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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
Disney logo
Disney
Hard
Software Engineer

Design a personalized recommendation system

System Design: Personalized Recommendations for a Consumer App Context Assume you are building the home-feed recommendations for a large consumer app ...

ML System DesignSystem Design FundamentalsRecommendation Systems
7
0
121 people solved
Sep 6, 2025
Amazon logo
Amazon
Easy
Software Engineer

Find all cells reachable by downhill flow

Problem You are given an m x n grid heights, where heights[r][c] is the elevation of cell (r, c). A drop of water is placed at a starting cell start =...

Coding & Algorithms
12
0
77 people solved
Oct 18, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze Social Media Engagement with SQL Queries

info_stream_views +----------+---------+-----------+-------------------------+-----------------------+------------+ | view_id | post_id | viewer_id |...

Data Manipulation (SQL/Python)
3
0
31 people solved
Aug 4, 2025
Meta logo
Meta
Hard
Software Engineer

Design place-of-interest ML system

Design place-of-interest ML system Design a POI (Places of Interest) Recommendation System Context Design a global POI recommender for a mobile maps/f...

ML System DesignRecommendation SystemsPersonalization
16
1
145 people solved
Jul 17, 2025
Microsoft logo
Microsoft
Hard
Software Engineer Locked

Design a live-stream comments system

This question evaluates design skills for scalable, low-latency real-time comment systems, covering architecture, data modeling, APIs, ingestion and f...

System DesignReal-Time SystemsMessaging & Event-Driven
8
0
87 people solved
Jan 22, 2026
Amazon logo
Amazon
Medium
Data Scientist

Explain Resolving a Complex Technical Challenge Successfully

Explain Resolving a Complex Technical Challenge Successfully Behavioral: Complex Technical Problem You Solved (Data Scientist – Onsite) Prompt Describ...

Behavioral & Leadership
10
0
59 people solved
Aug 4, 2025
Plymouth Rock Assurance Corporation logo
Plymouth Rock Assurance Corporation
Medium
Data ScientistIntern

Compute Fibonacci Numbers

Write a function that returns the nth Fibonacci number. Definitions and requirements: - Use zero-based indexing: fib(0) = 0, fib(1) = 1. - For n >= 2,...

Coding & Algorithms
1
0
34 people solved
Jan 3, 2026
Capital One logo
Capital One
Medium
Machine Learning Engineer

Answer leadership scenarios with STAR

Answer the following behavioral questions with specific examples from your experience: 1. How did you challenge the status quo? 2. Describe a time you...

Behavioral & Leadership
3
0
64 people solved
Dec 15, 2025
Meta logo
Meta
Medium
Data Engineer

Compute reservation diff for largest member

Given copies(copy_id, reserved_by_member_id) and members(member_id, referred_by_member_id), find the member with the largest member_id. Return a singl...

Data Manipulation (SQL/Python)
2
0
21 people solved
Sep 6, 2025
Instacart logo
Instacart
Medium
Software Engineer

Optimize file reads for password validation

Given a multi-gigabyte credentials file on disk with one record per line in the format user_id,salt,password_hash (hex), implement validate(user_id, p...

Coding & AlgorithmsIndexing & Query PerformanceFile & Media Storage
7
0
94 people solved
Jul 31, 2025
Meta logo
Meta
Medium
Data Scientist

Write SQL for initiators and French DAU%

You are given the following PostgreSQL tables. Assume all timestamps are UTC and "today" is 2025-09-01. For any reference to "last 7 days," use the in...

Data Manipulation (SQL/Python)
2
1
21 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Software Engineer

Solve Array, Matrix, and Recommendation Problems

During an onsite coding interview, solve the following independent tasks. Problem 1: In-place unique prefix You are given a nondecreasing integer arra...

Coding & Algorithms
1
0
32 people solved
Apr 17, 2026
Capital One logo
Capital One
Medium
Data Scientist

Maintain target margin with fixed costs

Target Profit Margin With a Mixed-Product Portfolio Context You sell two burger products (classic and vegan) at the same price but with different unit...

Statistics & Math
5
0
60 people solved
Oct 13, 2025
ByteDance logo
ByteDance
Hard
Software Engineer Locked

Count Target-Sum Paths in an N-ary Tree

This question evaluates a candidate's competency in tree data structures and traversal algorithms, specifically counting path sums in N-ary trees and ...

Coding & Algorithms
2
0
23 people solved
May 20, 2026
Amazon logo
Amazon
Medium
Software EngineerIntern Locked

Implement nested object path lookup

This question evaluates parsing and traversal of nested maps and arrays, robust error handling for missing keys and out-of-bounds indices, and reasoni...

Coding & Algorithms
5
0
54 people solved
Oct 31, 2025
Instacart logo
Instacart
Medium
Software Engineer Locked

Implement multiple coding round problems

This multi-part question evaluates algorithmic problem-solving skills including efficient lookup/search, stable ordering and priority management, stre...

Coding & AlgorithmsParsing & InterpretersBinary Search
20
0
206 people solved
Jan 1, 2026
ByteDance logo
ByteDance
Medium
Software EngineerNew Grad Locked

Reconstruct a Binary Tree from Preorder and Postorder Traversals

Reconstruct one deterministic binary tree from preorder and postorder traversals with distinct values. Preserve both traversals, attach an ambiguous s...

Coding & Algorithms
1
0
21 people solved
Aug 13, 2026
Chime logo
Chime
Medium
Data Scientist

Navigate Complex Product Challenges in Behavioral Interviews

Navigate Complex Product Challenges in Behavioral Interviews Behavioral & Leadership Phone Screen — Rapid-Fire Prompts Context You are interviewing fo...

Behavioral & LeadershipLeadership & InfluenceAmbiguity & Decision Making
18
0
127 people solved
Aug 4, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Implement memcpy with misaligned addresses

This question evaluates a candidate's understanding of low-level memory manipulation, pointer alignment, and the implementation of efficient byte-copy...

Coding & Algorithms
5
0
59 people solved
Jan 2, 2026
Affirm logo
Affirm
Medium
Software Engineer

Discuss team fit and leadership with manager

Discuss team fit and leadership with manager Behavioral Interview Prep: 30‑Minute Hiring Manager Conversation (Software Engineer) Context You are prep...

Behavioral & LeadershipProject Deep DiveAmbiguity & Decision Making
12
0
121 people solved
Jul 15, 2025
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