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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
Google logo
GoogleBloombergAmazon

Also asked at Amazon, Microsoft, Meta, TCS

Easy
Software Engineer

Maximize the Children Satisfied by Cookies

Maximize the Children Satisfied by Cookies You have children with minimum acceptable cookie sizes g and cookies with sizes s. Child i is satisfied by ...

Coding & AlgorithmsGreedySorting
0
0
8 people solved
Amazon logo
AmazonGoogleBox
Easy
Software Engineer

Check Whether All Binary-Tree Nodes Carry One Value

Problem Return true if every node of the binary tree rooted at root has the same value, and false otherwise. `cpp class Solution { public: bool is...

Coding & AlgorithmsTrees
1
0
15 people solved
Plaid logo
Plaid
Medium
Machine Learning Engineer Locked

Design RAG Evaluation and Debugging

This question evaluates a candidate's ability to design evaluation and debugging frameworks for production RAG systems, testing practical ML engineeri...

ML System DesignRetrieval-Augmented GenerationLLM Evaluation
200
1
1563 people solved
Jun 19, 2026
StackAdapt logo
StackAdapt
Medium
Machine Learning Engineer Locked

Rebuild a Binary Tree From Preorder and Inorder Sequences, Returned in Level Order

Reconstruct a binary tree with distinct values from its preorder and inorder traversals and return it in level-order form with null markers. Tests how...

Coding & AlgorithmsTrees
7
0
61 people solved
Sep 9, 2026
Amazon logo
Amazon
Medium
Product Manager

Choose a north-star metric and guardrails for Amazon's Echo Dot smart speaker

You are a product manager for the Amazon Echo Dot, Amazon's compact, low-cost smart speaker built around the Alexa voice assistant. What metrics would...

Analytics & ExperimentationMetrics & KPIs
1
0
9 people solved
Aug 11, 2026
Remitly logo
Remitly
Easy
Software Engineer

Design an IP Address Filtering Service

Design an IP Address Filtering Service Design a service that decides whether network requests should be allowed or denied based on source or destinati...

System DesignApplication SecurityNetworking
19
0
162 people solved
Apr 14, 2026
Whatnot logo
Whatnot
Medium
Software Engineer

Design A WhatsApp-Style Messaging System

Design a messaging system similar to WhatsApp. Users should send one-to-one and group messages, receive messages in near real time, and recover messag...

System Design
17
0
125 people solved
May 8, 2026
Google logo
Google
Medium
Software EngineerNew Grad

Design Tic-Tac-Toe With K Players

Design and implement a Tic-Tac-Toe game engine. You are given: - k players, each with a unique player ID or mark. - An n x n board, initially empty. -...

Coding & Algorithms
25
0
173 people solved
Feb 12, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist Locked

Find the Success Probability of Bold Betting

Calculate the chance of reaching five tokens before ruin under a bold, state-dependent betting rule. The solution enumerates the transitions, sets abs...

Statistics & Math
4
0
37 people solved
Aug 16, 2026
Plaid logo
Plaid
Medium
Machine Learning Engineer

Find Banks From Identifier Mappings

Plaid receives institution metadata from multiple sources. You are given two mappings: 1. code_to_institution: a one-to-one mapping from a bank code t...

Coding & Algorithms
12
0
177 people solved
Apr 30, 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
Palantir logo
PalantirAmplitudeAtlassian

Also asked at Atlassian, Amazon, Google, Microsoft, Uber, Salesforce, IXL Learning, WeRide

Medium
Software EngineerSenior+

Simulate a Growing Snake on a Grid and Report the Score After Every Move

A snake moves on a rectangular board with height rows and width columns. Cells are written (row, col), with (0, 0) in the top-left corner. The snake s...

Coding & AlgorithmsSimulation & State MachinesStacks & Queues
2
0
42 people solved
Stripe logo
Stripe
Medium
Product Manager

Payments ledger design: recording money movement, balances and reconciliation

Design the ledger for a payment processing system. The ledger is the system of record for money: every time funds move through the processor, for exam...

System DesignPayments & LedgersDistributed Transactions & Idempotency
3
0
48 people solved
Feb 13, 2026
Retell AI logo
Retell AI
Medium
Software Engineer Locked

Design a Smooth Per-Customer Calls-Per-Second Controller

Design a service that smoothly paces outbound calls under a separate rate limit for each customer. Candidates must address durable admission, priority...

System Design
12
0
118 people solved
Jul 27, 2026
Google logo
GoogleAmazonMeta

Also asked at Meta, Bloomberg, Microsoft, Apple, Goldman Sachs, Palo Alto Networks

Easy
Software Engineer

Find Whether a Complete Root Path Has a Target Sum

Problem Decide whether a binary tree contains a root-to-leaf path whose values add up to targetSum. Return a Boolean. The path must start at the root ...

Coding & AlgorithmsTrees
2
0
16 people solved
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Design Faceted Product Search at Large Scale

Design large-scale product search with free-text relevance, price and taxonomy filters, facet counts, and deterministic pagination. Explain index stru...

System Design
9
0
166 people solved
Aug 22, 2026
Goldman Sachs logo
Goldman SachsGoogleMeta

Also asked at Meta, Amazon, Microsoft, Bloomberg, Oracle, Snapchat

Medium
Software Engineer

Format Exact Fractions with Parenthesized Repeating Digits

Problem Return the decimal representation of numerator/denominator as a string. Enclose a repeating fractional part in parentheses. If the fraction ha...

Coding & AlgorithmsMath & Number Theory
1
0
16 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
Reddit logo
Reddit
Hard
Data ScientistSenior+ Locked

Estimate Incremental Search-Ad Revenue Without an A/B Test

Practice estimating incremental search-ad revenue when 100 eligible users are randomly assigned to treatment outside a conventional A/B platform. Defi...

Analytics & ExperimentationExperiment Analysis & ReadoutBusiness Case Analysis
26
0
176 people solved
Jun 24, 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
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