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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
Atlassian logo
Atlassian
Medium
Software EngineerSenior+ Locked

Highlight the Shortest Unique Substring in Each Label

Find the shortest case-insensitive substring unique to each label, break ties by earliest position, and mark that occurrence without changing the orig...

Coding & Algorithms
60
1
466 people solved
Aug 26, 2026
Scale AI logo
Scale AI
Easy
Machine Learning Engineer Locked

Design an Embedding and Classification API

Design an API that generates text embeddings and optional compatible classifications for interactive and batch requests. Cover version contracts, prep...

ML System DesignMLOps & Model ServingAPI Design
72
0
844 people solved
Jul 27, 2026
Robinhood logo
Robinhood
Medium
Software EngineerSenior+ Locked

Design Payment Processing with Idempotency and Reconciliation

Design a payment-processing service that accepts payment requests, sends them to an external provider, and records each outcome durably. The question ...

System DesignPayments & LedgersDistributed Transactions & Idempotency
9
0
83 people solved
Sep 4, 2026
Upstart logo
Upstart
Medium
Software Engineer Locked

Compute Buffet Revenue with Waiting Guests and Repeat Visits

Simulate buffet seating, FIFO waiting, early departures, and repeat visits while charging each guest at most once per day.

Coding & AlgorithmsSimulation & State MachinesStacks & Queues
12
0
134 people solved
Sep 12, 2026
Microsoft logo
MicrosoftLinkedInGoogle

Also asked at Google, Amazon, Meta, Bloomberg, Oracle, Sprinklr

Medium
Software Engineer

Select the Smallest Cross-Array Pair Sums

Problem From two nondecreasing integer arrays nums1 and nums2, return k pairs [nums1[i],nums2[j]] having the smallest sums. Distinct index pairs count...

Coding & AlgorithmsHeaps & Priority Queues
3
0
25 people solved
Optiver logo
Optiver
Hard
Software EngineerIntern

Implement a Multicore Overheat Prevention Controller

Problem Simulate a firmware controller that prevents a multicore processor from overheating. Each core has a configured workload, all cores share pass...

Coding & AlgorithmsSimulation & State Machines
103
0
1496 people solved
Apr 21, 2026
Google logo
GoogleBloombergMicrosoft

Also asked at Microsoft, Amazon, Meta

Medium
Software Engineer

Recover a Signed Value among Threefold Repetitions

Problem Every value in nums appears exactly three times except one value that appears once. Return that value. Your solution must take linear time and...

Coding & AlgorithmsBit Manipulation
2
0
22 people solved
Google logo
Google
Medium
Software Engineer

Earliest Time a Friendship Log Connects Everyone, With Hop Limit and Unfriends

You are given a list of friendship log entries and the total number of users n. Each entry has the form `text timestamp, userA connects to userB ` mea...

Software Engineering FundamentalsGraphs
8
0
102 people solved
Sep 16, 2026
OpenAI logo
OpenAI
Medium
Software Engineer

At-Least-Once Job Queue with Timeouts, Retries, a Dead-Letter Queue and Dependencies

Implement an in-memory task scheduling queue that provides at-least-once delivery and has a dead-letter queue (DLQ). The reported interface is: - enqu...

Software Engineering FundamentalsData Structure DesignJob Scheduling & Workflows
10
0
116 people solved
Sep 18, 2026
NVIDIA logo
NVIDIA
Medium
Software EngineerSenior+ Locked

Design an Autonomous-Vehicle Camera Pipeline and Its Perception System

Design an autonomous-vehicle camera pipeline, from synchronized capture and image signal processing to the perception system that turns multi-camera f...

System DesignSystem Design FundamentalsComputer Vision
12
0
87 people solved
Sep 15, 2026
Databricks logo
Databricks
Medium
Software EngineerSenior+ Locked

Implement a Concurrent Buffered File Logger

Design a logger that accepts writes from many threads, buffers records, and appends them safely to one file while preserving a documented ordering gua...

Software Engineering FundamentalsConcurrency
50
0
389 people solved
Jul 30, 2026
Perplexity logo
Perplexity
Medium
Software Engineer Locked

Design a Long-Running Query Service

Design a long-running query service with durable jobs, asynchronous status and results, resource limits, and clear retry, cancellation, and failure be...

System DesignJob Scheduling & WorkflowsAPI Design
30
0
231 people solved
Sep 1, 2026
Squarepoint logo
SquarepointGoogleMicrosoft

Also asked at Microsoft, Jane Street, Meta, Amazon, Uber, Rippling, Liberty Mutual

Hard
Software Engineer

Maintain Editable Text around a Bounded Cursor

Problem Implement TextEditor, initially containing empty text with its cursor at the beginning. - addText(text) inserts the supplied text at the curso...

Coding & AlgorithmsData Structure DesignArrays & Strings
2
0
42 people solved
Tesla logo
Tesla
Easy
Software Engineer

Design a Content Delivery Network

Design a content delivery network (CDN). Clarify which content it serves, where its users are, how often content changes, and what access-control and ...

System DesignCachingFault Tolerance & Failover
12
0
82 people solved
Sep 4, 2026
Snowflake logo
Snowflake
Medium
Software Engineer Locked

Find Tree Height After Deleting Nodes and Promoting Children

Compute tree height after deleting nodes while promoting their children, preserving descendants and counting retained nodes without rebuilding the tre...

Coding & AlgorithmsTreesDynamic Programming
24
0
170 people solved
Sep 20, 2026
Stripe logo
Stripe
Medium
Software Engineer Locked

Register Data Centers and Route to the Nearest Healthy Region

Process a deterministic command language for registering data centers, changing health, measuring Haversine distance, and routing to healthy regions, ...

Coding & AlgorithmsSimulation & State Machines
105
2
945 people solved
Aug 13, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer

Design a Scalable Error Message Counting Service

Design an error message counter: a service that receives the error messages applications emit and reports how many times each error has occurred. Trea...

System DesignObservabilitySystem Design Fundamentals
11
0
120 people solved
Sep 24, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Design a Kafka-Based File Watcher for Millions of Files

Design a Kafka file watcher for millions of files with source sharding, durable events, per-file ordering, missed-event reconciliation, and version-aw...

System DesignMessaging & Event-DrivenData Ingestion & CDC
30
0
212 people solved
Sep 20, 2026
Reddit logo
Reddit
Hard
Software Engineer Locked

Design Add, Overwrite, Undo, and Redo for Billing State

Design billing-state commands that progress from additive updates to absolute overwrites and reversible history. The answer defines before-and-after c...

Software Engineering Fundamentals
18
0
133 people solved
Sep 4, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Show How Feedback Changed Your Engineering Approach

Describe feedback you received and how you adjusted your work in response. What a Strong Answer Covers Give the actual substance of the feedback, your...

Behavioral & LeadershipSelf-Awareness & Growth
1
0
12 people solved
Oct 23, 2026
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