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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
Google logo
GoogleAmazonBloomberg

Also asked at Bloomberg, Meta, Microsoft, Oracle, Samsung

Medium
Software Engineer

Compute a Quotient Using Signed 32-Bit Operations

Problem Return the integer quotient of dividend and divisor without using multiplication, division, or remainder/modulo operators. Discard the fractio...

Coding & AlgorithmsMath & Number Theory
4
0
32 people solved
Atlassian logo
Atlassian
Easy
Software Engineer

Design a Rate Limiter Service: Components, Scaling and Precision Trade-offs

Design a rate limiter service: a component that decides, for every incoming API request, whether the caller that sent it is still within its allowed n...

System DesignRate LimitingPartitioning & Consistent Hashing
18
0
270 people solved
Aug 13, 2026
Waymo logo
Waymo
Medium
Machine Learning Engineer Locked

Implement Softmax Cross-Entropy Forward and Backward Passes and a Training Loop

Implement the forward and backward passes of softmax with cross-entropy loss from scratch, then write a full training loop for a linear classifier. Te...

Machine LearningML CodingNeural Networks & Training
33
0
224 people solved
Sep 10, 2026
Rippling logo
Rippling
Medium
Software Engineer

Delivery Cost Dashboard with Effective-Dated Driver Rates and Exact Money Totals

A food-delivery platform pays its drivers per delivery. The cost of one delivery is its duration multiplied by the hourly rate of the driver who made ...

Software Engineering FundamentalsLow-Level Design (OOP)
19
0
158 people solved
Oct 1, 2026
Legora logo
Legora
Medium
Software EngineerSenior+

Senior engineer project deep dive: trade-offs, scale, challenges, hardest part

You are interviewing for a senior software engineer role. The technical screen lasts 45 minutes with an engineer from the team, and the first 20 minut...

Behavioral & LeadershipProject Deep Dive
8
0
106 people solved
Oct 4, 2026
Ode logo
Ode
Medium
Software Engineer

Design an LLM-Assisted Pipeline to Clean and Import Schema-Less Client CSV Files

In a 45-minute client-scenario interview you advise a customer that sells a SaaS product for demographic and payroll analytics. Its clients send data ...

ML System DesignSystem Design FundamentalsData Cleaning & Wrangling
0
0
12 people solved
Oct 30, 2026
Waymo logo
Waymo
Medium
Data Scientist

Evaluate a New Version in Simulation and Explain a Flat Live Result

Evaluate a New Version in Simulation and Explain a Flat Live Result A new version performs better in offline simulation but shows no detectable improv...

Analytics & ExperimentationLaunch EvaluationHypothesis Testing
12
0
128 people solved
Sep 28, 2026
NVIDIA logo
NVIDIA
Hard
Software EngineerNew Grad

Verification Plan for a FIFO, a Round-Robin Arbiter and a Valid/Ready Handshake

In a hardware design-verification interview, you are handed a small block and its spec and asked how you would verify it: the verification architectur...

Software Engineering FundamentalsTesting & Quality
14
0
217 people solved
Sep 17, 2026
Google logo
GoogleBlackRockAmazon

Also asked at Amazon, Meta, Microsoft, Bloomberg, TCS, LinkedIn, Walmart Labs, Siemens, IBM, Intuit, Tripadvisor, Virtu Financial, Accolite, Epic Systems, Apple, Oracle, Zoho, Infosys, NVIDIA, Zulily, Yandex, Cerner, TikTok, Udemy

Easy
Software Engineer

Check Matching and Nested Brackets

Problem The string brackets contains only (, ), [, ], {, and }. Return true exactly when all brackets can be matched correctly; otherwise return false...

Coding & AlgorithmsStacks & QueuesParsing & Interpreters
3
0
38 people solved
ByteDance logo
ByteDance
Hard
Software Engineer

Maximum of Each Length-k Window in an Integer Array

Given an integer array nums and a window length k, slide a window of exactly k consecutive elements from the left end of the array to the right end, o...

Coding & AlgorithmsTwo Pointers & Sliding WindowStacks & Queues
2
0
27 people solved
Oct 22, 2026
Instacart logo
Instacart
Medium
Software Engineer

Design an Inventory Service with Stock Reservations That Prevents Overselling

Design an inventory service for a store that sells items in limited stock. When customers place orders, the service must reserve stock for them so tha...

System DesignSystem Design FundamentalsTransactions & Isolation
8
0
62 people solved
Oct 10, 2026
Confluent logo
Confluent
Easy
Software EngineerNew Grad

Total Per-Letter Counts from an Encoded String with Multi-Digit Numbers

A string encodes counts in a fixed format: a lowercase letter followed by a decimal number, repeated. The same letter may appear more than once. Add u...

Coding & AlgorithmsArrays & Strings
0
0
11 people solved
Nov 5, 2026
Meta logo
MetaGoogleAmazon

Also asked at Amazon, Bloomberg, Microsoft, TCS, Walmart Labs, UiPath

Medium
Software Engineer

Enumerate Distinct Subsets with Repeated Input Values

Problem Return all distinct subsets of the integer entries in nums, which may contain repeated values. Each subset may use a value no more times than ...

Coding & AlgorithmsBacktracking & Recursion
2
0
46 people solved
Whatnot logo
Whatnot
Easy
Software Engineer

Check Whether a String Can Become a Palindrome by Deleting at Most One Character

Given a string s, return True if s can be made into a palindrome by deleting at most one character, and False otherwise. A palindrome reads the same f...

Coding & AlgorithmsTwo Pointers & Sliding WindowArrays & Strings
5
0
92 people solved
Oct 10, 2026
Tower logo
Tower
Medium
Quantitative ResearcherIntern

Can Pooled Correlation Exceed Every Group Correlation?

A dataset has 100,000 observations with variables x1 and x2. It is divided into three groups of approximately equal size. Within each group, the Pears...

Statistics & MathProbability
2
0
20 people solved
Oct 24, 2026
Google logo
Google
Medium
Software Engineer

Design a CI system that runs one million tests in ten minutes

Design a continuous integration (CI) system for a large codebase whose test suite has about 1,000,000 tests. When a developer submits a change, the sy...

System DesignCI/CD & DeploymentJob Scheduling & Workflows
33
0
294 people solved
Sep 21, 2026
Pinterest logo
Pinterest
Medium
Machine Learning EngineerIntern

Ensemble Learning Trade-offs and Why Bagging Reduces Overfitting

Two multiple-choice questions in this assessment concerned ensemble methods: one on the advantages and disadvantages of ensemble learning (for example...

Machine LearningSupervised LearningML Fundamentals
1
0
31 people solved
Oct 14, 2026
Mercor logo
Mercor
Medium
Software Engineer

Currency Exchange Rate Between Two Currencies via Chained Conversions

You are given a table of currency exchange rates. Each entry [from, to, rate] means that 1 unit of currency from is worth rate units of currency to. F...

Coding & AlgorithmsGraphs
24
1
305 people solved
Sep 13, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Build a Rectangle Board with Remove-at-Cell, Batch Remove, and Undo

Implement a 2D board that holds axis-aligned rectangles. The requirements arrive one at a time, and each Part builds on your code from the previous on...

Software Engineering FundamentalsData Structure DesignLow-Level Design (OOP)
37
0
286 people solved
Aug 30, 2026
Bnsf logo
Bnsf
Medium
Software Engineer

Design an Instant Messenger With Sending, Delivered and Read Statuses

Design the backend of an instant messaging app. Besides sending and receiving messages, the app must show the sender the status of every message they ...

System DesignReal-Time SystemsStorage & Sharding
0
0
11 people solved
Oct 30, 2026
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