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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
Anthropic logo
Anthropic
Medium
Software Engineer

Implement a Banking System

Design and implement an in-memory banking system. All operations are processed in non-decreasing timestamp order. Account identifiers are strings. Mon...

Coding & AlgorithmsData Structure DesignPayments & Ledgers
43
0
360 people solved
May 24, 2026
Amazon logo
Amazon
Medium
Applied ScientistSenior+ Locked

From Early NLP Embeddings to Modern LLM Embeddings

Review the evolution of NLP embeddings and learn how to compare smaller and larger modern embedding models using retrieval quality and operational cos...

Machine Learning
7
0
122 people solved
Aug 15, 2026
Glean logo
Glean
Medium
Frontend Engineer

Implement Two-Player Connect Four on a 6x7 Board with Win and Draw Detection

In the first technical round of a frontend engineer loop, the task was to implement Connect Four on a 6 x 7 board (6 rows, 7 columns) for two players....

Software Engineering FundamentalsSimulation & State MachinesReact & UI Frameworks
4
0
30 people solved
Sep 30, 2026
Amazon logo
Amazon
Medium
Software Engineer

Add One Source to Minimize Grid Inconvenience

Add One Source to Minimize Grid Inconvenience Implement min_max_inconvenience(grid). grid is a non-empty rectangular matrix containing 0 and 1. A cell...

Coding & AlgorithmsGrids & MatricesGraphs
21
0
256 people solved
Jul 9, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Improve classifier with noisy multi-annotator labels

Problem You are given a text dataset for a binary classification task (label in $\{0,1\\}$). Each example has been labeled by multiple human annotator...

Machine LearningAnnotation & Label QualityModel Evaluation
1034
3
6992 people solved
Feb 11, 2026
Viridien logo
Viridien
Medium
Data Scientist

Count fillings of a 3x3 grid where every 2x2 block holds 1 to 4

Each cell of a 3×3 grid is filled with one of the numbers 1, 2, 3 and 4. The grid contains four 2×2 blocks of adjacent cells: top-left, top-right, bot...

Statistics & MathPuzzles & BrainteasersMath & Number Theory
0
0
4 people solved
Nov 1, 2026
Ramp logo
Ramp
Medium
Software Engineer Locked

Design a Low-Latency Hotel Room Availability System

This Ramp system design question asks candidates to reason about low-latency room availability, correctness under concurrent booking demand, and pract...

System DesignSystem Design FundamentalsCaching
32
0
239 people solved
Jul 2, 2026
Mixpanel logo
Mixpanel
Medium
Data Scientist

Aggregate User Events and Check Join Uniqueness

Build a User Activity Summary from Event Data You have two tables. The intended user summary contains one row per user_id, and the users table provide...

Data Manipulation (SQL/Python)SQL
6
0
49 people solved
Sep 9, 2026
Databricks logo
Databricks
Medium
Software EngineerSenior+ Locked

Design an Online Book Seller Platform

Design a service for browsing and searching books, managing inventory, placing orders, taking payments, and tracking order state. Connect requirements...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
25
0
409 people solved
Jul 30, 2026
Palantir logo
Palantir
Easy
Software Engineer

Find Shortest Paths in Road Network

You are reviewing code for a road-network graph. The domain objects are: `java class Location { String name; Location(String name) { this.name...

Coding & Algorithms
42
0
357 people solved
Mar 8, 2026
Meta logo
Meta
Medium
Software Engineer

Design 24-Hour Ephemeral Stories for a Photo and Video Sharing App

Design the stories feature of a photo- and video-sharing app. Users post photos or short videos as stories that their followers can view for 24 hours,...

System DesignSearch & Feed SystemsCaching
6
0
55 people solved
Sep 14, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Calculate Completion Time for a Single-Server Reactor Queue

This Hudson River Trading coding question focuses on queue simulation for a single-server process with arrival times and task durations. It helps cand...

Coding & Algorithms
26
1
250 people solved
Jul 2, 2026
EPAM Systems logo
EPAM SystemsGoogle
Medium
Software Engineer

Rank Fixed-Width Numeric Suffixes with Original-Index Ties

Problem For each query[k, trim], keep only the rightmost trim digits of every string in nums, rank those equal-width numbers increasingly, and return ...

Coding & AlgorithmsSortingArrays & Strings
2
0
19 people solved
Optiver logo
Optiver
Medium
Software Engineer Locked

Design a Tiered Expiring Item Store

Design a tiered in-memory item store with deterministic placement, expiration, level-occupancy eligibility, and retrieval of the heaviest qualifying i...

Software Engineering FundamentalsData Structure DesignHeaps & Priority Queues
32
1
414 people solved
Aug 10, 2026
Meta logo
MetaGoogleMicrosoft

Also asked at Microsoft, Bloomberg, Amazon, Oracle

Medium
Software Engineer

Delete a Non-Tail Value through Its Supplied Node

Problem You receive only the node to delete from a singly linked list, not the head. The node is not the tail. Remove its value, reduce the list lengt...

Coding & AlgorithmsLinked Lists
1
0
16 people solved
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Extend an Existing Endpoint Cache and Prove It with Tests

Practice extending an existing endpoint cache while preserving the service's established abstraction and behavior. The answer emphasizes key isolation...

Software Engineering Fundamentals
6
0
70 people solved
Aug 16, 2026
Airbnb logo
Airbnb
Hard
Data Scientist

Design an A/B test with causal inference

A/B Test Design: Checkout Nudge (Guest-Level Randomization) You own experimentation for an e-commerce checkout flow. You're launching a checkout nudge...

Analytics & ExperimentationExperiment Design (A/B Testing)Causal Inference
153
1
2453 people solved
Oct 13, 2025
Visa logo
Visa
Medium
Software EngineerNew Grad

Solve Three Array Coding Problems

An online assessment contains the following three independent coding problems. For each problem, write a function that returns the requested value. Us...

Coding & AlgorithmsArrays & StringsDynamic Programming
21
0
264 people solved
Apr 5, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Design a Payment System That Charges Customers Through an External Payment Provider

Design a payment system that lets an online product charge its customers. Product services such as checkout and billing ask the payment system to coll...

System DesignPayments & LedgersDistributed Transactions & Idempotency
4
0
54 people solved
Sep 18, 2026
Schwab logo
Schwab
Easy
Java DeveloperSenior+ Locked

Review a Spring REST Controller for Correctness and Per-Request Waste

Review a Spring REST controller by tracing success and failure paths, HTTP semantics, validation, and service boundaries. The answer examines centrali...

Software Engineering Fundamentals
4
0
56 people solved
Sep 2, 2026
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