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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
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Design a Low-Latency Typeahead Service

Design a low-latency typeahead service that returns up to ten dynamically scored suggestions with deterministic tie-breaking, exact updates, sharding,...

System DesignSearch & Feed SystemsPartitioning & Consistent Hashing
10
0
185 people solved
Aug 11, 2026
Stripe logo
Stripe
Medium
Data Scientist

Write SQL to monitor weekly chargeback spikes

Write a single SQL query (PostgreSQL) to detect weekly chargeback spikes by country and industry. Week starts Monday (use date_trunc('week', ts) with ...

Data Manipulation (SQL/Python)
4
0
68 people solved
Oct 13, 2025
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer

Approach verbose data-structure design

For a data-structure design problem whose behavior is easy to understand but whose implementation is lengthy, describe your step-by-step approach: cla...

Coding & AlgorithmsData Structure Design
45
0
593 people solved
Sep 6, 2025
Google logo
Google
Medium
Software Engineer

Add two big integers from digit lists

You are given two non-empty singly linked lists (or arrays) representing two non-negative integers. The digits are stored in reverse order, and each n...

Coding & AlgorithmsLinked ListsMath & Number Theory
20
0
189 people solved
Nov 24, 2025
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Classify Tree Nodes in SQL

Classify each tree node as Root, Inner, or Leaf in PostgreSQL using its parent ID and whether it has children, returning one classification per node.

Data Manipulation (SQL/Python)SQLTrees
6
0
90 people solved
Sep 9, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Deep-Clone a Hand-Built Doubly Linked List with an Arbitrary Special Pointer

Implement a doubly linked list in which every node has four fields: - value: the node's value (assume an integer); - left: the previous node, or null ...

Software Engineering FundamentalsLinked Lists
1
0
17 people solved
Aug 4, 2026
Capital One logo
Capital One
Medium
Software EngineerSenior+

Place Pieces on a Grid

Given integers n and m, and an ordered list figures where each element is one of "A", "B", "C", "D", or "E", construct an n x m integer matrix grid. T...

Coding & AlgorithmsSimulation & State Machines
17
0
218 people solved
Feb 8, 2026
LinkedIn logo
LinkedInBloombergGoogle

Also asked at Google, Meta, Amazon, Microsoft, SAP

Medium
Software Engineer

Check Whether an Integer Is a Perfect Square

Perfect Square Check Given a positive integer n, determine whether it is a perfect square (i.e., there exists an integer x such that x*x = n). Require...

Coding & AlgorithmsBinary Search
15
2
202 people solved
Applied Intuition logo
Applied Intuition
Medium
Software Engineer Locked

Implement a single-thread task scheduler API

This question evaluates understanding of task scheduling, timing semantics, deterministic ordering, single-thread concurrency control, and data struct...

Coding & Algorithms
14
0
106 people solved
Feb 11, 2026
Glean logo
Glean
Medium
Product Manager

Walk through an AI agent you took from problem to production and how you evaluated it

In a product manager interview at Glean, you are asked whether you have taken an agentic AI system all the way from idea to something people actually ...

Behavioral & LeadershipAI Product ManagementProject Deep Dive
0
0
13 people solved
Jul 25, 2026
Apple logo
Apple
Medium
Product Manager

Apple Music Strategy to Grow Listening Habits and Loyalty Among Young Listeners

You are the product manager for Apple Music. How would you raise engagement and retention, with a particular focus on younger listeners? Explain which...

Product Design & StrategyGrowth & MonetizationMetrics & KPIs
1
0
14 people solved
Aug 13, 2026
eBay logo
eBay
Medium
Software EngineerSenior+

Solve Dependency, Prefix, and Cache Problems

Solve the following three coding problems. Problem 1: Determine Whether All Tasks Can Be Completed You are given numTasks, the number of tasks labeled...

Coding & Algorithms
9
0
83 people solved
Apr 8, 2026
Stripe logo
Stripe
Easy
Data Scientist

Match payments to invoices by memo or amount

Scenario You are building a small reconciliation tool that matches payments to invoices. Data structures Assume you are given: - invoices: a list of i...

Coding & AlgorithmsData Cleaning & WranglingArrays & Strings
35
0
249 people solved
Oct 25, 2025
Meta logo
Meta
Hard
Machine Learning Engineer Locked

Simulate Monster Team Battles

This question evaluates a candidate's ability to model stateful simulations and implement deterministic battle mechanics with clean data structures an...

Coding & Algorithms
4
0
58 people solved
May 19, 2026
Apple logo
Apple
Medium
Software Engineer

Defend a Distributed-System Architecture in a Deep Dive

Present a distributed-system project you led and explain its throughput bottlenecks, failure isolation, consistency under concurrency, and observabili...

Behavioral & LeadershipProject Deep DiveConsistency & Availability
1
0
11 people solved
Jul 25, 2026
MongoDB logo
MongoDB
Medium
Software Engineer Locked

Evaluate a Nested Predicate Expression Tree

Implement and explain evaluate(predicate, document) -> bool for a serialized predicate tree. Make the API or object boundaries explicit, then cover in...

Software Engineering Fundamentals
6
0
109 people solved
Jul 21, 2026
Two Sigma logo
Two Sigma
Hard
Data ScientistIntern Locked

Why use the t-statistic?

This question evaluates understanding of the t-statistic as a standardized test measure connecting effect size, variance, and sample size, and probes ...

Statistics & MathHypothesis TestingSampling & Estimation
20
0
175 people solved
Apr 2, 2026
Harvey logo
Harvey
Medium
Software Engineer

Implement a Hierarchical File System

Implement an in-memory hierarchical file system. Create a class FileSystem with the following methods: - FileSystem() initializes an empty file system...

Coding & Algorithms
6
1
123 people solved
Apr 12, 2026
Applied Intuition logo
Applied Intuition
Hard
Software Engineer

Implement Nested Transactional Key-Value Store

Implement an in-memory key-value store that processes a batch of commands, one command per line. The store must support nested transactions. Supported...

Coding & Algorithms
13
0
145 people solved
Apr 4, 2026
Google logo
GoogleAmazonTCS

Also asked at TCS, Robinhood, Box, Meta, Bloomberg, Microsoft, Adobe, Oracle, PayPal, Palo Alto Networks, Salesforce, Redfin

Medium
Software Engineer

Find top/bottom-k words in list or stream

You are given words (strings) either as a finite list or as an unbounded stream. 1) List version: Given an array words and an integer k, return: - the...

Coding & AlgorithmsHeaps & Priority QueuesBatch & Stream Processing
24
1
263 people solved
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