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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
Goldman Sachs logo
Goldman Sachs
Medium
Quantitative Researcher

Total Rainwater Trapped Above an Elevation Profile of Unit-Width Bars

An elevation profile is made of vertical bars of width 1 standing side by side on flat ground. After heavy rain, water collects in the dips between ba...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
3
0
28 people solved
Sep 25, 2026
Google logo
Google
Hard
Software Engineer Locked

Repeatedly Delete Leaves Matching a Target Value From a Binary Tree

Remove every binary-tree leaf whose value equals a target, repeating as parents turn into matching leaves, and return the possibly empty result in lev...

Coding & AlgorithmsTrees
44
0
411 people solved
Sep 16, 2026
Nubank logo
Nubank
Medium
Software Engineer

Design a Near-Real-Time Top-K Customers by Purchases in a Sliding 60-Minute Window

Design a system that maintains the top K customers ranked by how many purchases each made in the last 60 minutes. The window slides: a purchase stops ...

System DesignReal-Time SystemsBatch & Stream Processing
1
0
16 people solved
Sep 3, 2026
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Meta, Bloomberg, Cognizant, TCS

Easy
Software Engineer

Keep Every Person When Attaching Address Details

Problem Report firstName, lastName, city and state for every Person. Match addresses by personId; where no address matches, city and state must be NUL...

Data Manipulation (SQL/Python)SQL
1
0
13 people solved
Google logo
Google
Hard
Machine Learning Engineer Locked

Explain Pipeline Parallelism in GRPO Training

Understand how pipeline stages and microbatches interact with GRPO rollouts, relative advantages, policy versions, throughput, and staleness.

ML System Design
10
1
122 people solved
Aug 14, 2026
SIG (Susquehanna) logo
SIG (Susquehanna)AmazonIntuit

Also asked at Intuit, Adobe, Google, TikTok, Spotify, IXL Learning, Bloomberg, Microsoft, Apple, Deshaw, Meta, Citadel, Oracle, Uber, Anduril, Tinder, Walmart Labs, Goldman Sachs, PayPal, Flipkart

Medium
Data Scientist

Maintain the Median of an Integer Stream with Two Heaps

Support addNum(value), which adds an integer to a stream, and findMedian(), which returns the median of all values received so far. For an even count,...

Coding & AlgorithmsHeaps & Priority QueuesData Structure Design
2
0
20 people solved
Attentive logo
Attentive
Hard
Software Engineer Locked

Design a Kafka-Fed Event Analytics System for Long-Term Analysis

A system design exercise to build an event analytics system that ingests very high-volume, concurrent event streams from Kafka and stores them for lon...

System DesignMessaging & Event-DrivenData Ingestion & CDC
5
0
45 people solved
Sep 19, 2026
Visa logo
Visa
Medium
Software EngineerNew Grad Locked

Shortest Prefix of a Digit String That Can Build Every Permutation of a Target

Given a digit string and a list of digit targets, return for each target the length of the shortest prefix whose characters could build every permutat...

Coding & AlgorithmsArrays & Strings
12
0
90 people solved
Sep 19, 2026
Google logo
GoogleInfosysVisa

Also asked at Visa, Amazon, EPAM Systems, DoorDash, Meta, Microsoft, TikTok, Duolingo, Bloomberg, Adobe, Apple, Salesforce, Nutanix

Hard
Software Engineer

Find the Longest Strictly Increasing Cardinal Matrix Path

Problem Return the greatest number of cells in a strictly increasing matrix path. Moves are only up, down, left and right inside the matrix; no diagon...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices
1
0
18 people solved
Cohere logo
Cohere
Medium
Software Engineer

Design an Enterprise AI Research Agent With Internal and Web Retrieval and Citations

Design an enterprise-grade AI research agent, similar in spirit to Glean-style workplace search assistants. An employee asks a complex research questi...

System DesignSystem Design FundamentalsAI Agents
12
0
119 people solved
Sep 22, 2026
Apple logo
Apple
Hard
Software Engineer

Design a Distributed Log Pipeline That Counts Keywords Across a Fleet

After two short coding problems, the interviewer extended the discussion into a design question: many machines produce logs, and you need a distribute...

System DesignSystem Design FundamentalsBatch & Stream Processing
7
0
62 people solved
Aug 28, 2026
MongoDB logo
MongoDBAmazonMeta

Also asked at Meta, Google, Bloomberg, Oracle, Trend Micro, UnifyApps

Medium
Software Engineer

Schedule Dry Days to Prevent Any Lake Flood

Problem Lakes 1..1000000000 start empty. A positive rains[i] fills that lake; rain on an already full lake causes a flood. On a zero day,you must choo...

Coding & AlgorithmsGreedyIntervals & Scheduling
1
0
22 people solved
Ramp logo
Ramp
Hard
Software Engineer AI Locked

Implement and Defend an AI-Assisted Repository Change

Implement a feature in an unfamiliar repository with AI assistance while remaining able to explain and defend every change. Record prompts, respect re...

Software Engineering FundamentalsAI-Assisted DevelopmentTesting & Quality
38
0
397 people solved
May 25, 2026
Roblox logo
RobloxCapital OneTikTok

Also asked at TikTok, Hudson River Trading, Google, SIG (Susquehanna), Uber, Visa, Meta, PayPay, Microsoft, eBay

Hard
Software Engineer

Block Placement on a Number Line

Block Placement on a Number Line An initially empty number line starts at zero and extends indefinitely in the positive direction. Process queries in ...

Coding & AlgorithmsTreesIntervals & Scheduling
2
0
30 people solved
Spacex logo
Spacex
Easy
Software Engineer Locked

Explain What You Would Change When Rebuilding a Technical Project

Use a technical project retrospective to justify focused design changes, compare trade-offs, and validate improvements without unnecessary rewrites.

Behavioral & LeadershipProject Deep Dive
8
0
77 people solved
Sep 12, 2026
Generalmotors logo
Generalmotors
Medium
Software EngineerSenior+

Choose Between a Monolith, Microservices, and a Modular Architecture

Compare a monolithic service, microservices, and a modular architecture. Explain how you would migrate a monolith toward services and how you would re...

System DesignMicroservices & Service Architecture
2
0
42 people solved
Aug 30, 2026
Instacart logo
Instacart
Medium
Software Engineer

Implement Search and Filters, Then Diagnose a Query-Ordering Bug

Build search and filtering for an existing web application using a React client and a Python FastAPI backend. Start by eliciting the missing requireme...

Software Engineering FundamentalsDebuggingReact & UI Frameworks
3
0
66 people solved
Sep 7, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

AI Safety Views and Leadership-Principle Behavioral Questions

In a behavioral round with a hiring manager, you are asked about AI safety and then several standard behavioral questions of the kind associated with ...

Behavioral & LeadershipEthics & ResponsibilityOwnership & Execution
5
0
41 people solved
Sep 7, 2026
Amazon logo
AmazonGoogleMicrosoft

Also asked at Microsoft, Bloomberg, Meta, Uber, Rokt, TikTok, DoorDash, Snowflake, Squarepoint, Apple, ByteDance, Snapchat, Canva

Hard
Software Engineer

Evaluate Parenthesized Sums with Unary Minus

Problem Evaluate a valid expression containing decimal numbers, plus, minus, parentheses and spaces. Unary minus is allowed; unary plus is not. Do not...

Coding & AlgorithmsStacks & QueuesParsing & Interpreters
1
0
17 people solved
Netflix logo
Netflix
Medium
Software Engineer

Recommend New Friends from a Mutual-Friendship Graph and Scale the Approach

This round is framed as problem solving rather than pure coding. The interviewer asks you to work out how a social product should suggest new friends ...

Software Engineering FundamentalsGraphsHeaps & Priority Queues
1
0
27 people solved
Aug 31, 2026
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