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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.1k
Companies
579
Updated
10.10.2026
12.1k Questions 579 Companies10.10.2026
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
LinkedIn logo
LinkedIn
Medium
Software Engineer

Implement map and render to DOM

Build a Vanilla JS map-like Utility and DOM Renderer Context You are working in a basic browser environment with no frameworks or libraries. Implement...

Software Engineering Fundamentals
5
0
60 people solved
Sep 6, 2025
Oracle logo
Oracle
Medium
Software Engineer

Design a ride-sharing system (Uber)

Design a large-scale ride-sharing platform similar to Uber. Cover: - Rider and driver apps (account, availability, requesting rides). - Real-time driv...

System DesignGeo & Delivery SystemsReal-Time Systems
14
0
102 people solved
Jan 26, 2026
LinkedIn logo
LinkedIn
Hard
Data Scientist

Analyze homepage drop and feed ranking

You are interviewing for a product data science role at LinkedIn. Answer the following two product-sense questions. 1. Diagnose a drop in Home Page ->...

Analytics & Experimentation
5
0
73 people solved
Jan 17, 2026
Meta logo
Meta
Hard
Data Scientist

Design and critique teen-parent impact experiment

Causal Impact of Parental Registration on Teen Outcomes Meta plans to let parents register and link to their teen’s account. Leaders are concerned abo...

Analytics & Experimentation
4
0
45 people solved
Oct 13, 2025
Nio logo
Nio
Medium
Software Engineer Locked

Find kth smallest and count stair-climbing ways

This pair evaluates proficiency with order-statistics and selection algorithms for finding the k-th smallest element and with dynamic programming and ...

Coding & Algorithms
2
0
30 people solved
Jan 22, 2026
Meta logo
Meta
Medium
Data Engineer

Recommend two-hop follows in Python

Given a directed "follows" graph as a Python dict[str, list[str]], implement recommend_two_hop(graph, user) that returns the set (or a sorted list) of...

Data Manipulation (SQL/Python)Graphs
5
0
51 people solved
Aug 1, 2025
EliseAI logo
EliseAI
Medium
Data Scientist

Lease Renewal Prediction and Non-Renewal Reason Categorization Take-Home

This take-home gives you 24 hours of work, followed by a 30-minute presentation that serves as a research deep-dive on your approach. The objective is...

Machine LearningSupervised LearningFeature Engineering
0
0
7 people solved
Nov 2, 2025
Capital One logo
Capital One
Medium
Data Scientist

Describe Your Impactful Accomplishment and Learned Lessons

Describe Your Impactful Accomplishment and Learned Lessons Behavioral Interview Prompts (Capital One — Data Scientist) Context You are interviewing fo...

Behavioral & Leadership
6
0
88 people solved
Aug 4, 2025
Netflix logo
Netflix
Hard
Data Engineer Locked

Explain concurrency and reliability tradeoffs

This question evaluates skills in concurrent programming (thread-safety, synchronization primitives, memory visibility and lazy initialization) and di...

Software Engineering FundamentalsConcurrencyConsistency & Availability
6
0
78 people solved
Dec 13, 2025
Google logo
Google
Medium
Data Scientist

Evaluate College Impact on Income: Address Bias and Validity

Evaluating College Impact on Income with Observational Data You have an observational, cross-sectional dataset of 1,000 adult Mountain View residents....

Analytics & ExperimentationCausal InferenceRegression & Statistical Modeling
27
0
99 people solved
Jul 12, 2025
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
60 people solved
Oct 13, 2025
C3 AI logo
C3 AI
Hard
Data Scientist

Find longest substring with at least k repeats

Find longest substring with at least k repeats Longest substring where each character appears at least k times You are given: - a string s consisting ...

Coding & Algorithms
6
0
52 people solved
Aug 9, 2025
Atlassian logo
Atlassian
Medium
Data Scientist

Demonstrate motivation, feedback, and prioritization

Behavioral & Leadership STAR Prompts (Data Scientist — Technical Screen) Context: You are preparing for a Data Scientist technical screen at Atlassian...

Behavioral & Leadership
9
0
82 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Software Engineer Locked

Maximize score in 15-sum card game

This question evaluates algorithmic problem-solving in combinatorial search, state-space optimization, and memoization by asking for the maximum achie...

Coding & AlgorithmsDynamic Programming
10
0
121 people solved
Jan 18, 2026
DoorDash logo
DoorDash
Medium
Software Engineer

Find names similar by one swap

Question LeetCode 859. Buddy Strings – Given a target string and a list of strings, return all list entries that can match the target by swapping at m...

Coding & Algorithms
11
0
51 people solved
Jul 29, 2025
Meta logo
Meta
Medium
Data Scientist

Expected round of first selection in repeated sampling

Random Perk Selection: Expected First Round There are 1,000 employees. Each round, 10 distinct employees are selected at random for a perk. No one can...

Analytics & Experimentation
14
0
52 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Data Scientist

Calculate Average Session Length and Compare App Performance

user_sessions +---------+------------+------------+---------------------+---------------------+ | user_id | session_id | app | session_start ...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
127
0
336 people solved
Jul 12, 2025
Amazon logo
Amazon
Hard
Data Scientist

Evaluate RAG System Accuracy and Cost Control Strategies

Evaluate RAG System Accuracy and Cost Control Strategies Technical Phone Screen: LLM Pipelines, Knowledge Graphs, and RAG Context You are designing an...

Machine Learning
5
0
77 people solved
Aug 4, 2025
Hudson logo
Hudson
Medium
Software EngineerIntern

Design a Fixed-Size Memory Allocator with Correct Alignment

Design a fixed-size memory allocator backed by slabs and a linked free list. Explain allocation, deallocation, alignment, lifetime, corruption defense...

Software Engineering Fundamentals
1
0
19 people solved
May 5, 2025
Discord logo
Discord
Hard
Software Engineer

Explain C++ alignment and ABI stability

You are interviewing for a senior C++ / systems role. The interviewer asks two low-level fundamentals questions: 1. C++ memory alignment and padding ...

Software Engineering FundamentalsMemory ManagementProgramming Languages
12
0
92 people solved
Dec 8, 2025
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