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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
C3 AI logo
C3 AI
Medium
Data ScientistIntern

Explain Training R-Squared After Adding a Random Feature

Explain Training R-Squared After Adding a Random Feature For an ordinary least-squares linear regression fitted on the same training observations, wha...

Statistics & MathRegression & Statistical ModelingModel Evaluation
4
0
31 people solved
Sep 15, 2026
Glean logo
Glean
Medium
Frontend Engineer

Implement Two-Player Connect Four on a 6x7 Board with Win and Draw Detection

In the first technical round of a frontend engineer loop, the task was to implement Connect Four on a 6 x 7 board (6 rows, 7 columns) for two players....

Software Engineering FundamentalsSimulation & State MachinesReact & UI Frameworks
4
0
30 people solved
Sep 30, 2026
Instacart logo
Instacart
Medium
Software Engineer

Implement Search and Filters, Then Diagnose a Query-Ordering Bug

Build search and filtering for an existing web application using a React client and a Python FastAPI backend. Start by eliciting the missing requireme...

Software Engineering FundamentalsDebuggingReact & UI Frameworks
3
0
66 people solved
Sep 7, 2026
Google logo
GoogleNetflixMicrosoft

Also asked at Microsoft, Amazon, Bloomberg, Meta

Hard
Software Engineer

Detect a Bounded-Index Pair with Near-Equal Values

Problem Return whether there are distinct indices i,j satisfying both abs(i-j) <= indexDiff and abs(nums[i]-nums[j]) <= valueDiff. Either equality or ...

Coding & AlgorithmsTwo Pointers & Sliding WindowTrees
1
0
16 people solved
Two Sigma logo
Two Sigma
Medium
Software EngineerNew Grad Locked

Allocate IPO Shares and Split a Weighted Tree

Solve two independent coding tasks: distribute limited IPO shares under price and round-robin rules, then choose a cut that best divides a weighted ro...

Coding & AlgorithmsTreesSimulation & State Machines
21
0
287 people solved
Jun 28, 2026
Mercor logo
Mercor
Medium
Software Engineer

Debug a Java CSV Export Function for Output and Performance Bugs

You are given a small Java utility that turns a table of string fields into CSV text for another system to import, and it is used for large exports. F...

Software Engineering FundamentalsDebuggingProgramming Languages
2
0
30 people solved
Oct 4, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Software Engineer Locked

Calculate Completion Time for a Single-Server Reactor Queue

This Hudson River Trading coding question focuses on queue simulation for a single-server process with arrival times and task durations. It helps cand...

Coding & Algorithms
26
1
250 people solved
Jul 2, 2026
Harvey logo
Harvey
Medium
Product Manager

Personal AI Habits: Concrete Uses, How You Verify Output and Limits You Hit

Outside of your job, how does AI fit into your everyday life? Give a few specific examples. `hint Pick uses that show judgment Choose two or three use...

Behavioral & Leadership
1
0
16 people solved
Oct 13, 2026
Netflix logo
Netflix
Medium
Software Engineer

Recommend New Friends from a Mutual-Friendship Graph and Scale the Approach

This round is framed as problem solving rather than pure coding. The interviewer asks you to work out how a social product should suggest new friends ...

Software Engineering FundamentalsGraphsHeaps & Priority Queues
1
0
27 people solved
Aug 31, 2026
Robinhood logo
Robinhood
Medium
Backend Engineer

Design a Cron Scheduler with At-Least-Once Delivery and Independent Monitoring

Design a job scheduler for recurring cron jobs only. The delivery guarantee is at least once. Explain monitoring, log storage, and how transactions an...

System DesignJob Scheduling & WorkflowsDistributed Transactions & Idempotency
1
0
12 people solved
Sep 29, 2026
Mixpanel logo
Mixpanel
Medium
Data Scientist

Aggregate User Events and Check Join Uniqueness

Build a User Activity Summary from Event Data You have two tables. The intended user summary contains one row per user_id, and the users table provide...

Data Manipulation (SQL/Python)SQL
6
0
49 people solved
Sep 9, 2026
Meta logo
MetaGoogleMicrosoft

Also asked at Microsoft, Bloomberg, Amazon, Oracle

Medium
Software Engineer

Delete a Non-Tail Value through Its Supplied Node

Problem You receive only the node to delete from a singly linked list, not the head. The node is not the tail. Remove its value, reduce the list lengt...

Coding & AlgorithmsLinked Lists
1
0
16 people solved
Databricks logo
Databricks
Medium
Software Engineer Locked

Design a Customer Revenue Index with Referrals and Threshold Queries

Design a customer revenue index that credits direct referrals and supports thresholded lowest-total queries through authoritative records and atomic r...

Software Engineering FundamentalsData Structure Design
23
0
376 people solved
Aug 24, 2026
Google logo
GoogleMetaAmazon

Also asked at Amazon, Microsoft, Bloomberg, TCS, Accenture, IBM, Yandex, Cognizant

Easy
Software Engineer

Report Employees Whose Pay Exceeds Their Manager’s

Problem Find each employee whose salary is strictly greater than the salary of the manager identified by managerId. Return the employee name in a colu...

Data Manipulation (SQL/Python)SQL
1
0
12 people solved
Mercor logo
Mercor
Medium
Software Engineer

Stripe Payment Integration: Error Handling, Idempotent Retries and Payment Storage

Your backend service needs to start charging customers through Stripe, a third-party payments API. The interviewer asks you to add a Stripe integratio...

Software Engineering FundamentalsAPI Integration & HTTP ClientsDistributed Transactions & Idempotency
6
0
125 people solved
Sep 17, 2026
Cisco logo
Cisco
Easy
Software Engineer

Explain BGP: Sessions, Route Exchange, and Best-Path Selection

Explain the Border Gateway Protocol (BGP). Cover what problem it solves, how two routers establish a BGP session and exchange routes, how a router cho...

Software Engineering FundamentalsNetworking
2
0
32 people solved
Sep 19, 2026
Microsoft logo
Microsoft
Easy
Software Engineer

Rank the Criteria for Evaluating Eight Candidates Competing for One Role

Suppose eight candidates are applying for the same position. What would you evaluate them on? Rank your criteria in order of importance. `hint The ran...

Behavioral & LeadershipMentoring & Team Growth
3
0
29 people solved
Sep 30, 2026
Google logo
GoogleAmazonMeta

Also asked at Meta, Bloomberg, Microsoft, Criteo, MongoDB, Accenture, Yandex, JPMorgan Chase, Apple, Zoho

Easy
Software Engineer

Return Distinct Values Shared by Two Arrays

Problem Return every value that appears in both nums1 and nums2, exactly once. The source accepts any output order. `cpp vector<int> intersection(vect...

Coding & AlgorithmsArrays & Strings
1
0
16 people solved
Plaid logo
Plaid
Medium
Software Engineer Locked

Count Completed Jobs in a Serial Single-Worker Pipeline

Calculate how many jobs finish before a deadline in a serial, stage-gated, single-worker pipeline. The prompt tests cumulative-time reasoning, partial...

Coding & AlgorithmsSimulation & State MachinesArrays & Strings
41
0
341 people solved
Jul 13, 2026
Palantir logo
Palantir
Easy
Software Engineer

Design a Server Metrics Monitor

Design a server metrics monitoring system that periodically pulls metrics from a fleet of servers and makes them available for dashboards and alerting...

System DesignObservabilityConcurrency
44
0
772 people solved
Mar 8, 2026
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