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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
Cursor logo
Cursor
Medium
Software Engineer Locked

Design a CI/CD Job Scheduler

Design a multi-tenant CI/CD scheduler with dependency-aware jobs, fair resource placement, durable state, retries, and worker-loss recovery.

System Design
25
0
365 people solved
Aug 21, 2026
NVIDIA logo
NVIDIA
Medium
Software EngineerSenior+

Design Scheduler Claims, Execution Guarantees, and Recovery

Design the reliability mechanisms for a distributed job scheduler with multiple executors. Address three questions: how to ensure a scheduled work ite...

System DesignJob Scheduling & WorkflowsDistributed Coordination
1
0
19 people solved
Oct 15, 2026
Amazon logo
AmazonTCSGoogle

Also asked at Google, Microsoft, Bloomberg, Meta, Oracle, ServiceNow, Goldman Sachs, Walmart Labs, EPAM Systems, Cognizant, Salesforce, Infosys, Zoho

Hard
Software Engineer

Find the First Absent Positive Integer

Problem The integer array values is unsorted and may include repeated values, zeroes, and negative numbers. Return the first absent positive integer: ...

Coding & AlgorithmsArrays & Strings
2
0
30 people solved
NVIDIA logo
NVIDIA
Medium
Software EngineerSenior+

Hash-Partition an Array on the GPU in C++ and Return Partition Offsets

Implement hash partitioning on a GPU in C++. You are given an array of n keys and a number of partitions P; each key belongs to partition hash(key) % ...

Software Engineering FundamentalsGPU Programming
4
0
34 people solved
Oct 5, 2026
Harvey logo
Harvey
Medium
Software Engineer Locked

Eager Spreadsheet Formulas with Constant-Time Reads

Implement eager spreadsheet formulas with constant-time cached reads, transitive dependency updates, cycle rejection, and atomic definition replacemen...

Coding & AlgorithmsData Structure DesignGraphs
21
0
327 people solved
Sep 1, 2026
Databricks logo
Databricks
Medium
Frontend Engineer Locked

Design a Typeahead Search System

Design typeahead across client state and backend retrieval, including matching, ranking, cache keys, stale-response protection, permissions, and laten...

System DesignState ManagementRetrieval & Candidate Generation
5
0
100 people solved
Sep 15, 2026
Atlys logo
Atlys
Medium
Software Engineer

Design a Splitwise-Style Expense Splitter with Minimum-Transaction Debt Settlement

Design a shared-expense app in the style of Splitwise. Members of a group record expenses that one person paid on behalf of several people, the app ke...

Software Engineering FundamentalsLow-Level Design (OOP)API Design
8
0
72 people solved
Oct 18, 2026
Google logo
Google
Medium
Machine Learning Engineer

Design a watch-next video recommender and derive its losses and optimizer update rules

Design the "watch next" recommendations for a large video-sharing platform. While a user is watching a video, the system chooses and orders a list of ...

ML System DesignRecommendation SystemsNeural Networks & Training
20
0
176 people solved
Aug 20, 2026
Reddit logo
Reddit
Medium
Android Engineer

Exclude Opposite-Category Comments and Their Descendants

Each comment has a unique ID, a parent comment ID or no parent, and a dog or cat category. For a dog-preferring viewer, exclude every cat comment and ...

Coding & AlgorithmsTrees
1
0
15 people solved
Oct 21, 2026
Circle logo
Circle
Medium
Software Engineer Locked

In-Memory Bank System With Top-N Activity Ranking and Expiring Pending Transfers

Implement an in-memory banking class in stages: create accounts, deposit and pay, rank the top n accounts by transaction activity, and support transfe...

Software Engineering FundamentalsData Structure Design
14
0
141 people solved
Sep 4, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Handle a Short Payment Traffic Surge through a Third-Party Processor

Design a payment flow on top of a third-party processor for a short event with high concurrent traffic. Cover idempotency, prevention of duplicate cha...

System DesignPayments & LedgersAPI Integration & HTTP Clients
1
0
12 people solved
Oct 23, 2026
Alibaba logo
Alibaba
Medium
Site Reliability EngineerSenior+

Monitoring and Alerting for a Service You Operate as the Sole On-Call Engineer

You would be the only engineer in a US office who deploys and develops a cloud service and keeps it running. The service runs in the company's own US ...

Software Engineering FundamentalsObservabilityReliability & SRE
1
0
21 people solved
Oct 11, 2026
Cohere logo
Cohere
Medium
Data Engineer Locked

Load Daily JSONL LLM Chat Logs Into a Warehouse: Schema, Validation, Dedup, Idempotency

A data engineering take-home: load daily JSONL files of LLM conversation logs from object storage into a warehouse, with schema DDL, parsing, validati...

Data Manipulation (SQL/Python)ETL & Data PipelinesData Quality & Validation
8
0
111 people solved
Sep 22, 2026
Whatnot logo
Whatnot
Hard
Software Engineer

Reconstruct Each User's Journey from Unordered Activity Logs

An app writes one log entry for every user action, and the entries reach you in no particular order. Each entry records which user acted, when, and wh...

Coding & AlgorithmsSorting
7
1
69 people solved
Aug 14, 2026
OpenAI logo
OpenAI
Medium
Product Manager

North-Star and Guardrail Metrics for Shared Team Workspaces in ChatGPT

Suppose OpenAI adds collaborative workspaces to ChatGPT, so that a team can work with the assistant in a shared space instead of each person working i...

Analytics & ExperimentationMetrics & KPIsCausal Inference
2
0
36 people solved
Oct 7, 2026
Google logo
GoogleBloombergAmazon

Also asked at Amazon, LinkedIn, Waymo, Meta, Microsoft, Cisco, Citadel, NVIDIA, Meesho, Sprinklr, Zoox

Hard
Software Engineer

Count Collinear Points with Exact Integer Directions

Problem Given distinct integer-coordinate points, return the greatest number lying on one straight line. Lines may be vertical, horizontal, or sloped....

Coding & AlgorithmsMath & Number Theory
4
1
34 people solved
Pinterest logo
Pinterest
Hard
Software Engineer Locked

Count Distinct Active Pins per Time Segment from Overlapping Interaction Logs

Given pin interaction logs with start and end times, count how many distinct pins are active in each time segment when the same pin can have many over...

Coding & AlgorithmsIntervals & Scheduling
25
0
176 people solved
Sep 2, 2026
Stripe logo
Stripe
Hard
Software Engineer Locked

Find Weekly Deployment Windows Across Time Zones

Find fixed-duration deployment windows on a repeating UTC week by translating local allow and freeze rules, respecting lead time, wraparound intervals...

Coding & AlgorithmsIntervals & Scheduling
157
0
2344 people solved
Aug 27, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Design a Donation System for a Three-Day Fundraising Campaign

Design a system that collects donations during a fundraising campaign that runs for three days. Donors pick a charity, choose an amount and pay. The s...

System DesignPayments & LedgersDistributed Transactions & Idempotency
13
0
121 people solved
Sep 16, 2026
Abridge logo
Abridge
Hard
Software Engineer

Run-Length Compress a Character List With Multi-Digit Counts

You are given a non-empty list chars of single characters. Compress it with run-length encoding: scan the list from left to right and split it into ma...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
5
0
75 people solved
Sep 24, 2026
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