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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
Amazon logo
Amazon
Hard
Software Engineer Locked

Find Longest Activatable Server Streak

This question evaluates array algorithm skills, specifically recognition of sliding-window or two-pointer techniques and reasoning about time and spac...

Coding & Algorithms
5
0
53 people solved
Apr 15, 2026
Yahoo logo
Yahoo
Medium
Data Scientist

Investigate Yahoo Mail's 10% DAU Decline Causes

Investigate Yahoo Mail's 10% DAU Decline Causes Yahoo Mail suddenly reports a 10% decline in daily active users. You need to investigate whether the d...

Analytics & Experimentation
32
0
125 people solved
Jul 12, 2025
Amazon logo
Amazon
Hard
Software Engineer

Design locker allocation service

Design a Best-Fit Locker Assignment Component Context You are designing the locker-assignment component for a Locker OS used at physical locker banks ...

System Design
5
0
81 people solved
Sep 6, 2025
Salesforce logo
Salesforce
Medium
Software Engineer

Implement 64-bit modular exponentiation safely

Implement a function to compute (a^b) mod m where 0 ≤ a,b < 2^61−1 and 1 ≤ m < 2^61−1 using only 64-bit operations without overflow. Provide implement...

Coding & AlgorithmsMath & Number TheoryBit Manipulation
14
0
124 people solved
Jul 31, 2025
Netflix logo
Netflix
Medium
Software Engineer Locked

Solve sliding-window and disjoint-string-pairs tasks

This question evaluates proficiency in string-processing algorithms, sliding-window techniques, efficient set or bitmask representations, and combinat...

Coding & AlgorithmsTwo Pointers & Sliding WindowBit Manipulation
31
0
301 people solved
Mar 1, 2026
Kneron logo
Kneron
Medium
Software Engineer

Count IoT devices matching date and threshold

Implement function numDevices(statusQuery, threshold, dateStr) that returns the number of IoT devices from a paginated REST API that were added in the...

Data Manipulation (SQL/Python)
3
0
36 people solved
Jul 26, 2025
Meta logo
Meta
Medium
Software Engineer

Find Kth Largest and Tree Ancestors

In a technical phone interview, the candidate was asked two coding problems in the same round: 1. K-th largest element in an array Given an unsorte...

Coding & Algorithms
3
0
62 people solved
Feb 22, 2026
Amazon logo
Amazon
Medium
Data Scientist

Determine Length of Longest Unique Substring

Scenario Online assessment: coding portion that follows the SQL questions. Question Implement a function that, given a string s, returns the length of...

Coding & Algorithms
7
0
54 people solved
Aug 4, 2025
Airbnb logo
Airbnb
Medium
Software Engineer

Compute minimum-cost service cover

You are given: ( 1) a list of rental service packages, where each package contains a set of services (strings) and a non-negative price, e.g., [(["wif...

Coding & AlgorithmsDynamic Programming
28
0
223 people solved
Jul 26, 2025
Uber logo
Uber
Medium
Software Engineer Locked

Design a meeting scheduler and shopping cart

This question evaluates system design skills across distributed systems, API design, data modeling, indexing, caching, concurrency control, consistenc...

System DesignSystem Design FundamentalsStorage & Sharding
38
0
552 people solved
Mar 1, 2026
Instacart logo
Instacart
Hard
Software EngineerSenior+ Locked

Implement store, evaluator, and parser

This question evaluates implementation skills in data structures and algorithms, covering time-based versioning and TTL in an in-memory key-value stor...

Coding & AlgorithmsKey-Value StoresParsing & Interpreters
13
0
114 people solved
Jan 29, 2026
Tesla logo
Tesla
Hard
Machine Learning Engineer

Design an LLM math-solving chain

Design an LLM math-solving chain Design an LLM-Based Arithmetic Solver Context You are building an LLM-driven service that answers arithmetic question...

ML System DesignLLM ApplicationsPrompt Engineering
25
0
202 people solved
Jul 26, 2025
Meta logo
Meta
Medium
Data Scientist

Analyze Conversation Engagement and Reaction Usage Effectively

messages +-----------+--------+----------+--------------+---------------------+ | messageid | sender | receiver | has_reaction | timestamp |...

Data Manipulation (SQL/Python)
176
3
432 people solved
Jul 12, 2025
Amazon logo
Amazon
Medium
Software Engineer Locked

Design a Perishable-Goods Inventory and Location Tracking System

This system design question evaluates the ability to architect a location-tracking and inventory service for perishable goods across a distributed ret...

System Design
5
0
72 people solved
Jun 13, 2026
Amazon logo
Amazon
Medium
Applied Scientist Locked

Design an advertiser metrics tracking platform

This question evaluates object-oriented design competencies such as domain modeling, class responsibilities and relationships, service interfaces, ext...

Software Engineering FundamentalsLow-Level Design (OOP)Distributed Transactions & Idempotency
26
0
178 people solved
May 30, 2026
Meta logo
Meta
Medium
Data Scientist

Rank Ads by Conversion Rate for Top 10 Performers

ad id | advertiser_id | created_at 1 | 101 | 2023-07-01 2 | 102 | 2023-07-05 3 | 101 | 2023-07-10 ​ impression id | a...

Data Manipulation (SQL/Python)
3
0
22 people solved
Aug 4, 2025
Amazon logo
Amazon
Hard
Software Engineer

Maximize total bandwidth of data channel pairs

You are optimizing how information flows through a network of processing nodes. There are n processing nodes. The bandwidth capability of the i-th nod...

Coding & Algorithms
5
0
66 people solved
Oct 1, 2025
ByteDance logo
ByteDance
Medium
Software EngineerSenior+

Build a validated add-sub calculator

Given a string expression, write a function that validates and evaluates it. The expression represents arithmetic using only non-negative integers and...

Coding & Algorithms
9
0
71 people solved
Feb 18, 2026
Credit Genie logo
Credit Genie
Hard
Software Engineer

Integrate Chroma and design semantic search API

System Design: Add Semantic Search to an Existing CRUD Service Using Chroma Context You own a document CRUD service (create/read/update/delete) that s...

ML System Design
5
0
94 people solved
Sep 6, 2025
ByteDance logo
ByteDance
Medium
Software Engineer

Solve Search Speed and String Product

You are asked to solve two coding problems. Problem 1: Find the Minimum Constant Processing Speed You are given an array piles, where piles[i] is the ...

Coding & Algorithms
1
0
17 people solved
Jan 26, 2026
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