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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
GoogleMicrosoftAmazon

Also asked at Amazon, Meta, Bloomberg, Oracle, Lyft, ByteDance, TikTok

Medium
Software Engineer

Sort a Linked Chain with Constant-Workspace Merge Passes

Problem Return the head of a singly linked list after sorting it in ascending, nondecreasing value order. Keep the original ListNode pointer interface...

Coding & AlgorithmsSortingLinked Lists
4
0
23 people solved
Databricks logo
Databricks
Medium
Software Engineer

Design an online bookstore: DB insert succeeds but SQS publish fails, and duplicate messages

Design the backend of an online bookstore where customers browse books and place orders. When an order request arrives, the service inserts the order ...

System DesignDistributed Transactions & IdempotencyMessaging & Event-Driven
7
1
111 people solved
Aug 9, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Describe a Time You Gave Someone Feedback

Tell me about a time you gave another person feedback. Explain what prompted it, how you delivered it, how the person responded, and what happened aft...

Behavioral & LeadershipConflict & CollaborationCommunication & Stakeholders
1
0
17 people solved
Oct 18, 2026
Netflix logo
Netflix
Hard
Machine Learning Engineer

Review a Feature Pipeline PR for Production Risks, Then Serve Features by Freshness

In the practical coding half of a machine learning screen, the interviewer pastes a pull request that changes a feature pipeline: the code that turns ...

ML System DesignML Data Pipelines & Feature StoresBatch & Stream Processing
3
0
52 people solved
Sep 28, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Bootstrap Service: Aggregate Downstream Services and Return the Right HTTP Status

Implement a bootstrap service that calls several independent downstream services concurrently, aggregates their data into one response for a client ap...

Software Engineering FundamentalsAPI Integration & HTTP ClientsAPI Design
30
0
237 people solved
Sep 7, 2026
ByteDance logo
ByteDance
Medium
Data EngineerNew Grad

Schedule Tasks With Ready Times on Limited Resources to Finish the Last One Earliest

You have limited compute resources and a set of tasks to run. For every task you know its execution time and its ready time, the earliest moment it ma...

Software Engineering FundamentalsGreedy
0
0
7 people solved
Nov 2, 2026
Axon logo
Axon
Hard
Software Engineer Locked

Design a Nearest-Timestamp Status Record Service

Design a service that ingests out-of-order officer status records and returns the retained record nearest a requested event time, preferring the earli...

System DesignSystem Design FundamentalsIndexing & Query Performance
29
0
406 people solved
Aug 2, 2026
Netflix logo
NetflixAmazonGoogle

Also asked at Google, Microsoft, Oracle, Uber

Easy
Software Engineer Locked

Implement an In-Memory Key-Value Cache With Per-Entry Time Limits

Design a cache with per-entry expiration and implement the JavaScript set, get, and count operations with precise expiry boundaries.

Software Engineering FundamentalsData Structure DesignCaching
16
0
108 people solved
Capital One logo
Capital One
Medium
Software EngineerSenior+ Locked

Design a Banking Component with Transfers and Activity Rankings

Design accounts, deposits, transfers, and activity rankings with clear invariants, exact amounts, explicit ranking rules, and a string-input test harn...

Software Engineering FundamentalsLow-Level Design (OOP)Payments & Ledgers
12
0
161 people solved
Aug 23, 2026
Pinterest logo
Pinterest
Hard
Software Engineer Locked

Maintain an Escape-Room Leaderboard

Design and implement an EscapeRoomGame for a fixed set of players and rooms 0 through R. Work through the function contract, boundary cases, correctne...

Coding & AlgorithmsData Structure Design
25
0
364 people solved
Aug 2, 2026
Waymo logo
Waymo
Medium
Software Engineer Locked

Implement an ObjectTracker That Merges Observations From Two Perception Systems

Two perception systems track the same objects under different IDs. Implement an ObjectTracker with addLink, addObservation and getHistory that returns...

Software Engineering FundamentalsData Structure DesignGraphs
4
0
66 people solved
Sep 10, 2026
Google logo
Google
Medium
Software Engineer

Check Whether Two Ordered Sequences Can Be Merged

You are given two arrays of integer labels, a and b. The order of labels in each array gives ordering constraints: an earlier label must appear before...

Coding & AlgorithmsGraphs
14
0
108 people solved
Aug 26, 2026
Goldman Sachs logo
Goldman Sachs
Medium
Quantitative Researcher

Minimum-Cost Round Trip Visiting Every City Once with Asymmetric Costs

A salesperson must visit n cities. The cost of traveling directly from city i to city j is dist[i][j], and every city can be reached directly from eve...

Coding & AlgorithmsDynamic ProgrammingBit Manipulation
2
0
34 people solved
Sep 25, 2026
Revolut logo
Revolut
Medium
Software Engineer

Build a Java restaurant table booking service that prevents double bookings

In a timed live coding session you build a working restaurant booking system in Java. You share your screen from your own IDE and you may use an AI co...

Software Engineering FundamentalsLow-Level Design (OOP)Intervals & Scheduling
10
0
89 people solved
Jun 30, 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
11 people solved
Oct 23, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Meta, Anduril, Microsoft, TCS

Easy
Software Engineer

Traverse Binary-Tree Values in Left-Root-Right Order

Problem Return the node values of a binary tree in inorder: traverse the left subtree, then the current node, then the right subtree. The input is an ...

Coding & AlgorithmsTrees
2
0
25 people solved
Affirm logo
Affirm
Medium
Software Engineer Locked

Determine Redeemable Promotion Offers from Event History

Determine each event user's redeemable promotions at a cutoff by replaying ordered redeem and unredeem events, applying half-open offer windows and pe...

Coding & Algorithms
70
1
555 people solved
Aug 25, 2026
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Convert Streaming Call-Stack Samples into Function Events

Convert timestamped call-stack samples into ordered function start and end events, preserving frame depth and recursive occurrences. Handle stack chan...

Coding & AlgorithmsArrays & StringsStacks & Queues
155
2
1121 people solved
Aug 5, 2026
Amazon logo
Amazon
Medium
Software Engineer

Simulate one disc-flipping board game move across all eight directions

You are simulating one move of a two-player board game played on an m x n grid. Each cell is 0 (empty), 1 (a piece of player 1) or 2 (a piece of playe...

Coding & AlgorithmsSimulation & State MachinesGrids & Matrices
25
0
185 people solved
Sep 24, 2026
LinkedIn logo
LinkedIn
Medium
Data Scientist

State the Mean and Variance of a Poisson Count

State the Mean and Variance of a Poisson Count If the number of arrivals in a fixed interval follows a Poisson distribution with parameter lambda, wha...

Statistics & MathProbability
5
0
45 people solved
Sep 22, 2026
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