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

ByteDance

Hard

Software Engineer Locked

Find Unique One-Use Combination Sums with Negative Values

Find every unique combination that reaches a target when each input occurrence may be used once and candidates may be negative. The prompt defines dup...

Software Engineer Locked

Solve meeting-room scheduling and shortest paths

This question evaluates proficiency in interval scheduling and resource allocation as well as shortest-path computation in weighted directed graphs, e...

Coding & AlgorithmsIntervals & SchedulingGraphs

Design Interval Membership Queries with Linear, Logarithmic, and Constant-Time Options

Interview Prompt Design a class with addNonOverlappingInterval(start, end) and contains(x). Compare a straightforward O(n) query, an O(log n) query, a...

Software Engineering Fundamentals

Frontend EngineerSenior+ Locked

Build an Event-Driven Folder Browser

Design the state model and component architecture for an editable folder browser with unbounded nesting and stable identity. Support expansion, create...

Software Engineering Fundamentals

Software Engineer Locked

Find Path Between Fibonacci Tree Nodes

This question evaluates a candidate's ability to reason about recursive tree structures, map preorder indices to positions in a recursively defined Fi...

Coding & AlgorithmsTreesDynamic Programming

159 people solved

Feb 13, 2026

Medium

Software Engineer Locked

Scale a NoSQL Key–Value Store to One Million QPS

Scale a key–value store to 50 million pairs and one million requests per second, balancing reads and writes with sharding, replication, and capacity p...

System DesignKey-Value StoresPartitioning & Consistent Hashing

Swiggy Product Strategy: Getting Customers to Spend More per Order

Swiggy wants customers to spend more each time they order. How would you raise its average order value (AOV)? `hint Start from per-order economics Ask...

Product Design & StrategyGrowth & Monetization

Software EngineerSenior+

Search for a Value in a Matrix Sorted as One Continuous Sequence

You are given an m x n integer matrix with two ordering properties: every row is sorted in non-decreasing order, and the first value of each row is st...

Coding & AlgorithmsBinary Search

Software EngineerIntern Locked

Design a logger that returns top-K messages

This question evaluates skills in designing in-memory data structures and algorithms for frequency counting and interval querying, including extractin...

Coding & AlgorithmsData Structure DesignHeaps & Priority Queues

Quantitative TraderIntern

Choose and Defend a Betting Strategy Under Uncertain Odds

Prompt You have a fixed bankroll and a sequence of independent matches with quoted odds and match times. Before selected matches, you receive qualitat...

Design an order-matching engine

In-Memory Limit Order-Matching Engine (Limit Order Book) Context Design and implement an in-memory, single-instrument limit order book that supports l...

System Design

536 people solved

Sep 6, 2025

Decide and experiment on Group Call feature

Assume today is 2025-09-01. You have only one table, calls_daily_agg(date, user_id, country, device_tier, one_to_one_calls_started, one_to_one_call_du...

Analytics & ExperimentationExperiment Design (A/B Testing)Metrics & KPIs

Effective Permissions in an Inheritance DAG with Allow and Deny Lists

Permissions are inherited along the edges of a directed acyclic graph. Each node, such as a group, a folder or a resource, has its own allow list and ...

Software Engineering FundamentalsGraphsAuthentication & Authorization

19 people solved

Apr 28, 2026

AmazonPublicis SapientGeico

Medium

Software Engineer

Build the Greatest Non-Leading-Zero Palindrome from Available Digits

Problem Choose at least one digit occurrence from string num, leaving others unused if you wish. Rearrange the chosen digits into a palindrome and ret...

Coding & AlgorithmsGreedyArrays & Strings

Measure the Maximum Root-to-Leaf Depth of an N-ary Tree

Problem Given Node root, return the greatest number of nodes on a root-to-leaf path. An empty tree has depth zero. Node exposes val and vector<Node> c...

Coding & AlgorithmsTrees

10 people solved

How would you evaluate stolen-post detection?

You are interviewing for a Meta DSA (product analytics / data science) role. The product team is launching a new Stolen Post Detection algorithm that ...

Analytics & ExperimentationLaunch EvaluationMetrics & KPIs

Implement a thread-safe producer–consumer buffer

Implement a thread-safe producer–consumer buffer Bounded Blocking Buffer with Shutdown and Timeouts You are asked to design and implement a thread-saf...

System DesignConcurrencyData Structure Design

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...

Calculate Courier Earnings

Design a function to calculate total courier pay from a set of delivery orders. Assume time is represented as integer minutes, and intervals are half-...

Coding & AlgorithmsIntervals & SchedulingSorting

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)

44 people solved

Apr 4, 2026

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Tech Interview Questions

Find Unique One-Use Combination Sums with Negative Values

Solve meeting-room scheduling and shortest paths

Design Interval Membership Queries with Linear, Logarithmic, and Constant-Time Options

Build an Event-Driven Folder Browser

Find Path Between Fibonacci Tree Nodes

Scale a NoSQL Key–Value Store to One Million QPS

Swiggy Product Strategy: Getting Customers to Spend More per Order

Search for a Value in a Matrix Sorted as One Continuous Sequence

Design a logger that returns top-K messages

Choose and Defend a Betting Strategy Under Uncertain Odds

Design an order-matching engine

Decide and experiment on Group Call feature

Effective Permissions in an Inheritance DAG with Allow and Deny Lists

Build the Greatest Non-Leading-Zero Palindrome from Available Digits

Measure the Maximum Root-to-Leaf Depth of an N-ary Tree

How would you evaluate stolen-post detection?

Implement a thread-safe producer–consumer buffer

Design a URL Shortener

Calculate Courier Earnings

Campaign Efficiency Metrics and Below-Average CTR

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