Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions

509

Companies

980

Updated

11.08.2026

509 Questions 980 Companies11.08.2026

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

Medium

Data Engineer

Settle Shared-Expense Debts, Then Reduce the Number of Payments

A group of people share expenses and record what they owe one another as a list of debts. Write code that tells them how to settle up: a list of payme...

Software Engineering FundamentalsGreedyHeaps & Priority Queues

Pick Mempool Transactions for a Block with Parent Dependencies and CPFP

A mempool holds transactions that are waiting to be included in a block. Each transaction has an id, a fee that the miner collects for including it, a...

Software Engineering FundamentalsGreedyGraphs

Fewest Coins for an Amount with Unlimited or Single-Use Coins

You are given coin values coins and a target amount. Return the fewest coins whose values add up to exactly amount, or -1 if no selection of coins doe...

Coding & AlgorithmsDynamic Programming

88 people solved

Oct 15, 2026

Medium

Software EngineerSenior+

Fewest-Edge Distance Between Two Nodes in a Directed Acyclic Graph

This came as a follow-up to ordering the nodes of a dependency graph. You are given a directed acyclic graph with n nodes labeled 0 to n - 1, a list o...

Coding & AlgorithmsGraphs

Quantitative Researcher

Compute the Probability of Consecutive Heads in n Tosses

Find the probability that a sequence of n independent fair coin tosses contains at least one consecutive HH pair. Derive a recurrence and explain the ...

Statistics & MathProbabilityDynamic Programming

Counting Up-Right Grid Paths With No k Consecutive Moves in One Direction

A frog starts at $(0, 0)$ and wants to reach $(X, Y)$, where $X$ and $Y$ are nonnegative integers. Each move takes it one unit right or one unit up. T...

Statistics & MathDynamic ProgrammingMath & Number Theory

Process One Transaction per Day to Minimize Total Late Fees

You are given a backlog of transactions, each with a due day. Exactly one transaction can be processed per day. A transaction processed after its due ...

Software Engineering FundamentalsGreedyHeaps & Priority Queues

Software Engineer Locked

Spreadsheet String Concatenation with Dependent Cells

Build a fixed-grid string spreadsheet with concatenation formulas, dependency updates, repeated references, and read-time circular-reference errors.

Coding & AlgorithmsGraphsArrays & Strings

Group prerequisite-linked courses into the earliest possible rounds

There are n courses numbered 0 to n - 1. Each pair [a, b] in prerequisites means course b must be completed before course a can be taken. Courses are ...

Coding & AlgorithmsGraphs

Autopilot for a Flappy Bird-Style Game Across Maps with Varying Pipe Gaps

Build an autopilot for a Flappy Bird-style game. The bird flies to the right at a constant speed while gravity pulls it down, and a flap gives it a fi...

Software Engineering FundamentalsSimulation & State Machines

Software Engineer Locked

Validate Evaluation Chains and Resolve Boolean Outcomes

Resolve Boolean evaluation chains, detect cycles and paths into cycles, and handle disconnected components with a linear-time graph traversal.

Coding & AlgorithmsGraphs

Software EngineerSenior+

Count Ways to Build a Target from Increasing Dictionary Columns

You are given equal-length words and a target string. Build the target from left to right. For each target character, choose a matching character from...

Coding & AlgorithmsDynamic ProgrammingArrays & Strings

Count BST Shapes with Exact Catalan Arithmetic

Problem Return the number of structurally different binary search trees containing exactly the distinct keys 1 through n. Each key appears once, and a...

Coding & AlgorithmsDynamic ProgrammingTrees

Final Grid Position Under Timestamped Direction Changes With Dot Obstacles

An object sits on a rectangular grid. Over time, a list of timestamped actions sets the direction in which it travels: up, down, left or right. While ...

Coding & AlgorithmsSimulation & State Machines

Find where a query's words appear in order, each within k positions

You are given a text, a query and an integer k. Find every place where the words of the query appear in the text in the same order, with each query wo...

Coding & AlgorithmsDynamic Programming

Software Engineer Locked

Count Distinct Hat Assignments and Maximize Hat Points

Count valid one-hat-per-person assignments and maximize assigned-hat points with exact counts, unique hat use, and bitmask or backtracking reasoning.

Coding & AlgorithmsDynamic ProgrammingBacktracking & Recursion

Rank Every Cell of a Distinct-Value Matrix Consistently Within Its Row and Column

You are given an m x n matrix of distinct integers. Return a matrix of the same shape in which every value is replaced by its rank, defined by these r...

Coding & AlgorithmsSortingGrids & Matrices

Reach the Last Index in the Fewest Jumps

Problem You start at index 0 of the integer array jumps. From index i, choose an integer distance d and move to index i + d, provided that: - 0 <= d <...

Coding & AlgorithmsGreedyDynamic Programming

29 people solved

Jane Street

Hard

Software Engineer Locked

Optimal Stopping with Square-Number Ruin

You repeatedly roll a fair six-sided die and add each roll to a running total. Explain the assumptions and derivation clearly, check edge cases, and s...

Statistics & MathPuzzles & BrainteasersProbability

144

1323 people solved

Aug 3, 2026

GoogleAmazonMicrosoft

Medium

Software Engineer

Count Right-and-Down Grid Routes

Problem A rectangular grid contains row_count rows and column_count columns. Starting in its upper-left cell, count the routes that finish in its lowe...

Coding & AlgorithmsDynamic ProgrammingGrids & Matrices

31 people solved

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Tech Interview Questions

Settle Shared-Expense Debts, Then Reduce the Number of Payments

Pick Mempool Transactions for a Block with Parent Dependencies and CPFP

Fewest Coins for an Amount with Unlimited or Single-Use Coins

Fewest-Edge Distance Between Two Nodes in a Directed Acyclic Graph

Compute the Probability of Consecutive Heads in n Tosses

Counting Up-Right Grid Paths With No k Consecutive Moves in One Direction

Process One Transaction per Day to Minimize Total Late Fees

Spreadsheet String Concatenation with Dependent Cells

Group prerequisite-linked courses into the earliest possible rounds

Autopilot for a Flappy Bird-Style Game Across Maps with Varying Pipe Gaps

Validate Evaluation Chains and Resolve Boolean Outcomes

Count Ways to Build a Target from Increasing Dictionary Columns

Count BST Shapes with Exact Catalan Arithmetic

Final Grid Position Under Timestamped Direction Changes With Dot Obstacles

Find where a query's words appear in order, each within k positions

Count Distinct Hat Assignments and Maximize Hat Points

Rank Every Cell of a Distinct-Value Matrix Consistently Within Its Row and Column

Reach the Last Index in the Fewest Jumps

Optimal Stopping with Square-Number Ruin

Count Right-and-Down Grid Routes

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