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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
Meta logo
Meta
Medium
Software Engineer

Compute sparse dot product and count islands

You are asked to solve two coding problems. Problem 1: Sparse vector dot product Given two vectors A and B of the same length n (potentially large, e....

Coding & Algorithms
4
0
71 people solved
Feb 11, 2026
TikTok logo
TikTok
Medium
Backend Software Engineer

Explain Database Index Benefits and Write Costs

Explain Database Index Benefits and Write Costs Why do relational databases use indexes, and why is creating an index on every column usually a poor d...

Software Engineering Fundamentals
2
0
25 people solved
Apr 12, 2026
Amazon logo
Amazon
Medium
Frontend EngineerNew Grad Locked

Format a Forest of Nested Comments

Format an arbitrarily ordered forest of comments as deterministic preorder trees while preserving sibling order and drawing correct continuation and f...

Coding & Algorithms
4
0
45 people solved
Aug 22, 2026
Meta logo
Meta
Hard
Software Engineer

Design a basic bank system API

In-Memory Bank System: API, Data Model, Invariants, Semantics, and Edge Cases Goal Design and implement an in-memory bank system that supports account...

System Design
14
0
102 people solved
Sep 6, 2025
Apple logo
Apple
Medium
Machine Learning Engineer

Optimize image filters on device

You are shipping an image-filter feature that must run entirely on a mobile device. Users expect preview latency below 30 ms on common phones, memory ...

ML System Design
7
0
126 people solved
Mar 1, 2026
Two Sigma logo
Two Sigma
Medium
Data Scientist Locked

Design features for house price prediction

This question evaluates competence in feature engineering, data preprocessing, baseline regression modeling, and model evaluation for tabular price pr...

Machine LearningFeature EngineeringData Cleaning & Wrangling
17
0
130 people solved
Jan 22, 2026
Fannie Mae logo
Fannie Mae
Medium
Data Scientist

Contrast UI vs backend testing; design UI-change test cases

Part A — Differentiate UI vs backend testing: For a single-page web app backed by a BFF (backend-for-frontend) that calls a payment API, explain preci...

Behavioral & Leadership
3
0
70 people solved
Oct 13, 2025
TikTok logo
TikTok
Easy
Data Scientist

Write SQL for TikTok Live creator metrics

You are analyzing TikTok Live sessions and their engagement. Tables live_room Each row is a Live session (“room”) launched by a creator. | column | ty...

Data Manipulation (SQL/Python)SQL
20
0
164 people solved
Oct 9, 2025
Google logo
Google
Medium
Machine Learning Engineer

Implement a Web Crawler with BFS and DFS

Implement a simple web crawler in Python. You are given: - A starting URL. - A function get_links(url) -> list[str] that returns all outgoing links fr...

Coding & Algorithms
6
1
65 people solved
Dec 24, 2025
Walmart Labs logo
Walmart Labs
Medium
Software Engineer Locked

Compute the Minimum Number of Meeting Rooms

Compute the minimum rooms required for half-open meeting intervals, allowing a new meeting to begin exactly as another ends. This algorithm question t...

Coding & Algorithms
4
0
40 people solved
Jul 17, 2026
Amazon logo
Amazon
Hard
Software Engineer

Design a distributed job scheduler service

Design a distributed job scheduler service Design a horizontally scalable, multi-tenant job scheduler service that supports both one-off / ad-hoc jobs...

System DesignJob Scheduling & WorkflowsDistributed Coordination
15
0
164 people solved
Aug 10, 2025
Amazon logo
Amazon
Easy
Data Scientist

Find recommended friend pairs by shared listening

Problem (SQL) You work on a music app and want to recommend new friend connections based on listening similarity. Tables Assume the following schemas:...

Data Manipulation (SQL/Python)SQL
15
1
155 people solved
Nov 20, 2025
Upstart logo
Upstart
Medium
Software Engineer Locked

Implement Byte Formatting and Cafeteria Billing

This question evaluates precision in numeric formatting and unit conversion for byte sizes, along with stateful simulation of capacity-constrained eve...

Coding & Algorithms
3
0
43 people solved
May 18, 2026
Amazon logo
Amazon
Medium
Data Scientist

Solve Algorithmic Challenges in Online Coding Assessments

Scenario Online assessment requiring implementation of common algorithmic problems. Question Given an array of integers and a target, return indices o...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
16
0
143 people solved
Aug 4, 2025
Voleon logo
Voleon
Hard
Machine Learning EngineerSenior+

Explain the Bellman Equation

Explain the Bellman Equation State and explain the Bellman expectation and optimality equations. Show how they decompose value into immediate reward a...

Machine Learning
3
0
37 people solved
Jul 31, 2025
Meta logo
Meta
Hard
Data Engineer

Write SQL for car rental utilization by city

SQL / Data Query Prompt (Car Rental) You are given four tables: user - user_id location - location_id - city car - car_id - car_size (e.g., compact, m...

Coding & AlgorithmsSQL
14
2
211 people solved
Dec 1, 2025
Bloomberg logo
Bloomberg
Hard
Software EngineerNew Grad

Compute the Nth Recency Value

Given an integer n >= 1, define a sequence a as follows: - a[0] = 0 - For each i >= 1: - If a[i - 1] has appeared earlier in the sequence, meaning t...

Coding & Algorithms
5
1
50 people solved
Oct 9, 2025
Capital One logo
Capital One
Medium
Data Scientist

Handle extended team-matching uncertainty

Scenario: Team-Match Stall After Panel Context - You passed a company-wide panel in late February for a Data Scientist role. - First team-match meetin...

Behavioral & Leadership
4
0
73 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Machine Learning EngineerIntern AI Locked

Implement Sparse Matrix Operations

This question evaluates proficiency in sparse linear algebra, efficient algorithms, and data-structure design for numerical and machine learning workl...

Coding & Algorithms
9
0
76 people solved
Feb 8, 2026
Pinterest logo
Pinterest
Medium
Data Scientist

Aggregate video time and unique pins in Python

Part A (category by average time for videos): You receive a list of pin engagement rows and a category map. pins = [ {"pin_id": 10, "category_id": 1,...

Data Manipulation (SQL/Python)
6
0
47 people solved
Oct 13, 2025
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