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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
Squarepoint logo
Squarepoint
Medium
Quantitative Researcher Locked

Find Values Whose Removal Minimizes Pairing Cost

Find every value whose removal minimizes the optimal absolute-difference pairing cost. Use sorting, adjacent-pair structure, and prefix-suffix reasoni...

Coding & Algorithms
21
0
156 people solved
Aug 29, 2026
Serval logo
Serval
Medium
Software Engineer Locked

Find Shared Motion Periods Across Camera Streams

Convert thresholded camera readings into closed active periods, then report the periods shared by every stream. Account for isolated readings, timesta...

Coding & Algorithms
6
0
87 people solved
Jul 12, 2026
Netflix logo
Netflix
Medium
Software Engineer

Design a Streaming Subscription System: Billing, Plan Changes and Payment Retries

You are designing the subscription system for a video streaming service such as Netflix. A member picks a paid plan, is charged automatically at the s...

System DesignPayments & LedgersDistributed Transactions & Idempotency
3
0
39 people solved
Apr 20, 2026
Microsoft logo
MicrosoftBloombergGoogle

Also asked at Google, Meta, Amazon, IBM, Siemens

Medium
Software Engineer

Insert the Fewest Parentheses to Make a String Balanced

Problem A valid parentheses string is empty, a concatenation of two valid strings, or a valid string enclosed in one matching pair. Given s, insert on...

Coding & AlgorithmsGreedyStacks & Queues
1
0
9 people solved
Bloomberg logo
Bloomberg
Hard
Software Engineer

Count Alternative Insertion Orders for One BST

Problem Insert the distinct values of nums, a permutation of 1..n, into an empty binary search tree in their given order. Count other permutations of ...

Coding & AlgorithmsTreesMath & Number Theory
0
0
12 people solved
Airbnb logo
Airbnb
Medium
Machine Learning EngineerSenior+ Locked

Explain ML Project Milestones, Scope, and Conflict

Explain an ML project through scope decisions, measurable milestones, stakeholder conflict, online readiness, and evidence-based changes to the plan.

Behavioral & LeadershipProject Deep DiveConflict & Collaboration
4
0
45 people solved
Sep 4, 2026
Snowflake logo
Snowflake
Hard
Software Engineer

Design transactional in-memory key-value store

Problem Design and implement an in-memory key–value store that supports basic operations plus transactions. Core API Implement the following operation...

Coding & AlgorithmsData Structure DesignConcurrency
70
0
577 people solved
Nov 4, 2025
Squarepoint logo
Squarepoint
Medium
Data Scientist Locked

Estimate Market Beta from Aligned Asset and Benchmark Returns

Define market beta, identify the benchmark data needed beyond a stock's returns, and explain regression estimation and uncertainty.

Statistics & MathRegression & Statistical Modeling
2
0
43 people solved
Sep 9, 2026
Ramp logo
Ramp
Medium
Software Engineer Locked

Implement a Single-Screen Tic-Tac-Toe Game with State Management

This Ramp software engineering question evaluates state management through a single-screen tic-tac-toe implementation. It helps candidates practice mo...

Software Engineering FundamentalsSimulation & State MachinesState Management
25
0
180 people solved
Jul 2, 2026
Ramp logo
Ramp
Hard
Software Engineer Locked

Design Calendar Event CRUD with Unit Tests

This Ramp software engineering question asks candidates to design calendar event CRUD behavior with unit tests. It is useful preparation for interview...

Software Engineering FundamentalsLow-Level Design (OOP)Testing & Quality
37
0
276 people solved
Jul 2, 2026
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Design Instagram (Feed, Photos, and Friend Recommendations)

This question evaluates a candidate's ability to design a large-scale, read-heavy social media backend, covering data modeling for follow graphs, medi...

System DesignSearch & Feed SystemsCaching
21
0
220 people solved
Jun 23, 2026
Mintlify logo
Mintlify
Medium
Backend EngineerSenior+

Design a CRUD API for a document service

Design the CRUD API for a document service: clients create, read, update and delete documents. This came up as a fundamentals question in a short hiri...

Software Engineering FundamentalsAPI Design
1
0
21 people solved
Sep 27, 2026
ZipHQ logo
ZipHQ
Medium
Software Engineer

Implement a Vending Machine

Design and implement the core logic for a vending machine using object-oriented principles. The machine stores products, accepts bills, tracks the cur...

Software Engineering FundamentalsLow-Level Design (OOP)Simulation & State Machines
54
0
479 people solved
Jan 28, 2026
Google logo
GoogleMetaBloomberg
Hard
Software Engineer

Evaluate Nested Unions and Concatenations of Words

Problem Evaluate the valid expression as a set of lowercase words. A letter denotes its one-letter word. Braces containing a comma-separated list of t...

Coding & AlgorithmsParsing & InterpretersBacktracking & Recursion
1
0
9 people solved
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Design Distributed Sorting Around an Explicit Helper Contract

Explain distributed sorting through helper-contract clarification, range partitioning, shuffling, duplicate handling, skew, and globally ordered outpu...

Software Engineering FundamentalsSortingBatch & Stream Processing
7
0
65 people solved
Aug 27, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Make Rider Addition and Dispatch Safe Under Concurrency

Make concurrent rider addition and dispatch safe with atomic availability-to-assignment transitions, idempotent adds, narrow locks, and explicit distr...

Software Engineering FundamentalsConcurrencyData Structure Design
11
0
98 people solved
Sep 10, 2026
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Disagreeing, Then Fully Backing the Team's Chosen Direction

Give an example of a time a group you belonged to made a decision you disagreed with, and you committed to it anyway. Explain what the decision was, h...

Behavioral & LeadershipConflict & Collaboration
1
0
16 people solved
Aug 23, 2026
Apple logo
Apple
Medium
Software Engineer Locked

Find the K Closest Pairs in a Sorted Array

Implement k_closest_pairs(nums, k) for a strictly increasing sorted array. Work through the function contract, boundary cases, correctness argument, a...

Coding & AlgorithmsHeaps & Priority Queues
16
2
254 people solved
Aug 9, 2026
OpenAI logo
OpenAI
Medium
iOS EngineerSenior+ Locked

Implement A Mobile Chat Interface In An Existing Codebase

Prepare for a mobile engineering prompt about implementing a ChatGPT-style chat interface inside an unfamiliar existing codebase. The interview focuse...

Software Engineering FundamentalsiOSPrioritization & Tradeoffs
22
0
157 people solved
Jul 3, 2026
Exa logo
Exa
Hard
Machine Learning Engineer

Design a Streaming Percentile Estimator

Design a Streaming Percentile Estimator The source reports a percentile-estimation discussion that escalated to a plus-or-minus error guarantee and a ...

Statistics & Math
13
0
110 people solved
Apr 18, 2026
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