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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.0k
Companies
569
Updated
10.05.2026
12.0k Questions 569 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
Software Engineer

Implement tree column grouping and minimal parentheses fixes

Part A — Binary tree column grouping: Given the root of a binary tree, group node values by their vertical columns from leftmost to rightmost using x-...

Coding & Algorithms
5
0
47 people solved
Aug 13, 2025
Uber logo
Uber
Medium
Frontend Engineer Locked

Simulate a Rank-Based Tournament

This question evaluates ability to simulate tournament pairing and single-elimination progression using array manipulation and data structures while p...

Coding & Algorithms
2
0
34 people solved
May 4, 2026
Uber logo
Uber
Hard
Data Scientist

Design an RCT for app-open discount

Design an RCT for an "X dollars off on app open" promotion in a two‑sided marketplace Context You operate a two‑sided marketplace mobile app (e.g., ri...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
7
0
117 people solved
Oct 13, 2025
Yahoo logo
Yahoo
Medium
Data Scientist

Merge words by head-tail chaining

Given a list of lowercase words, merge them into a single string by repeatedly chaining words where the last character of the current string equals th...

Coding & Algorithms
6
0
51 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Describe handling conflict and a proud project

Behavioral interview prompts: 1. Tell me about a time you had a conflict with a teammate (e.g., disagreement on design, priorities, or code quality). ...

Behavioral & LeadershipConflict & CollaborationProject Deep Dive
12
0
87 people solved
Jan 14, 2026
Point72 logo
Point72
Medium
Data Scientist

Convert integer dates to quarters

Given an 8-digit integer date_key in YYYYMMDD (e.g., 20240331), write: (a) a SQL expression and (b) a Python function that convert it to a quarter lab...

Data Manipulation (SQL/Python)
1
0
13 people solved
Oct 13, 2025
HBO logo
HBO
Medium
Data Scientist

Implement Director awards with Python OOP

Python OOP Exercise: Director extends Cast Context You are working with a simple class hierarchy where Director extends Cast. Implement a robust, test...

Coding & Algorithms
2
0
41 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Easy
Software Engineer Locked

Evaluate a Four-Operator Expression

This question evaluates expression-evaluation skills such as operator precedence, integer arithmetic semantics (truncating division), and string parsi...

Coding & Algorithms
2
0
37 people solved
Jan 4, 2026
Meta logo
Meta
Hard
Data Scientist

Prove friends outperform unconnected; design metrics, observational analysis, and rollout experiment

Question You are given two event tables, info_stream_views (one row per viewer–post view, with viewer_id, post_id, relationship ∈ {friend, unconnected...

Analytics & Experimentation
6
0
78 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Evaluate Chatbot's Retailer Value and Launch Viability

Evaluate Chatbot's Retailer Value and Launch Viability Scenario You are evaluating whether to launch a B2C chatbot for retailers on a commerce messagi...

Analytics & Experimentation
2
0
55 people solved
Aug 4, 2025
Wtw logo
Wtw
Easy
Data Scientist Locked

Explain normal distribution and standardize it

This question evaluates understanding of the Gaussian (normal) distribution and the concept of standardization, assessing competencies in probability ...

Machine Learning
1
0
25 people solved
Jan 22, 2026
TikTok logo
TikTok
Hard
Data Scientist

Test 15s to 60s video length change

Experiment Design: Change Default Creator Video Length from 15s to 60s Context You are designing an A/B test for a short‑form video platform with two ...

Analytics & Experimentation
8
0
73 people solved
Oct 13, 2025
TikTok logo
TikTok
Easy
Software Engineer Locked

Solve three classic coding problems

These tasks evaluate algorithmic problem-solving, data structure mastery, and implementation skills within the Coding & Algorithms domain, touching on...

Coding & Algorithms
5
0
43 people solved
Dec 24, 2025
Capital One logo
Capital One
Medium
Data Scientist

Show help, mistake recovery, and achievement

Behavioral & Leadership (Technical Screen) Answer all three parts below with concrete metrics, trade-offs, and decision rationale. Assume a Data Scien...

Behavioral & Leadership
5
0
64 people solved
Oct 13, 2025
Airtable logo
Airtable
Medium
Software Engineer Locked

Design a scalable search service with sharding

This question evaluates understanding of search system architecture, including indexing, querying, and sharding strategies, and measures competency in...

System DesignSearch & Feed SystemsPartitioning & Consistent Hashing
12
0
243 people solved
Jan 22, 2026
Atlassian logo
Atlassian
Medium
Machine Learning Engineer Locked

Design O(1) cache and moving average

This question evaluates proficiency in data structures and streaming algorithms by combining an O(1) cache design with an eviction policy and a fixed-...

Coding & Algorithms
6
0
71 people solved
Jan 22, 2026
Medium
Data Scientist

Compute p-values and adjust multiplicity

You test if a coin is fair after 20 flips and observe 17 heads. (a) Compute the exact two-sided p-value under a Binomial(20, 0.5) model. (b) Approxima...

Statistics & Math
7
0
51 people solved
Oct 13, 2025
Medium
Data Scientist

Manipulate data efficiently in Python

Answer the following: (a) Contrast list comprehensions and generators with respect to memory and evaluation; write a generator that yields rolling win...

Data Manipulation (SQL/Python)
1
0
14 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Data Scientist

Assess Leadership Through Disagreement, Failure, and Risk Examples

Assess Leadership Through Disagreement, Failure, and Risk Examples Behavioral Leadership Deep-Dive (Data Scientist Onsite) Scenario A leadership-princ...

Behavioral & Leadership
45
0
192 people solved
Aug 4, 2025
Figma logo
Figma
Medium
Data Scientist

Describe impact, prioritization, and stakeholder management

Describe impact, prioritization, and stakeholder management Behavioral interview (Hiring Manager) You are interviewing for a data/ML role. Answer the ...

Behavioral & LeadershipProject Deep DiveMetrics & KPIs
19
0
133 people solved
Jul 25, 2025
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