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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Altruist logo
Altruist
Hard
Software Engineer

Design scalable rate limiter with token bucket

You are asked to design and implement a rate limiter for an HTTP API. Requirements - Limit each client (e.g., user ID or API key) to at most N request...

System DesignRate LimitingData Structure Design
21
0
151 people solved
Oct 16, 2025
Millennium logo
Millennium
Medium
Software Engineer

Implement paginated API ingestion

You are given a REST endpoint GET /orders?page=1&limit=100 that returns JSON objects of the form { "page": n, "per_page": m, "total_pages": T, "data":...

Data Manipulation (SQL/Python)API Integration & HTTP Clients
18
0
327 people solved
Sep 6, 2025
MathWorks logo
MathWorks
Easy
Software Engineer

Maximize minimum after K decrements

You are given an integer array A of length N and an integer K. You must perform exactly K operations. In each operation, choose any index i and do A[i...

Coding & Algorithms
5
0
87 people solved
Mar 1, 2026
LinkedIn logo
LinkedIn
Medium
Machine Learning Engineer

Sample index from weighted probability distribution

Given an array weights[0..M-1] representing a discrete distribution over M outcomes, implement a function sampleIndex(weights) that returns an index i...

Coding & AlgorithmsProbability
9
2
177 people solved
Feb 18, 2026
Uber logo
Uber
Medium
Software Engineer Locked

Deep Equality of Two Records

This coding question tests a software engineer's ability to implement recursive structural comparison across nested, heterogeneous data types. It eval...

Coding & Algorithms
2
0
28 people solved
Jun 23, 2026
Box logo
Box
Medium
Software Engineer

Identify and fix deadlock in locked code

Identify and fix deadlock in locked code Multithreaded Deadlock: Diagnose and Fix Context You have concurrent code that acquires multiple locks and oc...

System DesignConcurrencyDebugging
22
0
214 people solved
Aug 1, 2025
Lyft logo
Lyft
Medium
Software Engineer

Implement paginated retrieval of transactions

Implement paginated retrieval of transactions Given a large list of transaction records (id, userId, amount, createdAt), implement APIs to return tran...

Coding & AlgorithmsAPI Design
14
0
214 people solved
Jul 27, 2025
Disney logo
Disney
Medium
Software Engineer

Solve grid shortest path with BFS

Given a 2D grid containing 0s (open cells) and 1s (walls), and coordinates for a start (sr, sc) and a target (tr, tc), return the length of the shorte...

Coding & Algorithms
9
0
90 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Data Scientist

Write SQL to compute campaign net revenue

Using the schema and sample data below, write SQL to produce, for each campaign_id and segment, the following metrics for August 2025: total_reached, ...

Data Manipulation (SQL/Python)SQLBusiness Case Analysis
21
0
154 people solved
Oct 13, 2025
Instacart logo
Instacart
Medium
Software Engineer

Implement a banking operations system

Implement a simple banking system that manages multiple accounts with initial balances. Support operations: deposit(accountId, amount), withdraw(accou...

Coding & AlgorithmsData Structure Design
18
0
238 people solved
Aug 1, 2025
Chime logo
Chime
Medium
Data Scientist

Write SQL for noisy A/B launch metrics

PostgreSQL. Today is 2025-09-01. You’re given the following schema and toy samples: users(user_id INT, country TEXT, signup_date DATE, marketing_chann...

Data Manipulation (SQL/Python)
3
0
36 people solved
Oct 13, 2025
Google logo
Google
Medium
Data Scientist

Find most co‑purchased product pairs in SQL

Given the schema and sample data below, write ANSI-SQL to return the top 5 unordered product pairs most frequently purchased together across distinct ...

Data Manipulation (SQL/Python)SQLIndexing & Query Performance
25
1
176 people solved
Oct 13, 2025
Google logo
Google
Hard
Software Engineer

Diagnose distributed database inconsistency

Distributed Database Incident: Inconsistent Replicas You are on-call for a distributed database that serves production traffic. Dashboards show data i...

System DesignDebuggingConsensus & Replication
17
0
137 people solved
Sep 6, 2025
Nuro logo
Nuro
Medium
Software Engineer Locked

Group points by distance threshold

This question evaluates understanding of geometric graph construction and connectivity, computational geometry concepts such as Euclidean distance, an...

Coding & AlgorithmsGraphsArrays & Strings
8
0
112 people solved
Feb 11, 2026
Expedia logo
Expedia
Medium
Software Engineer

Count vowel-only substrings with all vowels

Count vowel-only substrings with all vowels Given a lowercase English string s, return the number of contiguous substrings that ( 1) consist only of v...

Coding & AlgorithmsTwo Pointers & Sliding Window
15
0
124 people solved
Aug 9, 2025
Datadog logo
Datadog
Medium
Software Engineer

Explain a project concisely and deeply

Behavioral: Impactful Project — 60–90s Overview + Deep Dive Provide a concise 60–90 second overview of one impactful project you owned or led, then do...

Behavioral & LeadershipProject Deep Dive
24
0
206 people solved
Sep 6, 2025
Instacart logo
Instacart
Medium
Software Engineer

Evaluate dependent variable expressions

Question Given a target variable name and a list of assignment strings of the form 'Ti = expression' where the expression is either a number, a single...

Coding & Algorithms
32
0
162 people solved
Jul 29, 2025
Bobyard logo
Bobyard
Medium
Software Engineer

How do you debug slowness and bugs?

The interviewer asked two practical engineering questions: 1. A web application's frontend is loading very slowly. Describe how you would diagnose the...

Software Engineering Fundamentals
5
0
59 people solved
Apr 9, 2026
HubSpot logo
HubSpot
Hard
Software Engineer

Design a Netflix-like streaming platform

Question Design a Netflix-like video streaming platform. Viewers must be able to browse and search a catalog, stream titles with adaptive bitrate (ABR...

System DesignFile & Media StorageCaching
25
0
254 people solved
Jul 31, 2025
Capital One logo
Capital One
Medium
Data Scientist

Refactor code and enforce robustness

Code Review and Refactor: Summing a CSV Column Context You are reviewing a short Python script that sums a numeric column from a CSV using pandas. You...

Coding & AlgorithmsCode Quality & MaintainabilityPandas & Python Data
9
0
146 people solved
Oct 13, 2025
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