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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."

Blind 75Free
Showing 20 results
Intuit logo
Intuit
Medium
Data Scientist

Compute churn and revenue churn in SQL

You receive monthly end-of-month subscription snapshots and must compute August-2025 churn metrics. Schema and sample data: Table: subscription_monthl...

Data Manipulation (SQL/Python)
4
0
35 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Medium
Software EngineerSenior+

Explain your most impactful project clearly

Technical Communication / Behavioral Describe the project you worked on that had the largest measurable impact. The interviewer asks you to: 1. Whiteb...

Behavioral & LeadershipProject Deep DiveSystem Design Fundamentals
12
0
109 people solved
Oct 13, 2025
Credit Genie logo
Credit Genie
Medium
Software Engineer

Introduce yourself and show mission alignment

Behavioral & Leadership: Self-Intro and API/Collaboration Scenarios Context You are interviewing for an ML Engineer role at a consumer fintech startup...

Behavioral & Leadership
11
0
84 people solved
Sep 6, 2025
Instacart logo
Instacart
Medium
Software Engineer

Pivot transactions by date without date libs

Given a stream of transaction rows (shopper_id, date_str, amount) where date_str is ISO format 'YYYY-MM-DD', produce a pivoted report for a specified ...

Data Manipulation (SQL/Python)
3
0
28 people solved
Sep 6, 2025
Amazon logo
Amazon
Medium
Data Scientist

Implement robust word counts and min/max

You receive a 50GB UTF-8 text corpus on disk. Implement a Python solution that:\n- Streams the file without loading it fully into memory.\n- Counts ca...

Data Manipulation (SQL/Python)Arrays & StringsProgramming Languages
10
0
99 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Product Manager

Amazon Fit, Motivation & Leadership Principles

Amazon Product Manager Fit, Motivation, and Leadership Principles Prepare for an Amazon Product Manager behavioral onsite focused on motivation, role ...

Behavioral & Leadership
10
0
86 people solved
Jul 4, 2025
Lyft logo
Lyft
Easy
Software Engineer

Validate a Binary Search Tree Iteratively

Problem Determine whether a binary tree is a valid binary search tree. Every value in a node's entire left subtree must be smaller than the node value...

Coding & Algorithms
3
1
46 people solved
Apr 14, 2026
Optiver logo
Optiver
Medium
Data Scientist

Compute expected coin flips to meet on octagon

Compute expected coin flips to meet on octagon Meeting Time on a Random Walk Around an Octagon Problem Two independent particles start at opposite ver...

Statistics & MathPuzzles & BrainteasersProbability
7
0
123 people solved
Jul 17, 2025
TikTok logo
TikTok
Hard
Software Engineer

Improve and measure service performance

Assessing and Improving a Service’s Performance Under High Load Context You are responsible for a user-facing, stateless HTTP microservice that handle...

System Design
5
0
78 people solved
Sep 6, 2025
Meta logo
Meta
Hard
Software EngineerNew Grad

Determine Whether a String Can Be Segmented into Dictionary Words

Problem Given a string and a set of words, return whether the entire string can be formed by concatenating dictionary words. A dictionary word may be ...

Coding & Algorithms
2
0
27 people solved
Dec 21, 2025
TikTok logo
TikTok
Hard
Data Scientist

Decide launch of downranking suspected bad sellers

Experiment Design: Downranking Suspected Bad Sellers in Search Context - You are designing a decision framework and online experiment to test penalizi...

Analytics & Experimentation
5
0
58 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Evaluate Instagram's Short-Video Recommender System Success

Evaluate Instagram's Short-Video Recommender System Success Instagram is launching a short-video recommender feed. You are asked to choose metrics, re...

Analytics & ExperimentationMetrics & KPIsExperiment Design (A/B Testing)
112
0
437 people solved
Jul 12, 2025
Arista logo
Arista
Easy
Software Engineer

Find missing value in sorted consecutive array

Given a sorted array nums of distinct integers. The numbers are supposed to form a consecutive sequence starting from some unknown integer start: - If...

Coding & Algorithms
6
0
74 people solved
Oct 4, 2025
Meta logo
Meta
Medium
Software EngineerSenior+

Handle conflict and missed delivery deadlines

Answer behavioral questions covering: 1. Conflict: Describe a time you had significant conflict with a teammate/stakeholder. What caused it, what did ...

Behavioral & Leadership
8
0
73 people solved
Feb 11, 2026
Google logo
Google
Hard
Data Scientist

Find companies similar to a given client

System Design: Retrieve Top-20 Most Similar Companies for Sales Prospecting You are given an anchor client (e.g., The Coca‑Cola Company). Design a sys...

Machine LearningRetrieval & Candidate GenerationEmbeddings & Vector Search
15
0
116 people solved
Oct 13, 2025
Elastic logo
Elastic
Medium
Software Engineer

Implement log aggregation in React

React Coding: Log stream aggregation You are building a small React feature that displays real-time statistics from a log stream. Log event format Eac...

Coding & Algorithms
10
0
78 people solved
Nov 13, 2025
LinkedIn logo
LinkedIn
Medium
Data Scientist

Device Status without Timestamps

Table: article_views article_id INT author_id INT viewer_id INT view_dt DATE Count authors who have never viewed any of their own articles. On 20...

Data Manipulation (SQL/Python)
12
0
57 people solved
Apr 26, 2025
Capital One logo
Capital One
Hard
Data Scientist

Optimize amusement park pricing, capacity, and testing

Context You are interviewing for a Data Scientist role focused on analytics and experimentation. An amusement park is considering launching a paid Fas...

Analytics & ExperimentationExperiment Design (A/B Testing)Business Case Analysis
10
0
102 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Hard
Data Scientist

Diagnose cold-food spike and design experiments

Cold Food Complaints: Metrics, Diagnosis, and Experiment Design Context and assumptions: - You are analyzing a spike in “food arrived cold” complaints...

Analytics & ExperimentationMetric DiagnosticsExperiment Analysis & Readout
16
0
133 people solved
Oct 13, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design a risk management ticketing system

Design a Risk Management Ticketing System Context You are designing a ticketing platform used by human users (analysts, managers, admins) and an autom...

System Design
6
0
69 people solved
Sep 6, 2025
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