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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
Meta logo
Meta
Medium
Machine Learning Engineer Locked

Solve Merge Lists and Vertical Traversal

This question evaluates proficiency with merging sorted linked lists and performing vertical traversal of binary trees, focusing on algorithms, data s...

Coding & Algorithms
8
0
60 people solved
Feb 28, 2026
Meta logo
Meta
Medium
Data Scientist

Label new vs old users over time in SQL

Define users as “new” during the first 30 days inclusive after their signup_date, and “old” thereafter. Produce per-user, per-day labels over a window...

Data Manipulation (SQL/Python)
1
1
15 people solved
Oct 13, 2025
Two Sigma logo
Two Sigma
Medium
Data Scientist Locked

Compute robust linear interpolation with edge cases

Derive the linear interpolant through two points given in either order, evaluate it at a query, and rewrite it as a convex combination. Define a rule ...

Statistics & MathMath & Number Theory
8
0
90 people solved
Oct 13, 2025
Tubi logo
Tubi
Medium
Data Scientist

Explain p‑values to a product manager

Interpreting a Two-Sided A/B Test p-value of 0.03 You ran a two-sided A/B test on conversion rate. Results: - Baseline (control) conversion: 5.0% - Ob...

Statistics & Math
4
0
65 people solved
Oct 13, 2025
TikTok logo
TikTok
Medium
Machine Learning Engineer Locked

Explain FlashAttention, KV cache, and RoPE

This question evaluates understanding of transformer attention optimizations (FlashAttention), autoregressive decoding state management (KV cache), an...

Machine LearningTransformers & AttentionLLM Inference & Serving
7
0
119 people solved
Jan 22, 2026
Amazon logo
Amazon
Easy
Data Scientist

Explain core ML concepts and metrics

You are interviewing for a Data Scientist role. Answer the following ML fundamentals questions clearly and concisely. Concepts 1. Explain the bias–var...

Machine LearningML FundamentalsModel Evaluation
11
0
102 people solved
Oct 11, 2025
Snapchat logo
Snapchat
Hard
Software Engineer Locked

Implement a size-bounded LRU cache

This question evaluates a candidate's ability to design and implement efficient data structures for capacity-bound caching, focusing on handling varia...

Coding & Algorithms
4
0
61 people solved
Jan 2, 2026
Thumbtack logo
Thumbtack
Medium
Data Scientist

Design cross-validation; explain bias–variance

Define cross-validation rigorously and compare k-fold, stratified k-fold, leave-one-out, nested CV, and time-series rolling/blocked CV. For a dataset ...

Statistics & Math
10
0
80 people solved
Oct 13, 2025
Natoora logo
Natoora
Medium
Data Analyst Locked

Justify Using LLMs for Reporting

This question evaluates a candidate's ability to justify tool selection and system design for LLM-driven reporting, assessing competencies in LLM inte...

Machine Learning
3
0
58 people solved
Mar 4, 2026
Goldman Sachs logo
Goldman Sachs
Medium
Product Manager

Behavioral Decision-Making & Growth

Behavioral PM Prompt: Decision-Making and Growth in a Regulated Domain You are interviewing for a Product Manager role in a regulated, data-heavy doma...

Behavioral & Leadership
6
0
49 people solved
Jul 4, 2025
Meta logo
Meta
Medium
Data Scientist

Evaluate Impact of Increasing Stranger Content in Feeds

Evaluate Impact of Increasing Stranger Content in Feeds Feed-Ranking Strategy: Friends vs. Stranger Content Background A personalized feed currently m...

Analytics & Experimentation
5
0
55 people solved
Aug 4, 2025
Meta logo
Meta
Hard
Machine Learning Engineer

Design scalable media storage and delivery

System Design: Global UGC Photos and Short Videos Store/Delivery Context Design a globally distributed system to store and deliver user-generated phot...

System Design
9
0
62 people solved
Sep 6, 2025
Capital One logo
Capital One
Medium
Data Scientist

Describe handling an urgent ad-hoc request

Behavioral Prompt: Urgent, Unscheduled Analytics Request (STAR) You are interviewing for a Data Scientist role and are asked to provide a STAR-formatt...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
9
0
114 people solved
Oct 13, 2025
Point72 logo
Point72
Medium
Quantitative Researcher

Model Trading Frictions in Portfolio Optimization

Model Trading Frictions in Portfolio Optimization Extend a single-period statistical-arbitrage objective to reflect real trading frictions. Describe u...

Statistics & Math
1
0
13 people solved
Jun 7, 2025
Amazon logo
Amazon
Hard
Data Scientist

Root-cause an incident and drive consensus

Root-Cause Plan: Sudden Drop in Voice Checkout Conversion (Alexa Shopping) You are informed that the "voice checkout conversion" KPI for Alexa Shoppin...

Behavioral & Leadership
9
0
70 people solved
Oct 13, 2025
Medium
Data Scientist

Interpret p=0.10 rigorously

A/B Test on Monthly Churn: Inference, Power, and Testing Choices You ran a 28-day A/B test to reduce monthly churn among subscribers, randomizing 150,...

Statistics & Math
4
0
43 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Design a large-scale temperature sensor system

This question evaluates system design and distributed-systems competencies including large-scale data ingestion, time-series storage, real-time visual...

System DesignSystem Design FundamentalsData Ingestion & CDC
10
0
98 people solved
Jan 6, 2026
Amazon logo
Amazon
Medium
Data Scientist

Design Incremental Load Process for Large Relational Table

orders_daily_load +------------+-----------+-------------+--------+ | load_date | order_id | customer_id | amount | +------------+-----------+------...

Data Manipulation (SQL/Python)
87
0
231 people solved
Jul 12, 2025
Meta logo
Meta
Hard
Data Scientist

Navigate reschedules, offers, and team-match uncertainty

Behavioral + Due Diligence + Risk Management (Data Scientist — Onsite) Context You are a Data Scientist candidate approaching an onsite. You are juggl...

Behavioral & Leadership
10
0
73 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Applied Scientist

Implement SGD for linear regression and derive gradients

Prompt You are given a dataset of \(n\) 1D samples \(\{(x_i, y_i)\}_{i=1}^n\), where \(x_i\) and \(y_i\) are real numbers. We want to fit a linear mod...

Machine LearningML CodingRegression & Statistical Modeling
11
0
120 people solved
Dec 15, 2025
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