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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
569
Updated
10.02.2026
11.9k Questions 569 Companies10.02.2026
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
Medium
Data Scientist

Handle unprofessional, prescriptive interviewers

You are mid-interview on a time-boxed SQL screen where the interviewer forbids JOINs and insists on window functions only, interrupts with a personal ...

Behavioral & Leadership
3
0
29 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Software Engineer

Answer key behavioral prompts effectively

Prepare responses for these behavioral prompts: 1. Proudest project: Describe the project you’re most proud of and why. 2. Conflict: Tell me about a t...

Behavioral & Leadership
2
0
31 people solved
Oct 21, 2025
Meta logo
Meta
Easy
Data Scientist

Posterior probability given model accuracy

Security Classification: Posterior Probability When Flagged You are evaluating a binary classifier that flags potentially bad users. Assume: - Base ra...

Analytics & Experimentation
8
0
40 people solved
Jul 12, 2025
Uber logo
Uber
Hard
Data Scientist

Define market-only rider experience metrics

Market-only Rider Experience Metrics and Market Balance Index (MBI) You are designing a metric suite for a rides marketplace where "rider experience" ...

Analytics & ExperimentationMetrics & KPIs
12
0
88 people solved
Oct 13, 2025
Robinhood logo
Robinhood
Hard
Data Scientist

Diagnose sustained drop in executed trades

Brokerage Analytics Troubleshooting: Trades Per Active User Down 22% Context You are the analyst for a brokerage product that spans onboarding through...

Analytics & ExperimentationMetric DiagnosticsExperiment Design (A/B Testing)
12
0
101 people solved
Oct 13, 2025
SoFi logo
SoFi
Medium
Software Engineer

Describe Project and Collaboration Stories

Prepare behavioral interview answers for the following prompts: 1. Tell me about a project you found especially interesting. 2. Describe a story invol...

Behavioral & LeadershipProject Deep Dive
9
0
119 people solved
Oct 1, 2025
Boston Consulting Group logo
Boston Consulting Group
Medium
Data Scientist

Query top spenders and 7-day growth

Assume 'today' = 2025-09-01. Write a SQL query to: (1) for each model, compute total revenue in the last 7 days (2025-08-26 to 2025-09-01 inclusive) a...

Data Manipulation (SQL/Python)
1
0
17 people solved
Oct 13, 2025
Meta logo
Meta
Easy
Machine Learning Engineer Locked

Solve four OA string/array/matrix/graph tasks

This multi-part prompt evaluates proficiency in core programming competencies: string parsing and character classification, simulation/greedy processi...

Coding & AlgorithmsArrays & StringsGrids & Matrices
12
0
93 people solved
Feb 12, 2026
Meta logo
Meta
Medium
Software Engineer

Find top-K frequent elements in a stream

You receive a large stream of items (e.g., integers or strings) that may not fit in memory. Design an algorithm that can return the top K most frequen...

Coding & AlgorithmsBatch & Stream Processing
9
0
85 people solved
Feb 25, 2026
Flatiron Health logo
Flatiron Health
Medium
Data Scientist

Write SQL window functions for streaks

Assume today is 2025-09-01. Using standard SQL (e.g., PostgreSQL), answer the following using window functions only (no procedural loops, no correlate...

Data Manipulation (SQL/Python)
3
0
25 people solved
Oct 13, 2025
Uber logo
Uber
Hard
Data Scientist

Design an A/B test; choose Z vs T

A/B Test on a Signup Funnel: Sample Size, Test Choice, Sequential Design, and Causal Plan Context You are planning a two-variant A/B test on a signup ...

Statistics & Math
10
0
87 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Data Scientist Locked

Model overdispersed counts; estimate treatment lift

This question evaluates modeling and inference for overdispersed, zero‑inflated count data, including estimation of treatment lift (rate ratios), disp...

Statistics & Math
5
0
48 people solved
Oct 13, 2025
Shopify logo
Shopify
Medium
Data Scientist Locked

Optimize attempts in a timed logic test

This question evaluates a candidate's understanding of expected value, time-constrained optimization, efficiency metrics (score per second), and discr...

Statistics & Math
6
0
77 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist Locked

Measure notification impact and set guardrails

This question evaluates causal inference, experiment design, metric specification and attribution, statistical power calculation, and long-term monito...

Analytics & Experimentation
2
0
22 people solved
Oct 13, 2025
Uber logo
Uber
Medium
Data ScientistIntern

Design Rideshare Marketplace Causal Analyses

You are a data scientist at a ride-hailing marketplace. Answer the following case prompts as if you were advising product, operations, and marketplace...

Analytics & Experimentation
3
0
29 people solved
Feb 18, 2026
Uber logo
Uber
Medium
Software Engineer Locked

Compute time for virus to infect grid

This question evaluates a candidate's ability to reason about grid-based state propagation, algorithmic problem solving, and performance consideration...

Coding & AlgorithmsGrids & Matrices
24
0
186 people solved
Feb 12, 2026
Meta logo
Meta
Medium
Data Scientist Locked

Decide event notification launch via experiments

This question evaluates a data scientist's competency in experimentation design, causal inference under network interference, metric engineering, and ...

Analytics & Experimentation
3
0
42 people solved
Oct 13, 2025
Oracle logo
Oracle
Easy
Data ScientistIntern Locked

Count closed islands in a grid

This question evaluates grid traversal and connected-component detection skills, focusing on 4-directional adjacency and boundary-condition reasoning ...

Coding & Algorithms
10
0
72 people solved
Feb 18, 2026
Pinduoduo logo
Pinduoduo
Medium
Software Engineer Locked

Design a Recency-Eviction Cache

This question evaluates proficiency with data structures and algorithmic design for implementing a fixed-capacity key-value cache that enforces recenc...

Coding & Algorithms
6
0
45 people solved
Feb 21, 2026
ByteDance logo
ByteDance
Hard
Machine Learning Engineer

Count Special Subarrays by Modular Frequency

You are given an integer array nums, and two integers modulo and target, where 0 <= target < modulo. Call an index i special if nums[i] % modulo == ta...

Coding & Algorithms
1
0
13 people solved
Oct 8, 2025
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