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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
Microsoft logo
Microsoft
Hard
Data Scientist

Design a model for imbalanced conversions

Predicting Purchase Propensity After a Campaign (5% Positives) You previously ran a marketing campaign to 10,000 customers and observed 500 purchases ...

Machine Learning
12
0
85 people solved
Oct 13, 2025
The Trade Desk logo
The Trade Desk
Medium
Machine Learning Engineer

Design a time-travel key-field store with TTL

Problem Implement an in-memory “database” that stores records by key and fields within each key. Each operation is given a timestamp (integer, non-dec...

Coding & AlgorithmsData Structure DesignKey-Value Stores
7
0
138 people solved
Nov 19, 2025
Microsoft logo
Microsoft
Medium
Software Engineer

Describe handling ambiguity and resolving design conflicts

Answer the following behavioral prompts with concrete examples (you can assume a software engineering role): Prompt A — Delivering with little guidanc...

Behavioral & LeadershipAmbiguity & Decision MakingConflict & Collaboration
15
0
112 people solved
Feb 12, 2026
OneMain Financial logo
OneMain Financial
Easy
Data Scientist

Calculate Break-even for New Credit Card Product Launch

Calculate Break-even for New Credit Card Product Launch Break-Even for a Credit Card with Annual Fee, Interchange, and Cashback Context You are evalua...

Analytics & ExperimentationBusiness Case AnalysisMath & Number Theory
16
1
127 people solved
Aug 4, 2025
Salesforce logo
Salesforce
Medium
Machine Learning EngineerSenior+

Explain ML and LLM fundamentals

You are interviewing for an AI Engineer role. Explain the following concepts and how they affect real systems: 1. What is F1 score, and when is it mor...

Machine LearningML FundamentalsModel Evaluation
11
0
103 people solved
Jan 12, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer Locked

Can You Place N Objects?

This question evaluates array traversal, adjacency-constraint reasoning, and greedy placement intuition, emphasizing handling of boundary conditions a...

Coding & AlgorithmsGreedyArrays & Strings
13
0
111 people solved
Mar 22, 2026
Amazon logo
Amazon
Medium
Software Engineer

Find all pairs summing to target in sorted array

Given a non-decreasing array of integers nums and an integer target, return all unique pairs of indices (i, j) with i < j such that nums[i] + nums[j] ...

Coding & Algorithms
9
0
67 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Hard
Software Engineer

Compute discounted prices and full-price indices

You are given an array prices of length \(n\). Items are sold from left to right, and each item’s final selling price is computed as follows: For item...

Coding & AlgorithmsStacks & Queues
21
0
145 people solved
Mar 1, 2026
Snapchat logo
Snapchat
Medium
Data Scientist

Monitor Friend-Request System for Quality and Abuse

Friendship +--------------+-------------+---------------------+---------------------+ | requester_id | approver_id | request_ts | approval_ts...

Data Manipulation (SQL/Python)
112
1
375 people solved
Jul 12, 2025
TikTok logo
TikTok
Hard
Machine Learning Engineer

Walk through resume under pressure and critique

Question Walk me through four significant projects on your resume. For each project, cover: 1. Problem, context, and constraints — the user/business p...

Behavioral & LeadershipProject Deep DiveOwnership & Execution
13
0
116 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Software EngineerSenior+

Debug distributed-system performance problems

You are asked: “If a distributed system has a performance problem (latency/throughput regression), how would you approach it?” Describe a practical, s...

Software Engineering FundamentalsDebuggingObservability
7
0
91 people solved
Dec 17, 2025
Google logo
Google
Medium
Data Scientist

Build Model to Predict Customer Contract Renewal

Build a Model to Predict Customer Contract Renewal You are designing a model to predict whether an enterprise customer will renew a Google Meet contra...

Machine LearningSupervised LearningFeature Engineering
120
0
336 people solved
Jul 12, 2025
Palo Alto Networks logo
Palo Alto Networks
Hard
Software Engineer

Design an ML inference orchestration platform

System Design: ML Inference Orchestration Platform Context You are designing a multi-tenant platform that exposes several ML models as independent ser...

ML System Design
13
0
111 people solved
Sep 6, 2025
Akuna Capital logo
Akuna Capital
Medium
Software Engineer

Implement a two-user communications handler

One-at-a-time Two-User Communications Handler Context Design and implement a communications handler that supports exactly one active conversation at a...

System DesignLow-Level Design (OOP)Simulation & State Machines
27
0
188 people solved
Sep 6, 2025
TikTok logo
TikTok
Hard
Data Scientist

Investigate Declining ROI and Propose Effective Solutions

Investigate Declining ROI and Propose Effective Solutions E-commerce Ads Effectiveness and Diagnostics (Analytics & Experimentation) Context You are a...

Analytics & ExperimentationMetric DiagnosticsExperiment Design (A/B Testing)
18
0
130 people solved
Aug 4, 2025
Snowflake logo
Snowflake
Medium
Software Engineer

Compute task order and layered execution

You have N tasks labeled 0..N-1 and prerequisite pairs (a, b) meaning task a must complete before task b can start. Return any valid execution order o...

Coding & AlgorithmsGraphs
10
0
162 people solved
Sep 6, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Compare GCP vs AWS and testing strategy

Public Cloud Building Blocks, Compute Choice, and Testing Strategy Context Assume you are designing a new stateless HTTP microservice that exposes RES...

System Design
4
0
72 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Software Engineer

Solve frequency sort and all-pairs sum

Solve frequency sort and all-pairs sum Task 1 — Frequency-based string reorder: Given a string s containing ASCII characters, return a new string whos...

Coding & Algorithms
7
1
65 people solved
Jul 27, 2025
Amazon logo
Amazon
Medium
Software Engineer

Find minimum time for irrecoverable password

A password is a string s of length n. A virus attacks positions in a 1-indexed order given by a permutation attackOrder[1..n]. At second t (1 <= t <= ...

Coding & Algorithms
3
0
39 people solved
Sep 6, 2025
Luma logo
Luma
Hard
Software Engineer Locked

Design a Scalable Text-to-Speech Platform

Design a production text-to-speech platform for both interactive synthesis and long asynchronous jobs. Cover text normalization, model serving, stream...

ML System Design
2
0
14 people solved
May 25, 2026
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