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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

Aggregate expenses by person, trip, and category

Problem You are given a list of expense records. Each record has: - employee_id (string) - trip_id (string) - category (string, e.g., MEAL, HOTEL, TRA...

Coding & AlgorithmsData Structure Design
30
0
454 people solved
Oct 17, 2025
Meta logo
Meta
Medium
Data Scientist

Compute multi-account activity and unread percentages in SQL

You are given two tables. Use them as the source of truth and do not assume any other data. Table: notifications +--------+------------+------------+-...

Data Manipulation (SQL/Python)
3
0
45 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Product Manager

Fitness Tracking App Data Model: Tables, Keys and Relationships

Lay out the database for a fitness app: the tables it needs, their keys, and how they relate to each other. `hint Start from one logged workout Pictur...

System DesignStorage & Sharding
1
0
10 people solved
Jan 10, 2026
Oracle logo
Oracle
Medium
Software Engineer Locked

Find Global and Rolling Top-K URLs Under a Memory Limit

Design memory-bounded global and trailing-24-hour top-K URL analytics over a massive access stream. The solution compares exact disk-backed counts wit...

System Design
2
0
38 people solved
Sep 5, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Fewest Link Clicks Between Two Wiki Pages, Then Scale the Search

On a wiki, every page links to other pages. Given a start page and a target page, find the fewest link clicks needed to get from the start to the targ...

Software Engineering FundamentalsGraphsCaching
1
0
17 people solved
Apr 28, 2026
Park+ logo
Park+
Medium
Product Manager

Market Sizing Case: Estimating Delhi's Installed Base of Television Sets

In a product manager interview, you are asked how many televisions there are in Delhi. Talk the interviewer through how you would reach a number. Stat...

Product / Decision MakingEstimation & Market Sizing
1
0
8 people solved
May 27, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Meta, Oracle, Microsoft, LinkedIn, Infosys, Flipkart, ByteDance, Uber

Hard
Software Engineer

Delete a Node From a Search Tree

Given the root of a binary search tree and an integer key, delete the node whose value equals key if it exists. Return the possibly new root while pre...

Coding & Algorithms
18
1
122 people solved
Bolt logo
Bolt
Medium
Product Manager

Ride-Hailing Fare Accuracy: Find the Causes of Overcharged Trips and Prioritize Fixes

You are a product manager at Bolt, a ride-hailing company. In ride-hailing, the price a rider pays is central to the experience. The final fare is cal...

Product Design & StrategyProduct Design & ImprovementPrioritization & Tradeoffs
0
0
10 people solved
Jan 23, 2026
xAI logo
xAI
Medium
Software Engineer Locked

Design a backend for an online checkers game

This question evaluates system design and backend engineering competencies, including authoritative game-state modeling, turn-based concurrency contro...

System DesignMultiplayer Game SystemsAPI Design
23
0
185 people solved
Feb 11, 2026
Google logo
Google
Medium
Software EngineerNew Grad

Explain Changing Priorities and Your Role on a Team

Explain Changing Priorities and Your Role on a Team Describe how you respond when project priorities change and how you characterize the role you usua...

Behavioral & Leadership
6
0
56 people solved
Dec 8, 2025
Amazon logo
Amazon
Hard
Software EngineerIntern Locked

Merge two sorted arrays in-place

This question evaluates array-manipulation and in-place algorithm skills, including understanding of sorted-data merging, index/pointer management, an...

Coding & AlgorithmsArrays & StringsSorting
10
0
137 people solved
Feb 8, 2026
OpenAI logo
OpenAI
Medium
Data Scientist Locked

Design plant-infection algorithms

This question evaluates algorithm design and simulation skills for a data scientist role, focusing on modeling contagion spread on an m-by-n grid, eve...

Coding & Algorithms
17
0
148 people solved
Feb 18, 2026
Citadel logo
Citadel
Medium
Software Engineer

Minimize changes for k-periodic palindrome

Question Given a string currentPassword (length N) and an integer k (1 ≤ k < N, N ≤ 2·10^5, lowercase letters, N divisible by k), find the minimum num...

Coding & AlgorithmsArrays & Strings
13
0
191 people solved
Aug 4, 2025
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Deshaw, Meta

Hard
Software Engineer

Minimize the Cost of Merging Exactly K Adjacent Piles at a Time

Problem Piles in stones remain in row order. Each move merges exactly k consecutive current piles into one and costs their combined stone count. Retur...

Coding & AlgorithmsDynamic Programming
0
0
7 people solved
Meta logo
Meta
Medium
Software EngineerSenior+

Design a Product Catalog Service for Promotion Write Surges and Image Integrity

In a product architecture round, design a catalog system. Businesses publish catalogs of products, each with a title, description, structured attribut...

System DesignSystem Design FundamentalsFile & Media Storage
2
0
14 people solved
Apr 1, 2026
Upstart logo
Upstart
Medium
Data Scientist

Solve core probability/statistics mini-problems

Answer the following probability/statistics interview questions. Assume all randomness is independent unless stated otherwise. 1) Radioactive decay (h...

Statistics & MathProbabilityPuzzles & Brainteasers
20
0
141 people solved
Nov 29, 2025
xAI logo
xAI
Medium
Software Engineer

Design a Rate Limiter with Per-User Token Quotas

Design a Rate Limiter with Per-User Token Quotas Design a distributed rate limiter for a high-traffic API platform, with one twist that drives the who...

System Design
9
0
92 people solved
Sep 23, 2025
PayPal logo
PayPal
Medium
Software Engineer

Find k most frequent in linear time

Given an integer array nums and an integer k (1 ≤ k ≤ number of distinct values in nums), return any k values that appear most frequently. Implement a...

Coding & AlgorithmsData Structure DesignArrays & Strings
12
0
138 people solved
Aug 13, 2025
Citadel logo
Citadel
Medium
Software Engineer

Optimize password transform and discount scheduling

Optimize password transform and discount scheduling Part 1 — Transform to palindromic k-periodic string: Input: a lowercase string currentPassword and...

Coding & AlgorithmsArrays & StringsIntervals & Scheduling
21
0
189 people solved
Aug 1, 2025
Coinbase logo
Coinbase
Medium
Software Engineer

Implement banking ops: transfer, top-k, cashback, merge

Design and implement an in-memory banking system that supports: ( 1) CreateAccount(id, initialBalance) and Transfer(fromId, toId, amount) with validat...

Coding & AlgorithmsLow-Level Design (OOP)Distributed Transactions & Idempotency
22
0
193 people solved
Sep 6, 2025
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