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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
Meta logo
Meta
Medium
Data Scientist

Define and analyze new-vs-existing activity

Ambiguous product question: Are existing users more active than new users over the last 28 days (ending today = 2025-09-01)? 1) Propose two reasonable...

Data Manipulation (SQL/Python)Metrics & KPIsSegmentation & Cohort Analysis
4
0
70 people solved
Oct 13, 2025
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Defend MSE over MAE for car prices

Choosing MSE vs. MAE for Car Price Regression (Unscaled USD Target) You are training a regression model to predict car prices in USD. The target varia...

Statistics & MathRegression & Statistical Modeling
14
0
101 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Easy
Data Scientist

Improve biker delivery with metrics and levers

Case: Optimize Delivery Performance for Bike Couriers You are a Data Scientist at a food-delivery marketplace such as DoorDash or Uber Eats. Your team...

Analytics & ExperimentationMetrics & KPIsData Quality & Validation
13
0
97 people solved
Jul 1, 2025
Google logo
Google
Hard
Data Scientist

Measure outage impact; choose fix vs build

End-to-End Analysis Plan: Investigating Frequent Google Meet Call Drops Context A major enterprise customer reports frequent Google Meet call drops. A...

Analytics & Experimentation
10
0
73 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Machine Learning Engineer

Compute binary tree left-side view

Given a binary tree, return the values visible from the left side when looking from top to bottom. If multiple nodes exist at the same depth, the left...

Coding & Algorithms
5
0
65 people solved
Sep 6, 2025
Rippling logo
Rippling
Medium
Software Engineer Locked

Design personalized news aggregation service

The question evaluates the ability to design a large-scale personalized content delivery system, testing competencies in distributed systems architect...

System DesignSearch & Feed SystemsPersonalization
9
0
87 people solved
Oct 4, 2025
Waymo logo
Waymo
Medium
Software Engineer Locked

Design a Global Small-Image Caching Service

Design a globally distributed cache for small images backed by one authoritative database and hundreds of thousands of reads per second. Cover cache h...

System Design
3
0
61 people solved
May 13, 2026
Amazon logo
Amazon
Medium
Software Engineer

Compute unique visitors by department

You have two tables: products(product_id, department, category, subcategory) where department > category > subcategory form a parent–child hierarchy, ...

Data Manipulation (SQL/Python)
2
0
27 people solved
Jul 26, 2025
SoFi logo
SoFi
Medium
Software Engineer

Design a key-value store with getLast

Design a key-value store with getLast Design and implement an in-memory key–value store with this API: add(key, value), get(key), remove(key), and get...

Coding & AlgorithmsData Structure DesignLinked Lists
12
0
94 people solved
Jul 15, 2025
Capital One logo
Capital One
Hard
Data Scientist

Prioritize six improvements for a favorite app

Case Prompt: Product Thinking, Modeling, and Experimentation Choose one consumer mobile app you personally use weekly. 1. Propose exactly six concrete...

Behavioral & LeadershipProduct Design & ImprovementPrioritization & Tradeoffs
4
0
92 people solved
Oct 13, 2025
Google logo
Google
Hard
Software Engineer

Delete a Node From a Search Tree

Given the root of a binary search tree and an integer key, delete the node whose value equals key if it exists. Return the possibly new root while pre...

Coding & Algorithms
12
1
85 people solved
Apr 29, 2025
TikTok logo
TikTok
Medium
Data Scientist

Compute and rank top bad advertisers

SQL on ad safety. Assume the following schema and sample rows. Use ANSI SQL. Today is 2025-09-01; interpret “last 7 days” as 2025-08-26 00:00:00 to 20...

Data Manipulation (SQL/Python)
3
0
18 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer

Implement tree left/right views via BFS and DFS

Given a binary tree, output the left view and right view: for each depth, the first node visible from the left and the first node visible from the rig...

Coding & Algorithms
3
0
54 people solved
Aug 13, 2025
Meta logo
Meta
Hard
Software EngineerSenior+

Design a content processing service

System Design: High-Throughput Content Processing Service Context Design a content processing and moderation service for a large-scale media app. Cont...

System Design
5
0
58 people solved
Sep 6, 2025
Meta logo
Meta
Hard
Machine Learning Engineer

Discuss Projects, Failures, and Growth

Prepare structured answers for the following behavioral prompts from an interview: - Describe the project you are most proud of. - What was the hardes...

Behavioral & LeadershipProject Deep DiveConflict & Collaboration
17
0
134 people solved
Jan 30, 2026
Meta logo
Meta
Hard
Data Scientist

Replace legacy ads model safely

Facebook Ads Ranking Replacement: M0 to M1 You are asked to replace a legacy ads ranking model (M0) with a new model (M1) in a large-scale feed ads sy...

Machine Learning
8
0
59 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Compute posterior for accurate-but-rare classifier

Bayes' Theorem: Interpreting Screening Model Predictions Context You are evaluating a binary screening model that flags "bad" users in a population. T...

Statistics & Math
6
0
56 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Hard
Data Scientist

Handle unreliable email during time-critical coordination

Scheduling Under Email Deliverability Risk: 72-Hour Action Plan and Escalation Scenario You must schedule a critical Data Scientist technical screen w...

Behavioral & Leadership
9
0
70 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Software Engineer

Explain gap and project contributions

Behavioral/Technical Screen: Recent Work and Project Deep-Dive Context You are in a technical screen for a Software Engineer role. The interviewer wan...

Behavioral & LeadershipProject Deep DiveMotivation & Fit
9
0
101 people solved
Sep 6, 2025
Citadel logo
Citadel
Medium
Data Scientist

Determine When a Quadratic Has Finite Minimum

Consider the unconstrained real-valued optimization problem \[ \min_{x \in \mathbb{R}^n} f(x) = x^\top Qx + c^\top x, \] where \(Q \in \mathbb{R}^{n \...

Machine Learning
9
0
115 people solved
Feb 17, 2026
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