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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
18.6k
Companies
980
Updated
11.12.2026
18.6k Questions 980 Companies11.12.2026
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
Microsoft logo
Microsoft
Medium
Product Manager

Walk Through Your Personal LLM Tool Stack and Defend Each Choice

Tell me about the AI tools in your own workflow: which large language models or agents do you rely on, and why those over the alternatives? `hint Orga...

Product Design & StrategyAI Product Management
1
0
8 people solved
Jun 30, 2026
Google logo
GoogleMetaAmazon
Easy
Software Engineer

Return the Sign of an Array's Product

Problem For the product of all integers in nums, return 1 when it is positive, -1 when negative, or 0 when zero. The full product does not need to be ...

Coding & AlgorithmsMath & Number Theory
1
0
8 people solved
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Design a Software Load Balancer

Design an L4 or L7 software load balancer and discuss load-balancing policies and backend health checks.

System Design
5
0
41 people solved
Aug 14, 2026
Oracle logo
Oracle
Medium
Software EngineerSenior+ Locked

Find the Lexicographically Maximum Suffix

Return the lexicographically greatest nonempty substring of a lowercase string with up to 400,000 characters. Respect standard prefix ordering without...

Coding & Algorithms
7
0
61 people solved
Aug 21, 2026
Optiver logo
Optiver
Medium
Software Engineer

Optiver Beat The Odds: Five Rapid-Fire Probability Brainteasers (Dice, Cards, Coins, Pigeonhole)

You are taking a timed online quantitative assessment (in the style of Optiver's "Beat The Odds" test). It consists of rapid-fire probability question...

Software Engineering FundamentalsProbabilityPuzzles & Brainteasers
43
0
588 people solved
Dec 18, 2025
OpenAI logo
OpenAI
Hard
Software Engineer

Design a CI/CD pipeline with scheduler

Design a production-grade CI/CD pipeline (with its job scheduler) You are designing the internal CI/CD platform for a large engineering organization t...

System DesignJob Scheduling & WorkflowsCI/CD & Deployment
126
0
1700 people solved
Aug 13, 2025
Lead Bank logo
Lead Bank
Medium
Software Engineer

Implement a versioned hash map with snapshot

VersionedHashMap (time-travel key-value store) Design and implement a data structure VersionedHashMap<K, V> backed by a hash map that supports retriev...

Coding & AlgorithmsData Structure DesignKey-Value Stores
16
0
223 people solved
Feb 12, 2026
Google logo
GoogleMetaMicrosoft

Also asked at Microsoft, Bloomberg, Amazon

Medium
Software Engineer

Fewest Insertions When Each Opening Requires a Consecutive Closing Pair

Problem A balanced string is empty,a concatenation of balanced strings,or "("+A+"))" for balanced A. Thus each opening parenthesis must be matched by ...

Coding & AlgorithmsGreedyStacks & Queues
0
0
10 people solved
Gong logo
Gong
Medium
Software EngineerSenior+

Design a Service That Captures Zoom Meeting Recordings and Processes Them at Scale

Design the system that brings meeting data from Zoom into your product and processes it. When a recorded meeting ends, the system must obtain the reco...

System DesignFile & Media StorageDistributed Transactions & Idempotency
0
0
11 people solved
Aug 25, 2026
Brex logo
Brex
Medium
Software Engineer

Debug and Explain Fixes

Given a small codebase with failing unit tests, identify the root causes of the failures, fix the bugs, and explain the defects you found. Add minimal...

Coding & AlgorithmsDebugging
36
0
613 people solved
Aug 14, 2025
Google logo
Google
Easy
Software Engineer Locked

Count Rectangle Coverage on a Grid

Apply many inclusive rectangular increments to a square grid and return the final coverage count for every cell. The exercise emphasizes upper-bound e...

Coding & AlgorithmsGrids & Matrices
73
3
596 people solved
Jul 21, 2026
Imc logo
Imc
Easy
Hardware Engineer Locked

Choose Between Two Machines and Allocate Work from Performance Curves

Choose between two machine types using latency-throughput curves, request shape, batching, queueing, cost, and service objectives. The solution covers...

System Design
3
0
65 people solved
Aug 24, 2026
Anduril logo
AndurilGoogleMeta

Also asked at Meta, Bloomberg, Microsoft, Amazon

Medium
Software Engineer

Resolve Simultaneous Left and Right Domino Pushes

Problem dominoes contains L and R for initial left/right pushes and . for upright dominoes. Every second, a falling domino pushes its upright neighbor...

Coding & AlgorithmsSimulation & State MachinesTwo Pointers & Sliding Window
1
0
12 people solved
OpenAI logo
OpenAI
Medium
Software Engineer

Design Video Generation Orchestration

Design a scalable system to orchestrate AI video generation (think Sora-style text-to-video). Users submit text prompts to generate videos. For each s...

System DesignJob Scheduling & WorkflowsDistributed Transactions & Idempotency
43
1
614 people solved
Jun 12, 2026
Amazon logo
AmazonGoogleMeta

Also asked at Meta, Microsoft, Infosys, Bloomberg, Goldman Sachs, Uber

Medium
Software Engineer

Increase Values to Maximize One Frequency

Problem In one operation, increment an entry of nums by one. Use at most k operations and return the greatest achievable frequency of any value. `cpp ...

Coding & AlgorithmsTwo Pointers & Sliding WindowSorting
0
0
7 people solved
Geico logo
Geico
Medium
Software Engineer

Design a Real-Time EV Charging Station Reservation System for a City

Design a reservation system for the electric-vehicle charging stations of a city. Drivers see which chargers are available and reserve one in real tim...

System DesignSystem Design FundamentalsReal-Time Systems
0
0
3 people solved
Sep 20, 2026
Waymo logo
Waymo
Medium
Data Scientist

Implement a Safe Average Function in Python

Write a Python function average(table) that returns the arithmetic mean of a list of numbers and returns 0 when the list is empty. Explain the functio...

Data Manipulation (SQL/Python)
18
0
174 people solved
Mar 14, 2026
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, Bloomberg, Netflix

Medium
Software Engineer

Measure a Shared Contiguous Array Block

Problem Return the greatest length of a contiguous block occurring in both nums 1 and nums 2. A subsequence with gaps does not qualify. `cpp class Sol...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings
1
0
14 people solved
Instacart logo
Instacart
Medium
Software Engineer

Design Idempotent In-App Availability and Due-Date Notifications

Add a notification service to an existing web application. It must provide in-app notifications when an item becomes available and reminders related t...

System DesignDistributed Transactions & IdempotencyMessaging & Event-Driven
4
0
42 people solved
Sep 7, 2026
Google logo
Google
Hard
Software EngineerSenior+ Locked

Design a Task Scheduler for Opaque Long-Running GPU Jobs ("Design Sora")

This system design question evaluates a candidate's ability to architect a distributed job scheduler and orchestrator for expensive, long-running, GPU...

System DesignJob Scheduling & WorkflowsGPU Infrastructure
114
0
782 people solved
Jun 14, 2026
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