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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
Databricks logo
Databricks
Hard
Data ScientistIntern

Diagnose and fix multicollinearity in income regression

You want to estimate the relationship between gender and income using a regression model, while controlling for other covariates such as: - age - educ...

Statistics & MathRegression & Statistical Modeling
7
0
115 people solved
Oct 14, 2025
Amazon logo
Amazon
Medium
Product Manager

Package-to-driver assignment for peak and quiet delivery hours, with tracking metrics

You are the product manager responsible for last-mile package delivery. Design the system that assigns delivery orders to drivers so that as many orde...

System DesignMetrics & KPIsGeo & Delivery Systems
1
1
31 people solved
Jul 23, 2025
Google logo
Google
Medium
Software Engineer

Evaluate a Lisp-Style Expression Language with let, add and mult Scoping

Reported from a Google software engineering coding interview. Write an evaluator for a tiny Lisp-like expression language. Given one valid expression ...

Coding & AlgorithmsParsing & Interpreters
1
0
28 people solved
Mar 4, 2026
C3 AI logo
C3 AI
Medium
Software EngineerNew Grad

Evaluate Factual Accuracy and Consistency in a Domain-Specific RAG Chatbot

A retrieval-augmented generation (RAG) chatbot assists doctors in investigating rare diseases. Factual accuracy and consistency are important, but ret...

Machine LearningLLM EvaluationRetrieval-Augmented Generation
3
0
33 people solved
Jan 23, 2026
Visa logo
Visa
Medium
Software Engineer I Locked

Count Cross-Array Pairs with a Target Sum

Count cross-array index pairs whose values add to a target, with duplicates contributing their full multiplicity. Use complementary frequency counts o...

Coding & Algorithms
4
0
47 people solved
Aug 8, 2026
OpenAI logo
OpenAI
Hard
Software Engineer

Implement a Contiguous Memory Allocator with Primitive Lists

Implement a Contiguous Memory Allocator with Primitive Lists Simulate an allocator over the contiguous address range [0, capacity), initially one free...

Coding & Algorithms
11
0
137 people solved
Feb 19, 2026
Visa logo
Visa
Medium
Software Engineer I Locked

Find the Shortest Distance in a Weighted Undirected Graph

Find the minimum total weight between two vertices in a large undirected graph with positive edges. Build an adjacency list, run Dijkstra with a prior...

Coding & Algorithms
5
0
40 people solved
Aug 8, 2026
Liftoff logo
Liftoff
Medium
Software Engineer

Design and implement core Tetris game logic

Implement the core logic of the Tetris game in a way that can run in a terminal (no graphical UI required). Requirements: - Board/grid: standard size ...

Software Engineering Fundamentals
10
0
96 people solved
Feb 26, 2026
Amazon logo
AmazonGoogleMicrosoftBloomberg

Also asked at Microsoft, Bloomberg

Easy
Software Engineer

Reverse Through the First Matching Character

Problem Reverse the prefix of word from index 0 through the first occurrence of ch, including that occurrence. Leave every later character unchanged. ...

Coding & AlgorithmsArrays & Strings
0
0
9 people solved
Google logo
Google
Medium
Product Manager

Explain How Machine Learning Works Using a Kid-Friendly Analogy

In a Google product manager interview, the interviewer asks you to explain machine learning to a five-year-old. Deliver the explanation the way you wo...

Machine LearningCommunication & StakeholdersML Fundamentals
0
0
11 people solved
Jun 12, 2026
Applied Intuition logo
Applied Intuition
Medium
Machine Learning Engineer

Debug a GPT training pipeline

Fix three bugs in a minimal GPT to meet a training-loss target You are given a Colab notebook with a minimal GPT-style language model implemented in P...

ML System DesignML CodingDebugging
26
0
206 people solved
Sep 6, 2025
J.P. Morgan logo
J.P. Morgan
Easy
Software Engineer

Improve shopping cart latency and stock notifications

You are given an existing e-commerce shopping cart system (web/mobile) that already supports adding/removing items and viewing the cart. The interview...

System DesignReal-Time SystemsCaching
18
0
156 people solved
Feb 9, 2026
Google logo
Google
Medium
Data ScientistSenior+

How would you use propensity score matching here

You want to estimate the causal effect of a new recommender feature on 7-day retention. The feature was not randomized: users “opt in” after seeing a ...

Analytics & ExperimentationCausal Inference
29
0
223 people solved
Nov 24, 2025
Google logo
GoogleAmazonMetaTCS

Also asked at Meta, TCS

Easy
Software Engineer

Reshape a Matrix while Preserving Row Order

Problem Return mat reshaped to r rows and c columns, retaining its original row-by-row sequence. If the new dimensions do not contain exactly the same...

Coding & AlgorithmsGrids & Matrices
0
0
12 people solved
Pinterest logo
Pinterest
Medium
Machine Learning Engineer Locked

Solve five hard algorithm problems

This set of problems evaluates algorithm design and problem-solving skills across array manipulation, range-update techniques, load-balancing and part...

Coding & AlgorithmsArrays & StringsGreedy
10
0
160 people solved
Mar 8, 2026
Google logo
GoogleMetaAmazon

Also asked at Amazon, Microsoft, Innovaccer, Bloomberg

Easy
Software Engineer

Seconds Until a Chosen Ticket Buyer Finishes

Problem People initially line up in array order, and person i wants to buy tickets[i] tickets. Each purchase takes exactly one second and buys one tic...

Coding & AlgorithmsSimulation & State MachinesStacks & Queues
1
0
7 people solved
OpenAI logo
OpenAI
Medium
Software Engineer

Implement KV store and plan type conversions

Part 1 — Versioned key-value store: Implement a data structure with set(key, value, t) and get_at(key, t) that returns the value for key whose timesta...

Coding & AlgorithmsData Structure DesignGraphs
68
0
531 people solved
Sep 6, 2025
Meta logo
Meta
Medium
Software Engineer

Design a bank system with scheduled transfers

Bank System (OOD): Accounts, Transfers, Scheduling, Top Spending, Merge Design an in-memory banking system that supports: - account creation - deposit...

Coding & Algorithms
7
0
102 people solved
Feb 11, 2026
Google logo
Google
Easy
Software Engineer

Find the Smallest Stable Index I

Find the Smallest Stable Index I You are given an integer array nums of length n and an integer k. For each zero-based index i, define its instability...

Coding & AlgorithmsArrays & Strings
0
0
7 people solved
Amazon logo
Amazon
Medium
Machine Learning Engineer

GRPO in NumPy: Group-Relative Advantages, Process Rewards and Shaped Rewards

In a notebook, implement the core computations of Group Relative Policy Optimization (GRPO) with NumPy, then extend them to process rewards and to sha...

Machine LearningReinforcement LearningML Coding
4
0
32 people solved
Jan 3, 2026
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