

Implement a rate limiter, then extend it so that a request carrying several fields is rate-limited on each field separately. The report describes a 45...

Software Engineering FundamentalsRate LimitingData Structure Design
7
0
96 people solved
Oct 28, 2026
Affirm logo
Affirm
Easy
Software Engineer

Fix a Unique-Entity Counter, Then Flag Suspicious Events in an Event Stream

This exercise has two parts that share one background: a stream of events. First you debug an existing function that counts the unique entities in the...

Software Engineering FundamentalsDebuggingCode Quality & Maintainability
15
0
148 people solved
Oct 19, 2026
Palantir logo
Palantir
Medium
Software EngineerNew Grad

Implement a Load-Balanced Session Manager with Session Migration

Implement a session manager that assigns active sessions to a fixed set of servers. Each session adds a load of 1 to the server it is on, so a server'...

Software Engineering FundamentalsData Structure Design
22
0
227 people solved
Oct 13, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Design a Job Scheduler

Design a job scheduler. Explain how a submitted job becomes eligible to run, how work reaches an executor, and how the system records what happened wh...

System DesignJob Scheduling & WorkflowsDistributed Coordination
6
0
59 people solved
Nov 4, 2026
Affirm logo
Affirm
Medium
Software Engineer

Compute User Trust Scores from Activity Logs, Then Merge Each User's History

Given a log of user activity, compute a trust score for every user in it. The exercise has two coding parts followed by a discussion. First, compute t...

Software Engineering FundamentalsArrays & StringsBatch & Stream Processing
14
1
118 people solved
Oct 23, 2026
Waymo logo
Waymo
Easy
Software Engineer

Total Run Time of Ordered Tasks with a Per-Type Cooldown

A single worker runs a list of tasks in exactly the order given. Each task is labeled by its type, an uppercase letter, so the list is a string such a...

Coding & AlgorithmsSimulation & State MachinesArrays & Strings
6
0
79 people solved
Oct 30, 2026
Databricks logo
Databricks
Hard
Software Engineer

Design an Online Bookstore System

Design a bookstore system. The report gives only this one-word prompt, so settle the scope with the interviewer first. A common reading is an online b...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
7
0
134 people solved
Oct 19, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Explain Consistent Hashing with Routing Pseudocode

Explain consistent hashing and sketch pseudocode for routing a key to a server. Show how the routing rule behaves when the lookup reaches the end of t...

Software Engineering FundamentalsPartitioning & Consistent Hashing
8
0
56 people solved
Nov 4, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Code a poker game: model cards, rank five-card hands and pick the winners

Code a poker game. The report names this coding exercise only as "poker game", so settle the scope with the interviewer before writing code. In its us...

Software Engineering FundamentalsLow-Level Design (OOP)
16
0
136 people solved
Oct 18, 2026
Stripe logo
Stripe
Medium
Software Engineer

Render a GeoJSON Bike Ride with Markers and Alternating Paths via a Map API

You are given a local file, ride-simple.json, that holds a bicycle ride as GeoJSON, and a static map rendering service called staticmap. The service t...

Software Engineering FundamentalsAPI Integration & HTTP ClientsArrays & Strings
72
1
1342 people solved
Sep 24, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Microsoft, Meta, CME Group, TCS, Apple, IBM, OpenText, Infosys, Revolut, EPAM Systems, TikTok, Adobe, Oracle, Zoho, Wipro, USAA, Deloitte

Easy
Software Engineer

Find the Shared Starting String

Problem Given a nonempty array words of strings, return the longest string that occurs at the start of every array element. If the strings have no non...

Coding & AlgorithmsArrays & Strings
13
1
171 people solved
Rippling logo
Rippling
Medium
Software Engineer

Schedule Employee Field Changes with Effective Dates and History

Extend an HR application's employee Edit tab so a user can schedule future changes to manager, department, salary, and title. Persist them in the exis...

Software Engineering FundamentalsSystem Design FundamentalsDistributed Transactions & Idempotency
4
0
60 people solved
Nov 3, 2026
Netflix logo
Netflix
Medium
Software EngineerSenior+

Implement an in-memory key-value store with per-key TTL expiration and tests

In a phone screen, implement an in-memory key-value store in which every entry expires after its own time-to-live (TTL). Implement the usual operation...

Software Engineering FundamentalsData Structure DesignTesting & Quality
53
1
552 people solved
Oct 14, 2026
Rippling logo
Rippling
Medium
Software Engineer

Expense Policy Rules Engine: Scale, Violation Storage and Shared Compound Rules

Build an expense rules engine. Employees submit expenses, and the engine checks every expense against a company's expense policy rules and reports the...

Software Engineering FundamentalsLow-Level Design (OOP)Graphs
17
0
111 people solved
Oct 23, 2026
Stripe logo
Stripe
Medium
Software EngineerNew Grad

Debug a POST With a Stream Body That Hangs After a 307 Redirect in Python Requests

You are given a working copy of Requests, the widely used Python HTTP client library, into which a bug has been planted. One bug is reported for this ...

Software Engineering FundamentalsDebuggingAPI Integration & HTTP Clients
31
0
361 people solved
Oct 14, 2026
Sierra logo
Sierra
Medium
Software Engineer

Conversation Agent History: Paginated Fetching, Then Token-Limit Compaction

You are building the message-history layer of a conversation agent: the component that holds the conversation's messages and hands them to the languag...

Software Engineering FundamentalsAPI Integration & HTTP ClientsLLM Applications
53
0
406 people solved
Oct 6, 2026
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