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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
12.2k
Companies
569
Updated
10.14.2026
12.2k Questions 569 Companies10.14.2026
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
Voleon logo
Voleon
Hard
Machine Learning EngineerSenior+

Explain the Bellman Equation

Explain the Bellman Equation State and explain the Bellman expectation and optimality equations. Show how they decompose value into immediate reward a...

Machine Learning
2
0
33 people solved
Jul 31, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design an End-to-End ML System

Design an End-to-End ML System System Design: Real-Time Recommendation ML System Context You are tasked with designing an end-to-end machine-learning ...

ML System DesignML Data Pipelines & Feature StoresRanking Models
14
0
159 people solved
Aug 4, 2025
Bobyard logo
Bobyard
Medium
Software Engineer

Design comments and async image generation

The system design portion combined two prompts: 1. Design a full-stack comment system with frontend, backend, and database support for create, read, u...

System Design
4
0
48 people solved
Apr 9, 2026
Capital One logo
Capital One
Medium
Software Engineer

Solve string merge and grid path tasks

Question Given two equal-length strings s1 and s2, create a new string by iterating i = 0 … n-1, comparing s1[i] with s2[n-1-i]: append s1[i]; if the ...

Coding & AlgorithmsArrays & StringsGraphs
81
0
168 people solved
Jul 29, 2025
Parafin logo
Parafin
Hard
Software Engineer

Design a loan application system

Design a loan application system System Design: End-to-End Online Loan Application Platform Context Design a small online lending platform where appli...

System DesignSystem Design FundamentalsPrivacy & Compliance
33
1
403 people solved
Jul 31, 2025
Snapchat logo
Snapchat
Medium
Software Engineer Locked

Implement a custom list with iterator and map

This question evaluates proficiency in data structures and generic collection implementation, specifically list operations, iterator semantics, and hi...

Coding & AlgorithmsData Structure DesignProgramming Languages
9
0
97 people solved
Mar 1, 2026
Scale AI logo
Scale AI
Medium
Machine Learning Engineer

Implement universal adversarial attack on GPT-2

Robustness Evaluation: Universal Adversarial Prompts for GPT-2 You are in a Machine Learning Engineer interview. Explain how you would build a control...

Machine LearningAI Safety & AlignmentLLM Evaluation
22
0
218 people solved
Jul 8, 2025
TikTok logo
TikTok
Medium
Software Engineer

Implement O(1) randomized multiset

Implement O(1) randomized multiset Write code for a data structure that supports add(x), remove(x), and getRandom() in average O( 1) time where duplic...

Coding & Algorithms
4
0
64 people solved
Jul 17, 2025
TCS logo
TCS
Hard
Data Scientist

Compare Tableau blending, joins, and filters

Tableau Integration Exercise: Joins vs Blends, Filters, and Order of Operations Data You have two sources. Primary (Orders) - Columns: OrderID, State,...

Analytics & ExperimentationBI & Reporting SystemsSQL
15
0
124 people solved
Oct 13, 2025
Tesla logo
Tesla
Medium
Software Engineer

Find latency pairs with minimal difference

Given an array of integers representing network latencies, return all increasing pairs [a, b] such that b − a equals the minimal absolute difference b...

Coding & Algorithms
8
0
82 people solved
Jul 26, 2025
Google logo
Google
Medium
Software Engineer Locked

Simulate room assignments for scheduled meetings

This question evaluates scheduling and event-simulation skills, including time-ordered processing, resource allocation with tie-breaking, and efficien...

Coding & AlgorithmsIntervals & SchedulingHeaps & Priority Queues
19
0
177 people solved
Jan 6, 2026
LinkedIn logo
LinkedIn
Medium
Software Engineer

Design a stack with max removal

Design a stack-like data structure for integers that supports the following operations efficiently: - push(x): insert x onto the stack. - pop(): remov...

Coding & Algorithms
7
0
92 people solved
Jan 1, 2026
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Determine and print expression to reach target

You are given four numbers and a target T (e.g., 24). Using +, −, ×, ÷ and parentheses, and using each number exactly once, determine whether you can ...

Coding & Algorithms
6
0
69 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Product Analyst

Write SQL for call analytics

You are given two tables. Table: calls - call_id BIGINT - sender_id BIGINT - receiver_id BIGINT - call_ts TIMESTAMP — stored in UTC - pickup CHAR(1) —...

Data Manipulation (SQL/Python)SQL
6
0
66 people solved
Jan 16, 2026
Capital One logo
Capital One
Medium
Data Scientist

Audit flight data quality from metadata

You’re given an airline on‑time dataset and a one‑page “Metadata” slide that claims: flight_date (string, local time), dep_time/arr_time (HHMM local),...

Data Manipulation (SQL/Python)
2
0
28 people solved
Oct 13, 2025
Airbnb logo
Airbnb
Medium
Software Engineer

Solve palindrome pairs and key path

Question LeetCode 336. Palindrome Pairs; LeetCode 864. Shortest Path to Get All Keys https://leetcode.com/problems/palindrome-pairs/description/ https...

Coding & Algorithms
13
0
51 people solved
Aug 4, 2025
Coinbase logo
Coinbase
Medium
Data Scientist

Write SQL and Python for funnels/retention

Given the following schema and small samples, answer Parts A–C. Assume timestamps are UTC and "today" is 2025-09-01. Schema: users(id INT, country STR...

Data Manipulation (SQL/Python)
2
0
23 people solved
Oct 13, 2025
Amazon logo
Amazon
Medium
Software EngineerIntern

Describe failure, conflict, metrics, and AI lessons

The interview included several behavioral prompts with deep follow-up questions. Prepare clear STAR-style stories for the following: - Tell me about a...

Behavioral & LeadershipFailure & LearningConflict & Collaboration
5
0
79 people solved
Oct 31, 2025
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
9 people solved
Jul 25, 2026
Capital One logo
Capital One
Medium
Data Scientist

Compute gala vs online break-even donors

A nonprofit must choose one of two fundraising options. Option A (Gala): capacity 100 attendees; fixed cost $20,000; variable cost $100 per attendee. ...

Statistics & Math
10
0
82 people solved
Oct 13, 2025
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