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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
CVS Health logo
CVS Health
Easy
Software EngineerSenior+

Design a Public API for Hundreds of Daily External Users

Design a public API that hundreds of external users will use every day. The API's business domain is intentionally unspecified. Explain the requiremen...

System DesignAPI DesignAuthentication & Authorization
0
0
12 people solved
Jul 25, 2026
Amazon logo
AmazonSpotifyWhatnot

Also asked at Whatnot, Google, Uber

Medium
Software Engineer

Most Widely Shared Three-Visit Website Pattern

Problem Parallel arrays username, timestamp and website describe visits. A pattern is an ordered list of three websites, which may repeat. Its score i...

Coding & AlgorithmsArrays & StringsSorting
1
1
14 people solved
Snowflake logo
Snowflake
Medium
Software Engineer Locked

Prune a Multiway Tree to a Maximum Depth

Given a rooted multiway tree as a parent array, return the minimum explicit subtree deletions needed to keep every remaining node within a maximum dep...

Coding & AlgorithmsTreesGreedy
20
0
291 people solved
Aug 15, 2026
ByteDance logo
ByteDance
Medium
Site Reliability EngineerSenior+ Locked

How You Build Service Stability and Troubleshoot Production Incidents

A senior site reliability engineering question asking how the candidate makes production services stable and how they troubleshoot an incident when on...

Software Engineering FundamentalsReliability & SRECI/CD & Deployment
6
0
48 people solved
Sep 5, 2026
Rillet logo
Rillet
Medium
Backend Engineer Locked

Distribute Annual Revenue Across Twelve Months

Allocate an annual revenue amount in cents evenly across twelve months without floating-point arithmetic. Preserve the total exactly and assign any re...

Coding & Algorithms
13
0
125 people solved
May 12, 2026
Snowflake logo
Snowflake
Medium
Software Engineer

Serialize a List of Arbitrary Strings into One String and Back, Then Compare Schemes

Two components exchange data over a channel that carries exactly one string per message. You need to send a whole list of strings through it: the send...

Software Engineering FundamentalsParsing & Interpreters
2
0
32 people solved
Sep 11, 2026
Citadel logo
Citadel
Hard
Software Engineer

Design a low-latency trading system

System Design: Low-Latency Electronic Trading Platform (Equities) You are designing a single-region electronic trading platform (exchange/ATS-like) th...

System DesignTrading SystemsDistributed Transactions & Idempotency
164
0
1706 people solved
Aug 9, 2025
Capital One logo
Capital One
Medium
Product Manager

Redesign the DMV Experience

You are asked to improve the DMV customer experience. You are given a short overview of DMV operations and several negative customer reviews. Answer: ...

Product Design & StrategyProduct Design & Improvement
40
0
623 people solved
Jun 12, 2025
Oscar logo
Oscar
Medium
Software Engineer

Solve Morse and Network Access Tasks

Solve the following two independent coding problems. Problem 1: Convert Between Text and Morse Code You are given the standard Morse-code mapping for ...

Coding & Algorithms
12
0
148 people solved
Apr 15, 2026
LinkedIn logo
LinkedIn
Medium
Data Scientist

Test a New Feature at Its Natural Product Placement

Test a New Feature at Its Natural Product Placement Design an experiment for a new feature. Explain why initially evaluating it in its natural product...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs
1
0
23 people solved
Sep 22, 2026
Rippling logo
Rippling
Medium
Software Engineer Locked

Design a Logger with Independent Handlers

Design a logging library with independent handlers, immutable records, isolated failures, bounded backpressure, and safe runtime reconfiguration.

Software Engineering Fundamentals
23
0
295 people solved
Aug 21, 2026
Amazon logo
AmazonInfosysDeshaw

Also asked at Deshaw, Uber, Waymo, Google, Bloomberg, Microsoft

Hard
Software Engineer

Minimize Refueling Stops on a One-Direction Journey

Problem A car starts at coordinate0 with startFuel liters and travels east to target. It consumes one liter per mile and has an unlimited-capacity tan...

Coding & AlgorithmsGreedyHeaps & Priority Queues
1
0
14 people solved
Google logo
GoogleAmazonMicrosoft

Also asked at Microsoft, AppLovin, Meta, Bloomberg, Goldman Sachs, Agoda, Microstrategy, Roku, Salesforce, Wells Fargo

Easy
Software Engineer

Compare Two Backspace-Edited Strings

Problem Type each string into a separate empty editor. Lowercase letters append themselves and deletes the latest remaining character, doing nothing w...

Coding & AlgorithmsTwo Pointers & Sliding WindowStacks & Queues
1
0
12 people solved
Amazon logo
AmazonMetaMicrosoft

Also asked at Microsoft, Capital One, Google, IBM

Medium
Software Engineer

Most Satisfied Customers With One Calm Window

Problem For minute i, customers[i] customers arrive and leave that same minute. They are satisfied exactly when grumpy[i] is 0. Once during the day, t...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
1
0
10 people solved
Amazon logo
AmazonGoogleMeta

Also asked at Meta, Bloomberg, Microsoft, Accenture, Intel

Medium
Software Engineer

Find Values Occurring More than One Third of the Array

Problem Return every value occurring more than floor(n/3) times in nums. Return each qualifying value once; the source prescribes no ordering between ...

Coding & AlgorithmsArrays & Strings
1
0
9 people solved
Amazon logo
AmazonTCSGoogle

Also asked at Google, Meta, Infosys, Bloomberg, Microsoft, Qualcomm

Medium
Software Engineer

Locate a Guaranteed Mountain Peak Logarithmically

Problem arr is guaranteed to rise strictly to one interior peak and then fall strictly. Return the peak's zero-based index using O(log n) time. `cpp c...

Coding & AlgorithmsBinary Search
1
0
10 people solved
Amazon logo
Amazon
Medium
Software EngineerNew Grad Locked

Evaluating Generative AI Use and Accuracy

Discuss prior generative-AI projects, when generative AI is an appropriate tool, useful application patterns, and how to evaluate and improve output a...

Machine Learning
14
0
100 people solved
Sep 2, 2026
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Microsoft, Meta, Infosys

Easy
Software Engineer

Append a Second Copy of an Array

Problem Given nums of length n, return a length-2*n array consisting of the entire input sequence followed by a second copy in the same order. Thus, f...

Coding & AlgorithmsArrays & Strings
0
0
11 people solved
MongoDB logo
MongoDB
Medium
Product Manager

How a PM Decides When to Ship Fast and When to Harden a Release

As a product manager, how do you decide how hard to push for fast delivery versus how much engineering time to spend making a release robust? Describe...

Product / Decision MakingTechnical Tradeoffs for PMsPrioritization & Tradeoffs
0
0
8 people solved
Oct 9, 2026
Bloomberg logo
BloombergMicrosoftRippling

Also asked at Rippling, Expedia, Visa, Amazon, Deshaw, Salesforce, Meta, Tower

Medium
Software Engineer

Print the Smallest String through a Last-In-First-Out Robot Buffer

Problem Start with input s, an empty robot buffer t, and empty paper. You may move the first remaining input character to the end of t, or remove the ...

Coding & AlgorithmsStacks & QueuesGreedy
1
0
15 people solved
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