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

"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_

"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"

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

"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."

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

"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."

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

_The_TaNk_

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

"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."

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

CarlosFull Stack, Shopify

"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."

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."

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

"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."

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

"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."

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

"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."

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

Bitkernel

Medium

Software Engineer

Trace first pass of heap sort

Given the integer array [7, 6, 3, 5, 4, 1, 2], you apply heap sort to sort it in ascending order using a max-heap implementation. After building the i...

Software Engineering Fundamentals

Sort a nearly sorted array

Given an array of length $n$ in which every element is at most $k$ positions away from its location in the fully sorted order, design an algorithm...

Coding & AlgorithmsHeaps & Priority QueuesSorting

Machine Learning Engineer

Explain LLM tuning and transformer basics

Answer the following machine learning questions: - Describe a project where you fine-tuned a large language model or another large foundation model. E...

Machine LearningFine-Tuning & Alignment TechniquesTransformers & Attention

Compare Normal vs Poisson; test dispersion and approximate tails

You collect n=200 independent minute-level event counts with sample mean x̄=14.5 and sample variance s²=16.2. 1) Under a Poisson(λ) model, derive the ...

Statistics & MathHypothesis TestingSampling & Estimation

Compute minimum passes to collect numbers

Question You are given an array shelf of n distinct integers that is a permutation of 1…n. Starting with target = 1, you repeatedly scan shelf from le...

Largest Sum of a BST Rooted Subtree

Problem Among rooted subtrees of the native binary tree, find the largest sum whose entire subtree is a strict binary search tree. Every left descenda...

Coding & AlgorithmsTreesDynamic Programming

Buy All Items Under a Two-Paid One-Free Offer

Problem A shop lets you take one candy free for every two candies you pay for, provided the free candy costs no more than either paid candy. Given the...

Coding & AlgorithmsGreedySorting

Metrics framework for an AI feature: user value, output quality, cost and safety

You are the product manager for a feature or product whose core output comes from an AI model. How would you define the metrics that show whether it i...

Analytics & ExperimentationMetrics & KPIsAI Product Management

16 people solved

May 9, 2026

Select a Ranked Large Decimal Integer

Problem Each entry in nums is a nonnegative integer represented as a decimal string without leading zeros. Return the representation of the k-th large...

Coding & AlgorithmsSortingMath & Number Theory

Introduce yourself and discuss resume details

Behavioral Interview Prompt: Self-Introduction, Resume Walkthrough, Project Deep Dives, Collaboration, and Questions What to Deliver - Self-introducti...

Behavioral & LeadershipProject Deep Dive

Machine Learning Engineer Locked

Train and improve a scikit-learn binary classifier

Evaluates the ability to train, evaluate, and iteratively improve a scikit-learn binary classifier, encompassing model selection, preprocessing, valid...

Machine LearningSupervised LearningModel Evaluation

Implement rate limiter, top-K, scheduler algorithms

Question Design and implement a thread-safe Rate Limiter; extend it to support multi-threading and a version where current time is not passed as an ar...

Software Engineer Locked

Design a URL Shortener

This question evaluates a candidate's ability to design scalable, highly available distributed systems, covering competencies in API design, data mode...

Minimize travel cost with two cities

You are scheduling candidates to attend an onsite interview. Each candidate i can fly to New York for cost c1[i] or to San Francisco for cost c2[i]. C...

Coding & AlgorithmsGreedySorting

Estimate Volatility from Gaussian and Brownian Samples

You are given two statistical estimation problems. 1. Let X_1, ..., X_100 be independent samples from N(0, sigma^2), where the mean is known to be 0 a...

Describe how you resolve conflicts at work

Interview-style behavioral question: "Tell me about a time you had a conflict with a teammate, stakeholder, or manager. What caused the conflict, how ...

Behavioral & LeadershipConflict & Collaboration

Find the Shortest Contiguous Segment Reaching a Sum Threshold

Problem Return the minimum length of a nonempty contiguous segment of nums whose sum is at least k. Return -1 if no segment qualifies. Values may be n...

Coding & AlgorithmsStacks & QueuesArrays & Strings

Optimize CUDA GEMM with tiling and coalescing

CUDA Execution Model, Memory Hierarchy, and GEMM Kernel Design You are interviewing for a Data Scientist / GPU-software role at NVIDIA. The interviewe...

Coding & AlgorithmsGPU Programming

Campaign Efficiency Metrics and Below-Average CTR

Campaign Efficiency Metrics and Below-Average CTR You are given an ad_campaigns table with one row per campaign: | Column | Type | Meaning | | --- | -...

Data Manipulation (SQL/Python)

Software Engineer Locked

Investing in Deliberate Professional Growth

Describe a deliberate professional-growth activity through the skill gap, chosen practice, feedback loop, and observable change it produced. The promp...

Behavioral & Leadership

22 people solved

Aug 19, 2026

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Tech Interview Questions

Trace first pass of heap sort

Sort a nearly sorted array

Explain LLM tuning and transformer basics

Compare Normal vs Poisson; test dispersion and approximate tails

Compute minimum passes to collect numbers

Largest Sum of a BST Rooted Subtree

Buy All Items Under a Two-Paid One-Free Offer

Metrics framework for an AI feature: user value, output quality, cost and safety

Select a Ranked Large Decimal Integer

Introduce yourself and discuss resume details

Train and improve a scikit-learn binary classifier

Implement rate limiter, top-K, scheduler algorithms

Design a URL Shortener

Minimize travel cost with two cities

Estimate Volatility from Gaussian and Brownian Samples

Describe how you resolve conflicts at work

Find the Shortest Contiguous Segment Reaching a Sum Threshold

Optimize CUDA GEMM with tiling and coalescing

Campaign Efficiency Metrics and Below-Average CTR

Investing in Deliberate Professional Growth

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