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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
Meta logo
Meta
Medium
Software Engineer

Solve windowed duplicates and target expression

1) Windowed duplicate check: Given an integer array nums and an integer k, determine whether there exist indices i and j such that nums[i] == nums[j] ...

Coding & Algorithms
5
0
56 people solved
Aug 13, 2025
Spokeo logo
Spokeo
Medium
Data Scientist

Design a Controlled TV-Advertising Experiment for Sign-Ups

Design a Controlled TV-Advertising Experiment for Sign-Ups Controlled TV Advertising Experiment: Incremental Website Sign-ups Context You are asked to...

Analytics & Experimentation
5
0
41 people solved
Aug 4, 2025
Google logo
Google
Medium
Data Scientist

Sample and Simulate Price Adjustments in R with dplyr

Products +----+-----------+-------+ | id | product | price | | 1 | phone | 500 | | 2 | tablet | 300 | | 3 | laptop | 1000 | | 4 |...

Data Manipulation (SQL/Python)
77
0
200 people solved
Jul 12, 2025
Meta logo
Meta
Medium
Software Engineer Locked

Implement fast power and k-palindrome

This question evaluates numerical algorithm design and string algorithm skills, focusing on efficient exponentiation with negative exponents and deter...

Coding & Algorithms
7
0
56 people solved
Apr 1, 2026
Moody's logo
Moody's
Medium
Software Engineer Locked

Return Binary Search Tree Values in Ascending Order

Decode a breadth-first binary-search-tree representation and return every stored value in nondecreasing order. This task evaluates precise deserializa...

Coding & Algorithms
0
0
8 people solved
Jul 25, 2026
OneMain Financial logo
OneMain Financial
Medium
Data Scientist

Implement an LRU cache with O(1) ops

Design and code an LRU cache supporting get(key) and put(key, value) in O(1) average time with capacity N. Specify your data structures, handle update...

Coding & Algorithms
8
0
60 people solved
Oct 13, 2025
LinkedIn logo
LinkedIn
Medium
Data Scientist

How do you lead and drive impact?

You are interviewing for a senior or tech-lead data scientist role. Prepare to answer the following behavioral prompts with concrete examples from you...

Behavioral & Leadership
4
0
63 people solved
Oct 12, 2025
Virtu Financial logo
Virtu Financial
Medium
Data Scientist

Compute probability in urn with green returns

Compute probability in urn with green returns Urn Sampling with Replacement for Greens Only You have an urn with colored balls. You repeatedly draw on...

Statistics & Math
3
0
70 people solved
Aug 1, 2025
TikTok logo
TikTok
Medium
Data Scientist

Implement K-means and run two iterations

Given points P={(0,0),(0,2),(2,0),(2,2),(8,8),(8,10),(10,8),(10,10)} and k=2, (1) initialize centroids with k-means++ using seed=42 and Euclidean dist...

Coding & Algorithms
6
0
70 people solved
Oct 13, 2025
Walmart Labs logo
Walmart Labs
Medium
Data Scientist

Understand Propensity Score Matching in Business Analytics

Understand Propensity Score Matching in Business Analytics Propensity Score Matching (PSM) in Observational Product Data Context You work on a growth ...

Statistics & Math
4
0
56 people solved
Aug 4, 2025
Google logo
Google
Hard
Software Engineer

Navigate conflict, difficult people, and culture issues

Answer the following behavioral questions with clear examples (preferably using the STAR method: Situation, Task, Action, Result). Be explicit about y...

Behavioral & Leadership
5
0
49 people solved
Jan 4, 2026
Meta logo
Meta
Medium
Software Engineer

Solve tree leaf sum and target indices search

Question LeetCode 129. Sum Root to Leaf Numbers LeetCode 2089. Find Target Indices After Sorting Array (array already sorted; require O(log n) time) h...

Coding & Algorithms
9
0
46 people solved
Jul 29, 2025
Adobe logo
Adobe
Medium
Software Engineer

Design an Extensible Tree Traversal Library

Question Design a reusable tree-traversal library that supports preorder, inorder, postorder, and level-order traversal. Callers supply their own acti...

Software Engineering Fundamentals
1
0
12 people solved
Apr 19, 2026
Dropbox logo
Dropbox
Medium
Software Engineer Locked

Build a hit/miss word guessing game

This question evaluates implementation skills in managing stateful systems and data structures for pattern matching, as well as algorithmic and advers...

Coding & AlgorithmsLow-Level Design (OOP)Simulation & State Machines
9
0
175 people solved
Jan 22, 2026
Amazon logo
Amazon
Hard
Data Scientist

Evaluate concession gift-card policy with DID

Evaluate a Gift-Card Concession Pilot (Causal Impact with Staggered Adoption) Context Several regions piloted a policy: when a shipment is lost or dam...

Analytics & Experimentation
7
0
86 people solved
Oct 13, 2025
Meta logo
Meta
Medium
Data Engineer

Answer DE behavioral and ramp-up questions

Answer the following behavioral questions for a Data Engineer (or data-focused full-stack) role. Provide specific examples. 1. Project under a tight d...

Behavioral & LeadershipOwnership & ExecutionConflict & Collaboration
7
0
87 people solved
Mar 1, 2026
H
Hot Agent Startup
Medium
Software Engineer

Find High-Intensity Time Periods

Given a list of time-series readings, where each reading is {timestamp, intensity}, and a numeric threshold, return all maximal time periods during wh...

Coding & Algorithms
1
0
15 people solved
Apr 3, 2026
Snapchat logo
Snapchat
Medium
Software Engineer

Implement binary search for boundary index

Given a sorted integer array nums (length n) and an integer target t, return the index of the first element in nums that is greater than or equal to t...

Coding & Algorithms
9
0
76 people solved
Sep 6, 2025
Yahoo logo
Yahoo
Medium
Data Scientist

Evaluate Widget Impact on User Engagement with A/B Testing

Evaluate Widget Impact on User Engagement with A/B Testing A/B Test Design: New In‑App Recommendation Widget Scenario A company is preparing to roll o...

Analytics & Experimentation
3
0
48 people solved
Aug 4, 2025
Uber logo
Uber
Medium
Data Scientist

Write SQL for fares and age-band counts

You have two tables. Schema: - drivers(driver_id VARCHAR PRIMARY KEY, name VARCHAR, date_of_birth DATE) - trips(trip_id VARCHAR PRIMARY KEY, driver_id...

Data Manipulation (SQL/Python)SQL
4
1
51 people solved
Oct 13, 2025
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