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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

Describe Handling Unexpected Changes and Data-Driven Conflicts

Describe Handling Unexpected Changes and Data-Driven Conflicts This behavioral interview prompt assesses cultural fit, ownership, communication, adapt...

Behavioral & Leadership
29
0
133 people solved
Jul 12, 2025
TikTok logo
TikTok
Medium
Software Engineer

Compute waits and find distance-k node pairs

Part 1 — Array next-higher wait: Given an integer array A where A[i] is the measurement for day i (0-indexed), return an array W of the same length su...

Coding & Algorithms
4
0
46 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist

Evaluate emoji reactions launch

A messaging app plans to introduce an emoji reaction feature: users can long-press a message for 5 seconds and attach an emoji instead of sending a te...

Analytics & Experimentation
3
0
38 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Compare two ad insertion strategies

Ad Insertion Strategies for a 100-Post Feed You are evaluating two ad-insertion strategies on a feed with 100 posts: - Strategy A (Stochastic): Indepe...

Analytics & Experimentation
2
0
40 people solved
Oct 13, 2025
Meta logo
Meta
Hard
Data Scientist

Implement Clustered Sampling to Mitigate Network Effects in Testing

Implement Clustered Sampling to Mitigate Network Effects in Testing You are planning an A/B test for a new recommendation algorithm in a networked pro...

Analytics & Experimentation
26
0
115 people solved
Jul 12, 2025
Grindr logo
Grindr
Medium
Data Scientist

How would you evaluate causal lift and a paywall change?

Question You are interviewing for a Data Scientist role at a consumer subscription platform (a two-sided social/dating app) that also runs an advertis...

Analytics & Experimentation
7
0
60 people solved
Mar 5, 2026
Upstart logo
Upstart
Medium
Data Scientist Locked

Interpret A/B results with p-values and uncertainty

This question evaluates proficiency in statistical inference for A/B testing, covering confidence intervals, p-values, multiple-testing correction (Be...

Statistics & MathExperiment Analysis & ReadoutHypothesis Testing
6
0
126 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Software Engineer

Explain project choices, metrics, and AI usage

Behavioral / Project deep-dive You’ll be asked to walk through a recent project you worked on (preferably one with meaningful technical and business i...

Behavioral & LeadershipProject Deep DivePrioritization & Tradeoffs
9
0
84 people solved
Mar 1, 2026
Amazon logo
Amazon
Medium
Software Engineer

Compute fruit spoilage time in a grid

Given an m×n grid representing kitchen cells: 0 for empty, 1 for fresh fruit, and 2 for spoiled fruit. Each minute, any fresh fruit adjacent (up, down...

Coding & Algorithms
3
0
53 people solved
Jul 31, 2025
Meta logo
Meta
Medium
Data Scientist

Design Experiment to Evaluate New Video-Ad Effectiveness

Design an Experiment to Evaluate New Video-Ad Effectiveness A large consumer app is considering a new video-ad format with changes to UI, creative ren...

Analytics & Experimentation
85
0
56 people solved
Jul 12, 2025
Snapchat logo
Snapchat
Medium
Machine Learning Engineer Locked

Explain BatchNorm, optimizers, and L1/L2

This question evaluates a candidate's understanding of core machine learning fundamentals—Batch Normalization, optimizer behaviors (SGD, Momentum, RMS...

Machine LearningNeural Networks & TrainingML Fundamentals
9
0
111 people solved
Feb 11, 2026
Meta logo
Meta
Medium
Software Engineer

Compute left and right views once

Given the root of a binary search tree, output two lists: the nodes visible from the left side and the nodes visible from the right side, from top to ...

Coding & Algorithms
5
0
41 people solved
Sep 6, 2025
LinkedIn logo
LinkedIn
Medium
Software Engineer

Design a max-stack with efficient operations

Design a max-stack with efficient operations Design a stack that supports push (x), pop(), top(), peekMax(), and popMax(). The popMax operation must r...

Coding & AlgorithmsData Structure DesignStacks & Queues
12
0
100 people solved
Aug 8, 2025
Meta logo
Meta
Hard
Software Engineer

Design a bank system with transfers

Single-Process BankSystem: APIs, Data Model, Algorithms, and Edge Cases Context and Assumptions You are asked to design and implement a single-process...

System Design
6
0
87 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Data Scientist

Explain Algorithm's Disproportionate Impact on Demographic Segments

Explain Algorithm's Disproportionate Impact on Demographic Segments Ad-Ranking A/B Test: Interpreting Heterogeneous CTR Lifts Context You ran a standa...

Analytics & Experimentation
76
0
260 people solved
Aug 4, 2025
Instacart logo
Instacart
Medium
Data Scientist

Define what you seek next, with trade-offs

Behavioral & Leadership — Role Fit, Trade‑offs, and 90‑Day Fit Check (Data Scientist) Task Articulate what you need to thrive in your next Data Scient...

Behavioral & Leadership
5
0
84 people solved
Oct 13, 2025
NewsBreak logo
NewsBreak
Medium
Machine Learning Engineer

Walk through a key project

Walk through a key project Behavioral/Technical Prompt: Most Impactful Project Provide a concise, structured walkthrough of the most impactful project...

Behavioral & Leadership
9
0
78 people solved
Aug 9, 2025
Stripe logo
Stripe
Medium
Data Scientist Locked

Design a hierarchical forecast for transactions

Design an end-to-end daily forecast of gross merchandise volume for every country and industry segment over the next 90 days, with segment forecasts t...

Machine Learning
8
0
55 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Software Engineer

Determine equality after limited swaps

Question LeetCode 1790. Check if One String Swap Can Make Strings Equal Follow-up: Given two strings, determine if they can become anagrams of each ot...

Coding & Algorithms
12
0
26 people solved
Jul 29, 2025
Attentive logo
Attentive
Hard
Data Scientist

Explain switch to product analytics and company fit

Behavioral & Leadership Technical Screen (Attentive, Data Scientist) Context You are interviewing for a Data Scientist role where you are expected to ...

Behavioral & Leadership
4
0
40 people solved
Oct 13, 2025
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