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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
Whoop logo
Whoop
Hard
iOS EngineerSenior+

Design a BLE Command Handler

Design a Bluetooth Low Energy (BLE) command handler for an iOS application. The app needs to send commands to a wearable device over BLE. Commands mus...

System Design
12
0
95 people solved
Apr 17, 2026
Meta logo
Meta
Medium
Data Scientist

Estimate ads ranking revenue impact

You are the data scientist for an ads ranking team at a large social platform. The team has built a new ranking algorithm for feed ads. The new model ...

Analytics & ExperimentationExperiment Analysis & ReadoutExperiment Design (A/B Testing)
59
0
400 people solved
Apr 30, 2026
Tesla logo
Tesla
Medium
Software Engineer Locked

Design a Video Sharing Platform

Design a large-scale video platform with resumable uploads, idempotent transcoding, adaptive playback, CDN delivery, access control, and moderation ho...

System Design
3
0
38 people solved
Aug 24, 2026
Google logo
Google
Medium
Machine Learning Engineer Locked

Implement substring search and weighted sampling

This question evaluates algorithm design and analysis skills across string processing (efficient substring search) and randomized/data-structure techn...

Coding & AlgorithmsString AlgorithmsMath & Number Theory
22
0
198 people solved
Mar 30, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Time-Versioned Key-Value Store and Time-Window Event Counter

Build two small time-aware data structures. The first is a key-value store that keeps every value a key has had, each tagged with the timestamp at whi...

Software Engineering FundamentalsData Structure DesignBinary Search
1
0
17 people solved
Apr 28, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Design file deduplication algorithm

Design an algorithm to deduplicate files in a storage system. Compare fixed-size versus content-defined chunking and explain how you would choose hash...

Coding & AlgorithmsFile & Media Storage
18
1
314 people solved
Sep 6, 2025
Hinge logo
Hinge
Easy
Data Engineer

Model course sales for a sports venue chain, query it, and track manager history

A chain of sports venues sells classes at each of its venues, and the operations team wants to see sales by venue and by class. You receive three sour...

Data Manipulation (SQL/Python)Dimensional ModelingSQL
0
0
5 people solved
May 12, 2026
Upstart logo
Upstart
Easy
Software Engineer Locked

Report Where a Value Appears

Report four flags showing whether a target appears at an even index, an odd index, in the first half, and in the second half of an even-length list. U...

Coding & Algorithms
6
0
60 people solved
Jul 5, 2026
Tesla logo
Tesla
Hard
Software Engineer

Design concurrency-safe shared payment account API

Design concurrency-safe shared payment account API Prevent Double-Spending When Two Users Pay Simultaneously from the Same Account Context You are des...

System DesignPayments & LedgersAPI Design
10
0
171 people solved
Jul 26, 2025
Point72 logo
Point72
Hard
Data Engineer

Explain Spark Execution and Optimization

You are interviewing for a Data Engineer role. In a 30-minute discussion on production data engineering, the interviewer probes how well you understan...

Software Engineering FundamentalsBatch & Stream ProcessingStorage Formats & Partitioning
20
2
181 people solved
Apr 30, 2026
Rbcroyalbank logo
Rbcroyalbank
Easy
Data EngineerIntern

Explain pandas and SQL basics

You are interviewing for a Data Engineer co-op/intern role. Answer the following short technical questions. Python / pandas: 1. What is the difference...

Data Manipulation (SQL/Python)SQLPandas & Python Data
11
0
82 people solved
Jan 14, 2026
Walmart Labs logo
Walmart Labs
Medium
Software EngineerSenior+ Locked

Design a Large-Scale Real-Time Temperature Collection System

Design large-scale temperature collection with secure sensors, idempotent burst-tolerant ingestion, event and arrival time, current-state projections,...

System Design
9
0
88 people solved
Aug 15, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Effective Permissions in an Inheritance DAG with Allow and Deny Lists

Permissions are inherited along the edges of a directed acyclic graph. Each node, such as a group, a folder or a resource, has its own allow list and ...

Software Engineering FundamentalsGraphsAuthentication & Authorization
2
0
19 people solved
Apr 28, 2026
Amazon logo
Amazon
Medium
Software Engineer

Maximize Forward Jumps to the Last Array Index

Maximize Forward Jumps to the Last Array Index You are given a 0-indexed integer array nums of length n and an integer target. Start at index 0. A jum...

Coding & AlgorithmsDynamic ProgrammingGraphs
1
0
9 people solved
Google logo
Google
Medium
Software Engineer

Return dictionary words matching a prefix

You are given a list of strings words (a dictionary) and a string prefix. Return all words in words that start with prefix. Clarifications/constraints...

Coding & Algorithms
39
0
283 people solved
Mar 9, 2026
Atlassian logo
Atlassian
Medium
Data Scientist

Implement sliding-window rate limiter with dual thresholds

Implement getRequestStatus(urls: List[str]) -> List[str]. The i-th entry in urls represents a single incoming request at timestamp t = i seconds (t st...

Coding & Algorithms
14
0
109 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software EngineerSenior+ Locked

Compute the Median After Each Stream Insertion

Compute the median after every insertion into an integer stream without repeatedly sorting the full prefix. Practice maintaining balanced data structu...

Coding & Algorithms
6
0
77 people solved
May 29, 2026
Shopify logo
Shopify
Medium
Machine Learning Engineer AI Locked

Simulate a rover fleet

This question evaluates skills in simulation design, state management, grid-based movement logic, and handling constraints such as obstacles, boundari...

Coding & Algorithms
5
0
74 people solved
Mar 1, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer Locked

Design a meeting scheduler API

This question evaluates object-oriented design, interval data-structure and algorithmic thinking, and concurrent programming competence by requiring a...

Software Engineering FundamentalsData Structure DesignIntervals & Scheduling
13
0
246 people solved
Feb 12, 2026
CVS Health logo
CVS Health
Medium
Data Scientist

Create and query an e-commerce schema

PostgreSQL only. 1) Create these tables with appropriate types and constraints (choose minimal correct types): products(product_id PK, name NOT NULL, ...

Data Manipulation (SQL/Python)SQL
9
0
150 people solved
Oct 13, 2025
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