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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
xAI logo
xAI
Easy
Software Engineer

Implement an in-memory database with TTL and backup

In-Memory Database (Levels 1–4: TTL and Backup/Restore) Implement an in-memory database that stores records identified by a string key. Each record co...

Coding & AlgorithmsData Structure Design
129
2
1243 people solved
Jan 6, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Convert stack samples to trace events

Question Implement convertToTrace(samples) that, given a chronologically ordered vector of stack samples (each sample contains a timestamp and a call-...

Coding & AlgorithmsStacks & QueuesSimulation & State Machines
219
4
1297 people solved
Jul 29, 2025
Plaid logo
Plaid
Medium
Software Engineer

Design a coupon redemption system

Implement an in-memory coupon service supporting: addCoupon(code, discount, expiresAt, totalLimit, perUserLimit); redeem(userId, code, now) -> success...

Coding & AlgorithmsData Structure Design
43
0
813 people solved
Sep 6, 2025
Google logo
Google
Medium
Software Engineer Locked

Consolidate On-Call Rotation Segments

This question evaluates proficiency with interval manipulation, set management, sorting and event ordering, and the use of appropriate data structures...

Coding & Algorithms
21
0
123 people solved
May 25, 2026
Amazon logo
Amazon
Medium
Software Engineer

A Problem That Needed Deep Analysis: Knowing You Focused on the Right Things

Tell me about a problem you had to solve that required in-depth thought and analysis. How did you know you were focusing on the right things, and what...

Behavioral & LeadershipAmbiguity & Decision MakingProject Deep Dive
0
0
9 people solved
Sep 10, 2026
Disney logo
Disney
Medium
Software Engineer

Discuss Your Proudest Project and Interest in a Role

Describe the project you are most proud of and explain why you are interested in the role you are interviewing for. Connect your contribution and lear...

Behavioral & LeadershipProject Deep DiveMotivation & Fit
0
0
8 people solved
Sep 8, 2026
Imc logo
Imc
Easy
Hardware Engineer Locked

Choose Between Two Machines and Allocate Work from Performance Curves

Choose between two machine types using latency-throughput curves, request shape, batching, queueing, cost, and service objectives. The solution covers...

System Design
1
0
29 people solved
Aug 24, 2026
Coreweave logo
Coreweave
Medium
Software Engineer Locked

Design Tree Operations with DFS and BFS

This Coreweave software engineering question evaluates tree operations using DFS and BFS. It prepares candidates to compare traversal strategies, reas...

Software Engineering FundamentalsLow-Level Design (OOP)Trees
20
0
217 people solved
Jul 2, 2026
Revolut logo
Revolut
Medium
Software EngineerNew Grad

Implement a thread-safe money transfer

Problem: Implement a concurrent-safe transfer function You are given an in-memory store of bank accounts: - Each account has an accountId and a balanc...

Coding & AlgorithmsConcurrency
20
0
304 people solved
Feb 11, 2026
Citadel logo
Citadel
Hard
Software Engineer

Design a low-latency trading system

System Design: Low-Latency Electronic Trading Platform (Equities) You are designing a single-region electronic trading platform (exchange/ATS-like) th...

System DesignTrading SystemsDistributed Transactions & Idempotency
146
0
1520 people solved
Aug 9, 2025
Amazon logo
Amazon
Hard
Software Engineer Locked

Find a Maximum-Sum Window in a Sparse Array

Find the maximum sum of any fixed-length window in an enormous sparse array represented by nonoverlapping constant-value segments. Sweep compressed br...

Coding & Algorithms
8
0
78 people solved
Jul 10, 2026
Robinhood logo
Robinhood
Medium
Software Engineer Locked

Maintain Fractional Stock Inventory Across Orders

Simulate sequential customer buy and sell orders while keeping a firm's fractional stock inventory between zero and one share. The task uses scaled in...

Coding & Algorithms
8
0
72 people solved
Jun 22, 2026
Mercor logo
Mercor
Medium
Machine Learning Engineer AI

Build an Ollama Eval Harness

Design and implement a lightweight evaluation harness for a language model served locally through Ollama. The harness should: - Read a dataset of eval...

ML System DesignLLM Evaluation
36
0
344 people solved
Mar 19, 2026
Decagon logo
Decagon
Medium
Software Engineer

Enumerate 4x4 Tic-Tac-Toe Games

You are given an empty $4 \times 4$ board. Two players, X and O, alternate turns with X moving first. A player wins as soon as they place three of the...

Coding & AlgorithmsBacktracking & RecursionSimulation & State Machines
84
0
785 people solved
Mar 9, 2026
Cursor logo
Cursor
Medium
Backend EngineerNew Grad

Design Scalable Notification Rate Limiter

Design a production-grade rate limiter for notification sending that enforces limits at three levels of an organizational hierarchy. The system expose...

System DesignRate LimitingDistributed Transactions & Idempotency
137
0
1021 people solved
Feb 18, 2026
Nuro logo
Nuro
Hard
Software Engineer

Explain Project Scope, Ownership, and Technical Challenges

Describe a project you worked on. Explain its scope, your personal responsibilities, the overall design, and the hardest technical challenge you encou...

Behavioral & LeadershipProject Deep DiveSystem Design Fundamentals
2
0
20 people solved
Aug 31, 2026
Google logo
Google
Easy
Software Engineer Locked

Busiest Rental Car

This question evaluates a candidate's ability to simulate a resource-allocation process using interval scheduling and greedy assignment rules. It test...

Coding & Algorithms
12
1
68 people solved
Jun 22, 2026
Apple logo
Apple
Easy
Machine Learning Engineer Locked

Implement Masked Multi-Head Self-Attention

This question evaluates implementation and conceptual understanding of masked multi-head self-attention, covering scaled dot-product attention, separa...

Machine LearningTransformers & AttentionML Coding
74
0
522 people solved
Apr 4, 2026
Digitalocean logo
Digitalocean
Medium
Software Engineer

Clarify a Longest-Repeating-Character Replacement Problem

Discuss how to specify and solve a longest-repeating-character replacement problem. Clarify the replacement operation and the target segment before se...

Software Engineering FundamentalsTwo Pointers & Sliding Window
1
0
16 people solved
Sep 16, 2026
Versemedical logo
Versemedical
Medium
Software Engineer Locked

Build a Paginated Provider Search Backend and React Filter UI

Build a paginated provider search feature spanning a PostgreSQL query, backend route, and React interface. The question tests safe optional filters, n...

Software Engineering Fundamentals
8
0
58 people solved
Jul 1, 2026
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