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

Microsoft

Hard

Software Engineer

Compute discounted prices and full-price indices

You are given an array prices of length $n$. Items are sold from left to right, and each item’s final selling price is computed as follows: For item...

Coding & AlgorithmsStacks & Queues

Maximize coins collected by tokens jumping +3

You are given a single-player board game represented by a string board of length N (1 ≤ N ≤ 100). Each character is one of: - '.': empty cell - 'T': a...

Coding & AlgorithmsGreedyArrays & Strings

Software Engineer Locked

Minimize Circular Redistribution Cost

This question evaluates algorithmic problem-solving skills in array manipulation, circular data structures, load balancing, and cost optimization whil...

Maximum Profit from Normal and Short Transactions

Maximum Profit from Normal and Short Transactions You are given daily stock prices in prices and a positive integer k. Complete at most k transactions...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings

10 people solved

Zillow

Medium

Machine Learning Engineer

Write pseudocode for a ReAct-style loop

Coding prompt (pseudocode) Write pseudocode (does not need to compile) for a ReAct-style agent loop that alternates between reasoning and actions. Req...

Coding & AlgorithmsAI AgentsLLM Applications

Software EngineerIntern Locked

Match people to questions using tags and priorities

This question evaluates competencies in bipartite matching and combinatorial optimization, along with practical data-structure design for scalable tag...

Coding & AlgorithmsGraphs

Machine Learning Engineer

Explain what torch.distributed.barrier does

Question In PyTorch distributed training, what does torch.distributed.barrier() do? Follow-ups - Give an example of when you would use it. - What are ...

Software Engineering FundamentalsNeural Networks & Training

Machine Learning Engineer

Train and analyze a classifier

You are given a labeled dataset for binary classification. Implement an end-to-end Python solution that trains a classifier and analyzes it to a produ...

Data Manipulation (SQL/Python)ML FundamentalsModel Evaluation

Software EngineerIntern

Sort Absolute-Difference Scores Across Cyclic Shifts

Problem Two integer arrays nums1 and nums2 have the same length. For every right cyclic shift of nums1 by t positions, compute the sum of absolute dif...

Software Engineer Locked

Compute ETA between two map nodes

This question evaluates proficiency in graph algorithms and shortest-path computation, specifically handling weighted directed graphs, non-negative tr...

Coding & AlgorithmsGraphs

Software Engineer Locked

Design a batched inference API

This question evaluates competency in designing scalable, low-latency ML inference systems with dynamic batching, covering system architecture, reques...

ML System DesignMLOps & Model ServingAPI Design

127 people solved

Feb 8, 2026

Extend a Maze Solver

You are given an existing codebase for a maze game and solver. The maze is represented as a 2D grid containing: - S: start cell - T: target cell - .: ...

Ranking Map and Routing Factors for Amazon Last-Mile Delivery Drivers

You are a product manager at Amazon responsible for the maps drivers use on the last mile of delivery, the final leg from the local delivery facility ...

Product Design & StrategyPrioritization & TradeoffsMetrics & KPIs

Software EngineerSenior+

Design Internal Chat and Re-engagement Emails

Design an internal chat system for an event marketplace company. Requirements: - Employees can send and receive one-to-one messages in real time. - Cl...

System DesignReal-Time SystemsMessaging & Event-Driven

115 people solved

Feb 16, 2026

GoogleAmazonBloomberg

Easy

Software Engineer

Report Direct-Report Counts and Rounded Ages for Every Manager

Problem A manager is an employee with at least one other employee reporting directly to them. Return employee_id, name, reports_count and average_age ...

Data Manipulation (SQL/Python)SQL

6 people solved

Google

Medium

Software EngineerNew Grad Locked

Search a Pattern Across the Leaf Text of a Binary Tree

Search for a pattern across the left-to-right concatenation of binary-tree leaf strings, including matches that cross leaf boundaries. This algorithm ...

Coding & AlgorithmsString AlgorithmsTrees

Compare Normal and Poisson Distributions in Statistics

Comparing Normal and Poisson Distributions You are modeling event counts, such as number of clicks, and continuous measurements, such as response time...

Statistics & MathProbability

Least Signed Permutation with a Target Sum

Problem Given a positive integer n and an integer target, return the lexicographically smallest integer array of length n satisfying both conditions: ...

Coding & AlgorithmsGreedyMath & Number Theory

9 people solved

OpenAI

Medium

Software Engineer Locked

Design a Text-to-Video Generation Service

This question evaluates understanding of ML system design, distributed scheduling, durable asynchronous job pipelines, GPU resource orchestration, and...

ML System DesignGPU InfrastructureJob Scheduling & Workflows

Implement Longest-Match Text Replacement

You are given a text string and a dictionary of replacement entries. Each dictionary entry has the form token:id, where token is a string pattern and ...

Coding & Algorithms

178 people solved

Jan 20, 2026

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Tech Interview Questions

Compute discounted prices and full-price indices

Maximize coins collected by tokens jumping +3

Minimize Circular Redistribution Cost

Maximum Profit from Normal and Short Transactions

Write pseudocode for a ReAct-style loop

Match people to questions using tags and priorities

Explain what torch.distributed.barrier does

Train and analyze a classifier

Sort Absolute-Difference Scores Across Cyclic Shifts

Compute ETA between two map nodes

Design a batched inference API

Extend a Maze Solver

Ranking Map and Routing Factors for Amazon Last-Mile Delivery Drivers

Design Internal Chat and Re-engagement Emails

Report Direct-Report Counts and Rounded Ages for Every Manager

Search a Pattern Across the Leaf Text of a Binary Tree

Compare Normal and Poisson Distributions in Statistics

Least Signed Permutation with a Target Sum

Design a Text-to-Video Generation Service

Implement Longest-Match Text Replacement

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