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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
OpenAI logo
OpenAI
Medium
Software Engineer Locked

Design a Text-to-Video Generation Service

This question evaluates understanding of ML system design, distributed scheduling, durable asynchronous job pipelines, GPU resource orchestration, and...

ML System DesignGPU InfrastructureJob Scheduling & Workflows
15
0
175 people solved
May 22, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Debug a driver assignment bug

Given a service that selects the best delivery driver ("dasher") for an order, users report incorrect assignments. With a provided codebase and failin...

Coding & AlgorithmsDebuggingTesting & Quality
53
0
413 people solved
Aug 13, 2025
Mercor logo
Mercor
Medium
Software Engineer

Explain Kubernetes autoscaling and traffic routing

In Kubernetes: 1) How does autoscaling work (pod and node scaling)? 2) How is traffic routed from outside the cluster to the right Pods? 3) What are t...

System DesignContainers & OrchestrationNetworking
12
0
215 people solved
Jan 17, 2026
Uber logo
Uber
Medium
Software Engineer

Count subarrays with at least k fruit pairs

Given an integer array nums where each value denotes a fruit type, and an integer k: For any subarray, define a 'pair' for fruit value v if its freque...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
14
0
119 people solved
Sep 6, 2025
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a Visa-like payment processing system

This question evaluates a candidate's ability to design a secure, low-latency card payment processing network, testing knowledge of distributed system...

System DesignPayments & LedgersDistributed Transactions & Idempotency
29
0
504 people solved
Feb 12, 2026
Palo Alto Networks logo
Palo Alto Networks
Medium
Software Engineer

Design a Scheduler and Metrics Platform

Design a cloud-native job scheduling and metrics monitoring platform for a Kubernetes-like environment. The platform should allow internal users to su...

System Design
7
0
69 people solved
Feb 20, 2026
C3 AI logo
C3 AI
Medium
Software EngineerNew Grad

Maximum-Sum Star with at Most K Arms

Given a simple undirected graph with an integer value on each node and an integer k, return the largest node-value sum of any nonempty star subgraph w...

Coding & AlgorithmsGraphsGreedy
1
0
22 people solved
Jan 23, 2026
Databricks logo
Databricks
Medium
Backend EngineerSenior+ Locked

Design a Distributed File System

This question evaluates design skills for large-scale distributed storage systems, testing understanding of distributed systems principles such as met...

System DesignFile & Media StorageConsensus & Replication
61
0
479 people solved
May 4, 2026
Google logo
Google
Medium
Machine Learning Engineer

Implement a Transformer Block with SwiGLU

Implement a Transformer-style neural network block in Python using either NumPy or PyTorch. Your implementation should include: 1. Multi-head self-att...

Coding & Algorithms
4
0
52 people solved
Dec 24, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Implement topological sort and tree boundary traversal

You are given two separate coding tasks. Problem A — Order courses with prerequisites You have n courses labeled 0..n-1 and a list of prerequisite pai...

Coding & AlgorithmsGraphsTrees
34
0
600 people solved
Feb 12, 2026
ZipHQ logo
ZipHQ
Hard
Software Engineer

Design in-memory DB with TTL and history

In-Memory Database: Progressive Design in 4 Levels You are designing a simplified in-memory database to be implemented in four progressive levels. Eac...

System DesignData Structure Design
79
0
587 people solved
Sep 6, 2025
Harvey logo
Harvey
Medium
Software Engineer

Handle multi-source string matching and tagging

Question Given an LLM output string and a list of source strings, design an algorithm to count how many times each source appears in the output. Exten...

Coding & Algorithms
27
0
181 people solved
Jul 29, 2025
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Solve tree and DP problems

This coding round contained two algorithm questions: 1. Deepest shared ancestor in a binary tree You are given the root of a binary tree and two di...

Coding & AlgorithmsTreesDynamic Programming
48
0
331 people solved
Oct 24, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Fix a Round-Robin Load Balancer, Then Implement Consistent Hashing

In a debugging-format onsite round, you work on the component that decides which backend server handles each incoming request. The round has two piece...

Software Engineering FundamentalsPartitioning & Consistent HashingConcurrency
2
0
19 people solved
Jan 18, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Count Four-Neighbor Islands in a Binary Matrix

Given a two-dimensional binary matrix, return the number of islands. An island is a connected component of cells containing 1. Cells connect only thro...

Coding & AlgorithmsGrids & Matrices
1
0
18 people solved
Mar 18, 2026
Coinbase logo
Coinbase
Medium
Software Engineer Locked

Maintain the Kth-Highest User Score with Updates and Removals

Maintain the current kth-highest user score while users are added, updated, and removed, counting tied scores separately and returning null when too f...

Coding & Algorithms
3
0
66 people solved
May 12, 2026
LinkedIn logo
LinkedIn
Easy
Software Engineer AI Locked

Debug Queues and Solve Arrays

This multi-part question evaluates competencies in data structures (heap invariants and in-place array manipulation), concurrent programming (designin...

Coding & AlgorithmsHeaps & Priority QueuesArrays & Strings
13
0
185 people solved
Mar 10, 2026
Tesla logo
Tesla
Hard
Software Engineer Locked

Implement a Rollback Key-Value Store

This question evaluates competency in designing data structures and state-management mechanisms, focusing on rollback/undo semantics, versioning, and ...

Coding & Algorithms
3
0
69 people solved
Apr 9, 2026
Two Sigma logo
Two Sigma
Hard
Data ScientistIntern Locked

Why use the t-statistic?

This question evaluates understanding of the t-statistic as a standardized test measure connecting effect size, variance, and sample size, and probes ...

Statistics & MathHypothesis TestingSampling & Estimation
16
0
151 people solved
Apr 2, 2026
Amazon logo
Amazon
Medium
Software Engineer

Maximize weighted subsequence pairs with wildcards

You are given a string s of length n consisting only of characters '0', '1', and '!'. Each '!' can be replaced by either '0' or '1'. For the final bin...

Coding & AlgorithmsDynamic Programming
122
0
1100 people solved
Jan 27, 2026
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