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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
ByteDance logo
ByteDance
Medium
Software EngineerSenior+

Implement Sliding Windows and LRU Cache

You are given two coding tasks. Task 1: Longest Subarray of Ones Given a binary array nums and an integer k, return the maximum length of a contiguous...

Coding & Algorithms
4
0
42 people solved
Apr 20, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Design a Sliding-Hour Top-Restaurants Service

Design a continuously updated top-ten restaurant service for a trailing one-hour order window, accounting for duplicates, late events, approximate cou...

System Design
3
0
49 people solved
May 26, 2026
Two Sigma logo
Two Sigma
Hard
Data Scientist Locked

Add two integer strings using digit-adder

This question evaluates proficiency in string-based arithmetic, digit-wise addition, carry propagation, and management of arbitrarily large non-negati...

Coding & Algorithms
12
0
105 people solved
Jan 6, 2026
Imc logo
Imc
Hard
Software Engineer Locked

When to use a dictionary vs an array?

This question evaluates understanding of data structures—arrays/lists versus dictionaries/hash maps—focusing on access patterns, time complexity for c...

Software Engineering Fundamentals
30
0
274 people solved
Jan 17, 2026
NVIDIA logo
NVIDIA
Hard
Data Scientist

Optimize CUDA GEMM with tiling and coalescing

CUDA Execution Model, Memory Hierarchy, and GEMM Kernel Design You are interviewing for a Data Scientist / GPU-software role at NVIDIA. The interviewe...

Coding & AlgorithmsGPU Programming
26
0
469 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist Locked

Fake Accounts [AE]

Evaluates probability, classification metrics, and feature engineering for fake-account detection. Strong answers apply Bayes' rule with rate-weighted...

Statistics & MathProbabilityFeature Engineering
227
6
572 people solved
Jul 12, 2025
MathWorks logo
MathWorks
Medium
Software Engineer

Count interval intersections

Question For a list of n segments, where each segment i has start[i] and end[i], compute for every segment the count of other segments that intersect ...

Coding & Algorithms
6
0
79 people solved
Aug 4, 2025
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Behavioral: Delivering Under a Tight Deadline and Handling a Difficult Situation

This question comes from a competency-based behavioral round for a senior engineering role. The round is unhurried: the interviewer asks only a few qu...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
3
0
22 people solved
Jun 16, 2026
DoorDash logo
DoorDash
Hard
Software Engineer

Design Real-Time Driver Pay Aggregation

Design a production system that ingests a high-volume stream of delivery-order events and continuously computes each driver's (Dasher's) daily pay. Th...

System DesignBatch & Stream ProcessingIntervals & Scheduling
45
0
717 people solved
Feb 6, 2026
CVS Health logo
CVS Health
Hard
Data Scientist

Design a flu-shot A/B/n campaign experiment

Fall 2025 Flu Vaccination Uplift Experiment — Design and Evaluation Context (assume a large US pharmacy with loyalty IDs) - Audience: Adults with loya...

Analytics & Experimentation
10
0
85 people solved
Oct 13, 2025
SoFi logo
SoFi
Medium
Software Engineer

Implement a multithreaded task executor with semaphores

Design and implement a thread-safe TaskExecutor that limits concurrent work using a semaphore-like mechanism. You are given an interface similar to: -...

Coding & AlgorithmsConcurrencyLow-Level Design (OOP)
18
0
204 people solved
Feb 4, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

In-Memory Key-Value Store with Constant-Time Nested Transactions

Implement an in-memory key-value store with transactions. It supports get, set and delete, plus begin, commit and rollback, and the question asks for ...

Software Engineering FundamentalsData Structure DesignTransactions & Isolation
1
0
15 people solved
Apr 28, 2026
Apple logo
Apple
Medium
Data Scientist

Remove shortest subarray to sort array

Given an integer array nums (length up to 2×10^5), return the shortest subarray [L,R] you can remove so that the remaining elements form a non‑decreas...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
9
0
152 people solved
Oct 13, 2025
Optiver logo
Optiver
Hard
Quantitative Trader

Optimize interval-scoring strategy

Optimize interval-scoring strategy Five-Round Interval-Estimation Game: Optimal Intervals and Risk Allocation You play five independent rounds. In rou...

Statistics & MathProbabilityDynamic Programming
27
0
256 people solved
Aug 7, 2025
Amazon logo
AmazonGoogleJosh Technology

Also asked at Josh Technology, Meta, Bloomberg

Medium
Software Engineer

Largest Sum of Symmetric List Partners

Problem A singly linked list has even length n. Pair each node at zero-based position i in the first half with the node at position n - 1 - i. Return ...

Coding & AlgorithmsLinked Lists
0
0
7 people solved
MongoDB logo
MongoDB
Medium
Software EngineerSenior+

Summarize background, challenge project, and failure

Behavioral & Leadership Screen — Software Engineer (Hiring Manager Round) This is a hiring-manager technical screen. After a brief warm-up, the interv...

Behavioral & LeadershipProject Deep DiveFailure & Learning
17
0
251 people solved
Sep 6, 2025
Retell AI logo
Retell AI
Hard
Software Engineer

Design a Cloud Call-Center Platform for Programmatic Outbound Calls

A SaaS company offers a programmatic calling platform. Business customers (enterprises) integrate through an API: they submit a request to place an ou...

System Design
10
0
138 people solved
Jan 10, 2026
Meta logo
Meta
Hard
Software Engineer

Design a price tracking system

Question Design a price tracking system for e-commerce sites (similar to price-history tools such as CamelCamelCamel or Keepa). The system ingests pro...

System DesignETL & Data PipelinesAPI Integration & HTTP Clients
23
0
239 people solved
Sep 6, 2025
Pinterest logo
Pinterest
Hard
Software Engineer

Design a high-throughput distributed rate limiter

Question Design a high-throughput, distributed rate-limiting service that runs across multiple regions with low latency and burst tolerance. The servi...

System DesignRate LimitingPartitioning & Consistent Hashing
21
0
362 people solved
Sep 6, 2025
Notion logo
Notion
Medium
Software Engineer

Implement Recursive React JSON Viewer with Collapse

Implement Recursive React JSON Viewer with Collapse React JSON Tree Viewer (Read-Only, Recursive) Design and implement a React component that accepts ...

Software Engineering FundamentalsReact & UI Frameworks
65
0
444 people solved
Jul 17, 2025
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