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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
Rippling logo
Rippling
Medium
Software Engineer AI Locked

Design a Driver Payroll System

This question evaluates a candidate's understanding of data structure design, time-series aggregation, and algorithmic complexity for in-memory accoun...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues
38
0
306 people solved
Mar 21, 2026
Ramp logo
Ramp
Hard
Software EngineerSenior+ Locked

Present a System You Designed

Present a system you personally designed, moving from the problem and constraints through architecture, ownership, and key trade-offs. A strong explan...

Behavioral & Leadership
6
0
93 people solved
May 25, 2026
Pinterest logo
Pinterest
Medium
Machine Learning Engineer Locked

Rank Newly Launched Ads Under Cold Start

Design a cold-start ranker for ads launched within the last seven days. Combine creative, campaign, advertiser, context, and uncertainty signals with ...

ML System DesignCTR Prediction & Ads MLRanking Models
19
0
140 people solved
Jul 2, 2026
Meta logo
Meta
Hard
Software Engineer Locked

Check Whether Deleting at Most K Characters Can Form a Palindrome

Determine whether deleting at most k characters can turn a string into a palindrome, including the special case where k = 1. Then handle the general c...

Coding & Algorithms
8
0
72 people solved
Aug 3, 2026
Google logo
Google
Medium
Software Engineer Locked

Design a Music Recommendation System with an LLM Agent

Design a music recommender with candidate generation, ranking, feedback loops, cold-start handling, diversity, and offline and online evaluation. Add ...

ML System Design
10
1
94 people solved
Aug 11, 2026
xAI logo
xAI
Medium
Software Engineer

Fix race condition in concurrent deposit

Concurrent bank account debugging (thread safety) You are given a simple BankAccount object that is used concurrently from multiple threads. Two depos...

Software Engineering FundamentalsConcurrency
27
1
287 people solved
Dec 15, 2025
Whatnot logo
Whatnot
Easy
Software Engineer Locked

Count User Journey Prefixes

This question evaluates the ability to reconstruct per-user action sequences from timestamped logs, aggregate and count path prefixes, and apply data-...

Coding & AlgorithmsTreesSorting
22
0
201 people solved
Apr 1, 2026
OpenAI logo
OpenAI
Hard
Machine Learning Engineer

Debug transformer and train classifier

Debug and Fix a Transformer Text Classifier, Then Train and Evaluate It You inherit a small codebase for a transformer-based text classifier. It ships...

Machine LearningML CodingModel Evaluation
208
0
2438 people solved
Aug 4, 2025
Headway logo
Headway
Medium
Software Engineer

Handle traffic spikes and estimate server capacity

Scenario You are designing and operating a backend service that receives API requests from clients. Recently, the service becomes slow or times out wh...

System DesignReliability & SREObservability
21
0
245 people solved
Feb 11, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Morgan Stanley, UST

Medium
Software Engineer

Reduce a Target by Removing Array Ends

Problem In each operation, remove the current leftmost or rightmost element of nums and subtract that element from x. The removal changes which elemen...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
0
0
8 people solved
Oracle logo
Oracle
Medium
Software Engineer Locked

Maximum Subarray Sum with a Length Cap

Compute the maximum sum of a nonempty contiguous subarray whose length cannot exceed a given cap. The prompt fixes negative-only behavior, integer-wid...

Coding & Algorithms
8
0
87 people solved
Sep 5, 2026
Bloomberg logo
BloombergGoogleDoorDash

Also asked at DoorDash, Meta, Amazon, Microsoft, Walmart Labs, Adobe, Oracle, Morgan Stanley

Medium
Software Engineer

Find the Next Larger Integer with the Same Digits

Problem Rearrange the decimal digits of positive n to obtain the smallest integer strictly larger than n. Return -1 if none exists or if the smallest ...

Coding & AlgorithmsGreedyArrays & Strings
1
0
16 people solved
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a KV store with QPS API

This question evaluates a candidate's ability to design scalable, highly available key-value storage systems and to integrate real-time metrics report...

System DesignKey-Value Stores
38
0
731 people solved
Feb 4, 2026
Patreon logo
Patreon
Medium
Software Engineer

Evaluate word-guess feedback with repeats

You are implementing feedback for a Wordle-like guessing game. Part 1 — Produce feedback for one guess You are given two strings of equal length guess...

Coding & AlgorithmsArrays & StringsSimulation & State Machines
29
0
225 people solved
Dec 2, 2025
Agoda logo
Agoda
Easy
Data EngineerSenior+ Locked

Sum Employee Working Time from Ordered Check-In and Check-Out Events

Pair ordered employee attendance events and total working seconds, including multiple shifts and intervals crossing midnight.

Data Manipulation (SQL/Python)SQL
3
0
29 people solved
Sep 11, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Design a dependency-aware job scheduler

This question evaluates understanding of designing scalable, dependency-aware job schedulers and related competencies in distributed systems, includin...

System DesignJob Scheduling & WorkflowsFault Tolerance & Failover
23
0
436 people solved
Jan 5, 2026
Goldman Sachs logo
Goldman SachsMicrosoftJPMorgan Chase
Medium
Software Engineer

First Champion to Win k Consecutive Array Comparisons

Problem The array has distinct values. Each round compares its first two entries; the larger stays first and the smaller moves to the end. Stop when o...

Coding & AlgorithmsSimulation & State MachinesArrays & Strings
1
0
15 people solved
Anthropic logo
Anthropic
Medium
Software Engineer Locked

Same-Domain Web Crawl (BFS)

This question evaluates a candidate's ability to implement graph traversal using breadth-first search while applying a domain-matching filter and dedu...

Coding & Algorithms
7
0
101 people solved
Jun 23, 2026
Disney logo
Disney
Medium
Data Engineer

Hiring Manager Behavioral Round: Project Impact, Influence, Communication, and Setbacks

Question This is the hiring-manager round for a data engineering role: a roughly 30-45 minute conversation, not a peer coding interview. The interview...

Behavioral & Leadership
4
0
90 people solved
Mar 27, 2026
Headway logo
Headway
Medium
Product Manager

Explaining your motivation and fit for a Headway PM role in mental health care access

Explain to the interviewer why you want to join Headway as a product manager. `hint Connect the problem, the model and you Link the access problem Hea...

Behavioral & LeadershipMotivation & Fit
0
0
8 people solved
Aug 31, 2026
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