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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
570
Updated
10.05.2026
12.0k 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
Google logo
Google
Medium
Software Engineer Locked

Design a Billing-Token Rate Limiter for AI Agents

Design a rate limiter that controls the number of billing tokens consumed by AI-agent requests. Connect requirements and APIs to data modeling, consis...

System DesignRate LimitingDistributed Transactions & Idempotency
27
0
404 people solved
Aug 1, 2026
Uber Freight logo
Uber Freight
Medium
Software Engineer

Low-Level Design of an In-Memory File System with mkdir and ls

Design a basic file system that supports two operations, mkdir and ls. The interviewer cares about the design and the approach rather than complete ru...

Software Engineering FundamentalsLow-Level Design (OOP)
0
0
6 people solved
Sep 25, 2026
Sierra logo
Sierra
Hard
Software Engineer

Split Markdown Into Header-Aware Chunks

Implement a function that splits a Markdown document into ordered chunks, where each chunk must not exceed a given size limit. A Markdown header is a ...

Coding & AlgorithmsParsing & Interpreters
24
0
352 people solved
Apr 3, 2026
Google logo
Google
Hard
Data Analyst

Investigate a Decrease in Webpage Warnings

Investigate a Decrease in Webpage Warnings A system that warns users about malicious webpages shows a decrease in the number of warnings displayed. Ho...

Analytics & ExperimentationMetric DiagnosticsData Quality & Validation
0
0
14 people solved
Sep 9, 2026
Microsoft logo
Microsoft
Medium
Software Engineer

Implement the Linux cp Command, Then Explain Its OS and C++ Internals

How would you implement the Linux cp command? Write it, then be ready for the discussion to go deep into the operating-system and C++ concepts underne...

Software Engineering FundamentalsOperating Systems
2
0
16 people solved
Sep 6, 2026
Amazon logo
Amazon
Hard
Software Engineer Locked

Responding to a Difficult Engineering Challenge

Build a concrete behavioral answer about diagnosing and resolving a difficult engineering challenge under uncertainty. The prompt probes personal cont...

Behavioral & Leadership
13
0
95 people solved
Aug 30, 2026
Digitalocean logo
Digitalocean
Medium
Software Engineer

Design a Database Migration Service with Replication and Bottleneck Analysis

Design a database migration service. Explain how it copies existing data, keeps up with ongoing changes if required, scales the work, and identifies b...

System DesignConsensus & Replication
1
0
20 people solved
Sep 16, 2026
Amazon logo
Amazon
Medium
Software EngineerNew Grad

Explain Tight-Deadline Delivery and a Missed Deadline

Discuss two deadline situations: one in which you worked under a tight deadline, and one in which you did not complete the work by the deadline. Part ...

Behavioral & LeadershipOwnership & ExecutionFailure & Learning
5
0
42 people solved
Aug 30, 2026
eBay logo
eBay
Easy
Applied Scientist

Optimizing BERT inference latency and throughput for a production NLP service

A fine-tuned BERT-style encoder serves predictions in production (for example, classifying or tagging short text). It is now too slow or too expensive...

Machine LearningMLOps & Model Serving
0
0
7 people solved
Sep 24, 2026
Siemens logo
Siemens
Medium
Machine Learning EngineerSenior+

Discuss Post-Training Ownership, Failure, and Disagreement

Discuss your experience with language-model post-training through three concrete work examples: a project you owned end to end, a failure, and a disag...

Behavioral & LeadershipProject Deep Dive
2
0
19 people solved
Sep 4, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer

Merge Sorted Arrays, Then Scale to Huge Files and a Global Sort of N Files

Start with an easy coding task: merge two sorted sequences of integers into one sorted sequence. The interviewer then scales the same task up twice, a...

Software Engineering FundamentalsSorting
0
0
12 people solved
Sep 15, 2026
Google logo
Google
Medium
Software EngineerNew Grad

Solve Two Coding Interview Problems

You are asked to solve two independent coding problems. Problem 1: Evaluate Nested Math Expressions Implement a function that evaluates a string expre...

Coding & Algorithms
12
0
140 people solved
Apr 8, 2026
xAI logo
xAI
Medium
Frontend Engineer

Design a Real-Time Collaborative Document Editor with Concurrent Edits

Design a collaborative document editor: several people open the same document, edit it at the same time, and see each other's changes in near real tim...

System DesignReal-Time SystemsState Management
2
0
22 people solved
Sep 5, 2026
Scale AI logo
Scale AI
Easy
Backend Engineer Locked

Design a Durable Task Scheduling Service

Design a durable distributed scheduler for one-time and recurring tasks while keeping scheduling separate from execution. Define lifecycle and time se...

System DesignJob Scheduling & WorkflowsDistributed Coordination
29
1
237 people solved
Jul 27, 2026
Airbnb logo
Airbnb
Medium
Software Engineer Locked

Design a Multi-Level In-Memory Cloud Storage Service

Design staged in-memory cloud storage with prefix ranking, user capacity, merging, and conflict-aware backup and restore while surfacing unspecified s...

Software Engineering Fundamentals
9
0
63 people solved
Aug 25, 2026
Meta logo
Meta
Easy
Software Engineer

Check Whether a Letters-and-Numbers Abbreviation Matches a Word

A word can be abbreviated by replacing some of its non-empty substrings with their lengths, written in decimal. For example, "abbreviation" can be wri...

Coding & AlgorithmsTwo Pointers & Sliding Window
1
0
12 people solved
Sep 21, 2026
Chime logo
Chime
Medium
Data Scientist

Define and Analyze Early Engagement

Define and Analyze Early Engagement A product team has a users dataset and a transactions dataset. The team asks how to define early engagement, compu...

Data Manipulation (SQL/Python)Metrics & KPIsSegmentation & Cohort Analysis
5
0
89 people solved
Aug 17, 2026
Meta logo
Meta
Medium
Software Engineer

Group Binary Tree Nodes by Vertical Column, Top to Bottom and Left to Right

Given a binary tree, report its node values column by column. The root is at column 0 and row 0. A left child is one column to the left of its parent ...

Coding & AlgorithmsTrees
2
0
20 people solved
Sep 14, 2026
Anthropic logo
Anthropic
Medium
Software Engineer

Debug a GRPO training loop and explain ratios

You are given a simplified implementation of a GRPO (Group Relative Policy Optimization) training step for an RLHF-style policy model. The training is...

Machine LearningReinforcement Learning
235
0
2391 people solved
Feb 19, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Design a resilient bootstrap API

Design a Resilient Bootstrap API When a client app loads, it needs to fetch everything required to render the first screen in a single call. That data...

System DesignFault Tolerance & FailoverAPI Design
201
1
2986 people solved
Feb 13, 2026
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