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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
TikTok logo
TikTok
Hard
Machine Learning Engineer

Implement attention and nucleus sampling; compare to top-k

Implement Multi‑Head Attention and Nucleus (Top‑p) Sampling Context You are building core components used in Transformer-based language models. Implem...

Machine Learning
10
0
87 people solved
Aug 11, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Diagnose why average waiting time increased

Diagnose Why Average Waiting Time Increased You are a Data Scientist supporting DoorDash logistics. Over the last 1 to 2 weeks, the business metric av...

Analytics & ExperimentationMetric DiagnosticsData Quality & Validation
16
0
151 people solved
Jul 7, 2025
BetterHelp logo
BetterHelp
Medium
Data Scientist

Describe Your Most Challenging Data Project Experience

Describe Your Most Challenging Data Project Experience Behavioral: Walk Through a Technically Challenging Project (Technical Phone Screen) Context You...

Behavioral & Leadership
4
0
59 people solved
Aug 4, 2025
Coinbase logo
Coinbase
Medium
Data Scientist

Calculate Cumulative Sum for Each Integer in Table

numbers +-----+ | num | +-----+ | 1 | | 2 | | 13 | | 14 | | 15 | +-----+ Scenario You have a table containing one integer per row; for each row...

Data Manipulation (SQL/Python)
14
0
16 people solved
Jul 12, 2025
Anthropic logo
Anthropic
Hard
Software Engineer Locked

Optimize a core kernel for throughput

This question evaluates low-level performance optimization competencies, including loop transformations, memory-access patterns, vectorization, parall...

Software Engineering FundamentalsMemory Management
17
0
221 people solved
Nov 19, 2025
TikTok logo
TikTok
Easy
Data Scientist Locked

Explain Type I/II errors vs precision/recall

This question evaluates understanding of statistical hypothesis testing (Type I and Type II errors) and their relationship to binary classification me...

Statistics & Math
5
0
76 people solved
Nov 8, 2025
Apple logo
Apple
Medium
Data Scientist

Clarify status, education, and multi-role strategy

HR Screen: Candidate Information and Minicase Readiness (Data Scientist) 1) U.S. Work Authorization Provide your current employment/visa status and wo...

Behavioral & Leadership
12
0
86 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

[Analytical Reasoning] Comparing Two Newsfeed Ad Insertion Methods

Compare two ad-insertion methods for a 100-post newsfeed. Both methods have the same average ad load. - Method A: each post is independently replaced ...

Analytics & ExperimentationProbabilityExperiment Design (A/B Testing)
19
0
96 people solved
Apr 7, 2025
Stripe logo
Stripe
Medium
Data Scientist

Write SQL for snapshot features and labels

Use 'today' = 2025-09-01. Invented schema (UTC): users(u_id INT, signup_dt DATE, country STRING) events(u_id INT, event_time TIMESTAMP, arrival_time T...

Data Manipulation (SQL/Python)
2
0
22 people solved
Oct 13, 2025
Apple logo
Apple
Medium
Software Engineer

Explain your LLM project and contributions

Prior Experience Deep Dive (LLM) You mentioned you previously worked on an LLM-related research/project. Explain: - What problem you were trying to so...

Behavioral & LeadershipProject Deep DiveLLM Applications
9
0
93 people solved
Jan 17, 2026
Amazon logo
Amazon
Medium
Applied Scientist Locked

Approach an ambiguous business problem

This question evaluates a candidate's ability to handle ambiguity in ML system design by assessing skills in stakeholder communication, problem scopin...

ML System Design
3
0
46 people solved
Dec 20, 2025
NVIDIA logo
NVIDIA
Medium
Data Scientist

Sell GPUs to a retail CEO

Scenario: Pitching NVIDIA GPUs to Walmart’s CEO You are a data scientist preparing an executive-ready proposal to justify adopting NVIDIA GPUs across ...

Behavioral & LeadershipBusiness Case AnalysisCommunication & Stakeholders
8
0
100 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Identify P-Value Limitations and Complementary Approaches

Identify P-Value Limitations and Complementary Approaches A/B Testing: Limits of P-values and Better Decision Practices Scenario Your team is running ...

Statistics & Math
22
0
63 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Software Engineer

Design LCA and find K closest points

Part A — LCA with parent pointers: You are given two nodes a and b in a rooted tree where each node has a parent pointer (you may or may not have dire...

Coding & Algorithms
3
0
35 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist

Describe Handling Conflict and Providing Constructive Feedback

Describe Handling Conflict and Providing Constructive Feedback Behavioral & Leadership Interview Prompts (Data Scientist) Context You are interviewing...

Behavioral & Leadership
22
0
67 people solved
Aug 4, 2025
Netflix logo
Netflix
Medium
Data Scientist

Highlight Netflix Culture Principle in Past Work Example

Behavioral Interview: Netflix Culture Fit and Project Walkthrough Problem Statement You are interviewing for a Data Scientist role at Netflix. This is...

Behavioral & LeadershipProject Deep DiveMetrics & KPIs
11
0
118 people solved
Aug 4, 2025
NVIDIA logo
NVIDIA
Medium
Software Engineer

Parse a deeply nested JSON

Parse a deeply nested JSON Given a JSON document with approximately five levels of nesting, write code to traverse it and extract specified fields whi...

Data Manipulation (SQL/Python)Parsing & Interpreters
6
0
101 people solved
Aug 7, 2025
Worldquant logo
Worldquant
Medium
Data Scientist

Solve a Three-Roll Optimal Stopping Game

Solve a Three-Roll Optimal Stopping Game A fair six-sided die may be rolled at most three times. After each of the first two rolls, stop and receive t...

Statistics & Math
2
0
21 people solved
Feb 26, 2025
Fidelity logo
Fidelity
Medium
Software Engineer

Compare Spring and Spring Boot

Compare Spring and Spring Boot What are the differences between Spring Framework and Spring Boot? Compare configuration approaches, auto-configuration...

Coding & Algorithms
6
0
69 people solved
Jul 31, 2025
Amazon logo
Amazon
Hard
Data Scientist

Design causal study for reminder impact

Observational Causal Study: Reminder Program With Staggered Market × Channel Launch Context You are evaluating the causal impact of medication-subscri...

Analytics & Experimentation
7
0
67 people solved
Oct 13, 2025
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