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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
Google logo
GoogleMeta
Easy
Software Engineer

List Available Prices by Product and Store

Problem Return product_id, store and price for each non-NULL store price in Products. The three store labels are store1, store2 and store3. Omit unava...

Data Manipulation (SQL/Python)SQL
0
0
8 people solved
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

Implement SFT Sample Packing

This question evaluates proficiency in preprocessing for autoregressive language models, including deterministic sequence packing, construction of los...

Coding & Algorithms
7
0
83 people solved
Apr 13, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

Implement persistent key-value store

Question Design and implement an in-memory key-value store supporting set(key, value), get(key), shutdown() that flushes all data as bytes to a medium...

Coding & AlgorithmsData Structure Design
36
0
486 people solved
Aug 4, 2025
NVIDIA logo
NVIDIA
Hard
Data Scientist

Optimize CUDA GEMM with tiling and coalescing

CUDA Execution Model, Memory Hierarchy, and GEMM Kernel Design You are interviewing for a Data Scientist / GPU-software role at NVIDIA. The interviewe...

Coding & AlgorithmsGPU Programming
26
0
469 people solved
Oct 13, 2025
Coinbase logo
Coinbase
Medium
Software Engineer Locked

Design query pagination for large datasets

This question evaluates a candidate's understanding of pagination strategies, cursor/keyset design, SQL query formulation, consistency guarantees unde...

System DesignAPI DesignIndexing & Query Performance
32
0
260 people solved
Feb 11, 2026
Booking.com logo
Booking.com
Medium
Software Engineer

Design a Real-Time Logging System

Design a logging/telemetry system for a large application platform. Requirements: - Many services send log or metric events to the system - Event subm...

System DesignObservabilityMessaging & Event-Driven
10
0
206 people solved
Mar 15, 2026
ByteDance logo
ByteDance
Medium
Machine Learning Engineer

Design Self-Dealing Detection for Marketplaces

Design a machine learning system to detect self-dealing or fake transactions in an e-commerce marketplace. In this setting, a seller may use related b...

ML System Design
6
0
75 people solved
Mar 27, 2026
Datadog logo
Datadog
Hard
Software Engineer

Design an image detection system

System Design: End-to-End Image Object-Detection Service Context Design a production-grade service that ingests user-uploaded images, runs object dete...

ML System DesignSystem Design FundamentalsComputer Vision
49
0
336 people solved
Sep 6, 2025
Snapchat logo
Snapchat
Medium
Data Scientist

Compute same-day acceptance metrics last week

Assume today is 2025-09-01; interpret 'last week' as 2025-08-25 through 2025-08-31 inclusive, using UTC dates. You have the following schema and sampl...

Data Manipulation (SQL/Python)
7
0
58 people solved
Oct 13, 2025
Confluent logo
Confluent
Hard
Software Engineer

Design a distributed key-value store at scale

Design a distributed key-value store at scale System Design Prompt: Globally Distributed, Read-Optimized Key-Value Store Context and minimal assumptio...

System DesignKey-Value StoresConsistency & Availability
40
0
414 people solved
Jul 26, 2025
Apple logo
AppleGoogle
Medium
Software Engineer

Values Appearing Alone Without Consecutive Neighbors

Problem A value x is lonely if it occurs exactly once in nums and neither x - 1 nor x + 1 occurs anywhere in the array. Return every lonely value, in ...

Coding & AlgorithmsArrays & Strings
1
0
10 people solved
Netflix logo
Netflix
Medium
Software Engineer

Group users by same last K watched movies

You are given a list of users' movie-watching histories. Each user’s history is an ordered list of movie IDs in the order they were watched (earliest ...

Coding & AlgorithmsArrays & Strings
14
0
270 people solved
Dec 8, 2025
Mercor logo
Mercor
Medium
Software Engineer

Explain Kubernetes autoscaling and traffic routing

In Kubernetes: 1) How does autoscaling work (pod and node scaling)? 2) How is traffic routed from outside the cluster to the right Pods? 3) What are t...

System DesignContainers & OrchestrationNetworking
14
0
245 people solved
Jan 17, 2026
Uber logo
Uber
Medium
Software Engineer

Return a Package Build Order

You are given an API: `python get_dependencies(package) -> list[str] ` It returns the direct dependencies of a given package. If package A depends on ...

Coding & Algorithms
8
0
103 people solved
Jan 28, 2026
SoFi logo
SoFi
Medium
Software Engineer

Implement a multithreaded task executor with semaphores

Design and implement a thread-safe TaskExecutor that limits concurrent work using a semaphore-like mechanism. You are given an interface similar to: -...

Coding & AlgorithmsConcurrencyLow-Level Design (OOP)
18
0
204 people solved
Feb 4, 2026
Capital One logo
Capital One
Medium
Data Scientist

Compute Customer Spend and Engineer Features for 2023

transactions +-----------+-------------+--------+------------+--------------+ | tran_id | customer_id | amount | tran_date | merchant_cat | +------...

Data Manipulation (SQL/Python)
124
0
597 people solved
Aug 4, 2025
Perplexity logo
Perplexity
Medium
Software Engineer

Design a CreditTracker with expirations

Design a CreditTracker class with three methods: ( 1) add_credit(start_time, end_time, credit), ( 2) subtract_credit(time, credit), and ( 3) check_cre...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
53
0
461 people solved
Aug 10, 2025
Sierra logo
Sierra
Medium
Product Manager

Staying current on fast-moving AI developments as a PM, and acting on what matters

AI moves quickly. How do you stay up to date with what is happening in the field? `hint Show a system, not a reading list Naming sources is the easy p...

Behavioral & LeadershipSelf-Awareness & GrowthAI Product Management
1
0
9 people solved
May 16, 2026
Figureai logo
Figureai
Medium
Data EngineerSenior+ Locked

Design a Telemetry Platform Ingesting Two Gigabytes per Second

Design a robotics telemetry platform handling two gigabytes of raw events per second. Reason through capacity, edge buffering, durable ingestion, repl...

System Design
4
0
52 people solved
May 20, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Behavioral: Delivering Under a Tight Deadline and Handling a Difficult Situation

This question comes from a competency-based behavioral round for a senior engineering role. The round is unhurried: the interviewer asks only a few qu...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
3
0
22 people solved
Jun 16, 2026
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