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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

Calculate Shop Visibility Ranking in Search Results

shop_impressions +------------+---------+----------+--------+ | date | shop_id | position | clicks | +------------+---------+----------+--------...

Data Manipulation (SQL/Python)
2
0
19 people solved
Aug 4, 2025
Meta logo
Meta
Hard
Software EngineerNew Grad

Insert a Value into a Sorted Circular Linked List

Problem A sorted circular singly linked list is encoded as an array cycleValues in the order encountered while traversing once from the supplied head....

Coding & Algorithms
1
0
21 people solved
Dec 21, 2025
Meta logo
Meta
Medium
Data Scientist

Compute unread and multi-account user percentages

You’re given two tables. Write ANSI-SQL to answer parts (a)–(d). Treat a notification as unread if read_at IS NULL. Denominator for user-level percent...

Data Manipulation (SQL/Python)SQLMetrics & KPIs
14
0
91 people solved
Oct 13, 2025
PayPal logo
PayPal
Hard
Data Scientist

Assess card transactions and plan risk strategy

Assess card transactions and plan risk strategy Card Fraud Decisions and Cold‑Start Risk Strategy Context You are designing the first version of card ...

Analytics & Experimentation
5
0
72 people solved
Jul 31, 2025
OPPO logo
OPPO
Medium
Data Engineer

Solve three SQL problems (easy/medium/hard)

Answer the following SQL tasks of increasing difficulty: 1) Aggregation: Given Orders(order_id, customer_id, amount, order_date), return each customer...

Data Manipulation (SQL/Python)
2
0
32 people solved
Aug 14, 2025
Meta logo
Meta
Medium
Data Scientist

Size opportunity for new product line

An e-commerce site considers adding a "Home Office" product line. Before any A/B test, size the opportunity and recommend whether to proceed. Assumpti...

Analytics & Experimentation
7
0
63 people solved
Oct 13, 2025
TikTok logo
TikTok
Easy
Data Scientist

Maximize watched duration under consecutive-sum limit

You have a list of videos in a feed. Video i has duration d[i] (positive integer). A user has an “attention span” limit A. You want to select a subset...

Coding & AlgorithmsDynamic Programming
12
0
101 people solved
Jan 17, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Design a content moderation platform

Design a large-scale content moderation system for a short-video platform. Users can upload videos, captions, comments, audio, and other metadata. The...

ML System DesignSystem Design FundamentalsAI Safety & Alignment
15
0
107 people solved
Feb 18, 2026
NVIDIA logo
NVIDIA
Medium
Software Engineer

Design an IR for test workflows

Design an IR for test workflows Design an intermediate representation (IR) for a graphics testing workflow as a DAG. Define node/edge types, metadata,...

Software Engineering Fundamentals
6
0
75 people solved
Aug 9, 2025
Kneron logo
Kneron
Medium
Software Engineer

Compute sum of minima with removals

Compute sum of minima with removals You are given an array weights[0..n-1] of positive integers representing product weights in a line. Repeat until n...

Coding & Algorithms
3
0
33 people solved
Jul 26, 2025
Klaviyo logo
Klaviyo
Hard
Software Engineer

Design banking with scheduled transfers and merges

Design banking with scheduled transfers and merges In-Memory Banking System with Scheduled Payments and Account Merges Design and implement a single-t...

System DesignData Structure DesignSimulation & State Machines
19
0
137 people solved
Jul 15, 2025
Uber logo
Uber
Medium
Data Scientist

Evaluate Email Subject Line Performance Using Hypotheses

Email Subject Line A/B Test: Hypotheses, CLT, and Sample Size An email marketing team wants to evaluate whether a new subject line improves click-thro...

Statistics & Math
18
0
90 people solved
Jul 12, 2025
Uber logo
Uber
Medium
Data Scientist

Design airport dispatch with ETA uncertainty

You control airport pickups with streaming ETAs for arriving flights and live driver locations/queues. Design an online dispatch algorithm that minimi...

Coding & AlgorithmsGeo & Delivery SystemsGraphs
16
0
112 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Scientist

Determine Metrics to Evaluate Notification Impact on Users

Determine Metrics to Evaluate Notification Impact on Users Facebook sends several types of push notifications and is considering a new notification th...

Analytics & Experimentation
15
0
55 people solved
Jul 12, 2025
Apple logo
Apple
Hard
Data Scientist

Implement random forest with OOB and imbalance

Implement a Memory-Efficient Random Forest (Binary Classification) Under Constraints You are asked to design and implement a Random Forest for binary ...

Machine Learning
7
0
82 people solved
Oct 13, 2025
DoorDash logo
DoorDash
Medium
Data Scientist

Compute sample sizes and error control

Using the Biker experiment context, compute required sample sizes and describe error control under practical constraints. Show formulas and numeric an...

Statistics & MathExperiment Design (A/B Testing)Hypothesis Testing
11
0
95 people solved
Oct 13, 2025
Disney logo
Disney
Medium
Data Scientist

Solve matrix add, frequency count, longest consecutive

You are asked to solve the following 3 coding tasks (in any language). Implement each as a function. 1) Add two matrices Input: Two 2D integer arrays ...

Coding & Algorithms
8
0
57 people solved
Sep 13, 2025
Bloomberg logo
Bloomberg
Medium
Software Engineer

Check near-palindrome with one deletion

Given a string s, determine if it can become a palindrome after deleting at most one character. Return true or false and provide time and space comple...

Coding & Algorithms
7
0
76 people solved
Sep 6, 2025
Microsoft logo
Microsoft
Medium
Software Engineer Locked

Stream output until stop token appears

This question evaluates streaming string processing and pattern-matching skills, specifically handling token detection across chunk boundaries, bounda...

Coding & AlgorithmsString Algorithms
19
0
203 people solved
Feb 12, 2026
Coinbase logo
Coinbase
Easy
Data Scientist

Compute probability at least one user uses feature

Problem Assume there are \(n\) users. Each user independently uses a certain feature with probability \(p\). 1) What is the probability that at least ...

Statistics & Math
7
0
69 people solved
Sep 20, 2025
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