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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
570
Updated
09.07.2026
12.0k Questions 570 Companies09.07.2026
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

Compare Instagram and Facebook Stories Using Key Performance Metrics

Compare Instagram and Facebook Stories Using Key Performance Metrics Scenario You are a data scientist tasked with quantitatively comparing the succes...

Analytics & Experimentation
2
0
50 people solved
Aug 4, 2025
Meta logo
Meta
Medium
Data Scientist

Build Trust Quickly with New Team Stakeholders

Build Trust Quickly with New Team Stakeholders This behavioral prompt assesses cross-functional collaboration for a data scientist role. The interview...

Behavioral & Leadership
18
0
94 people solved
Jul 12, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Count friend requests based on age rules

Problem You are given an array ages, where ages[i] is the age of the i-th person. A person of age A will send a friend request to a person of age B if...

Coding & AlgorithmsTwo Pointers & Sliding WindowSorting
16
0
134 people solved
Dec 15, 2025
Snowflake logo
Snowflake
Medium
Data ScientistSenior+

Build a cohort dashboard with Streamlit and SQL

You are given three tables and asked to build a minimal Streamlit app that helps a PM explore weekly cohort retention and ARPU by country. Assume SQL ...

Data Manipulation (SQL/Python)
2
0
16 people solved
Oct 13, 2025
Microsoft logo
Microsoft
Medium
Machine Learning Engineer Locked

Explain a project deeply

This question evaluates a candidate's ability to communicate technical ownership, system architecture, decision-making, and operational problem-solvin...

Software Engineering Fundamentals
4
0
61 people solved
Feb 23, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Solve interval merging and histogram area

The coding round included two algorithm problems: 1. Merge overlapping intervals: Given a list of closed intervals [[start1, end1], [start2, end2], .....

Coding & Algorithms
6
0
77 people solved
Feb 18, 2026
Instacart logo
Instacart
Medium
Data Scientist

Justify Instacart fit and leaving your role

Behavioral HR Screen — Data Scientist Prompt Why Instacart specifically (vs. DoorDash/Uber Eats or your current company)? - Identify 2–3 Instacart pro...

Behavioral & Leadership
6
0
59 people solved
Oct 13, 2025
A
Art Advisors
Medium
Software Engineer Locked

Solve common array/graph interview problems

This multi-part question evaluates proficiency in array and matrix manipulation, graph traversal and shortest-path reasoning for word transformations,...

Coding & Algorithms
1
0
36 people solved
Jan 12, 2026
PayPal logo
PayPal
Medium
Data Scientist

Explain Challenging Project and Decision-Making Process

Explain Challenging Project and Decision-Making Process Behavioral Deep Dive: Most Challenging Project Context Technical/phone screen for a Data Scien...

Behavioral & Leadership
6
0
70 people solved
Aug 4, 2025
Meta logo
Meta
Hard
Data Scientist

Design experiment for unconnected content in feed

Analytics & Experimentation Case: Socialness of Friends vs Unconnected Content Context You work on a personalized feed that shows posts from friends a...

Analytics & Experimentation
4
0
39 people solved
Oct 13, 2025
TikTok logo
TikTok
Hard
Data Engineer

Count islands using BFS without modifying grid

You are given an m x n binary grid grid where: - 1 represents land - 0 represents water - Islands are groups of horizontally or vertically adjacent la...

Coding & AlgorithmsGrids & MatricesGraphs
9
0
99 people solved
Oct 19, 2025
Hulu logo
Hulu
Medium
Data ScientistSenior+ Locked

Design and Monitor a Multi-Country Parameter Experiment

Prepare for experimentation questions spanning sample size, duration, variance reduction, multi-arm parameter tuning, sequential monitoring, and cross...

Analytics & Experimentation
1
0
12 people solved
Jun 7, 2026
Meta logo
Meta
Medium
Data Scientist Locked

How to test account ranking change

This question evaluates a data scientist's competency in causal inference, experimentation design, metrics selection, and observational analysis using...

Analytics & Experimentation
5
1
73 people solved
Mar 16, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Find max distance between alive tree nodes

Find max distance between alive tree nodes Given a binary tree, define alive nodes. Base case: alive nodes are the leaves. Find the maximum distance (...

Coding & Algorithms
8
0
71 people solved
Jul 28, 2025
Attentive logo
Attentive
Hard
Data Scientist

Investigate SMS delivery-rate drop at Attentive

Triage and Validation Plan: US SMS Delivery-Rate Drop Context On March 10 from 20:00–22:00 ET, the US SMS delivery rate (Delivered/Attempted) dropped ...

Analytics & Experimentation
3
0
54 people solved
Oct 13, 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
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
LinkedIn logo
LinkedIn
Medium
Data Scientist

Evaluate an email test with confounding

Evaluate an Email Test With Confounding A marketing team tested Email A and Email B across two cities, San Francisco and New York, over two weeks. The...

Analytics & Experimentation
4
0
51 people solved
Jul 8, 2025
TikTok logo
TikTok
Easy
Software Engineer Locked

Plan QA testing for a new feature

This question evaluates competency in QA test planning, test strategy and prioritization, cross-functional coordination with development and product, ...

Software Engineering Fundamentals
4
0
54 people solved
Feb 12, 2026
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
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