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Tech Interview Questions

Practice the exact questions companies are asking right now.

Questions
11.9k
Companies
570
Updated
10.05.2026
11.9k Questions 570 Companies10.05.2026
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
Google logo
Google
Hard
Machine Learning Engineer

Explain Importance Sampling in LLM Training

Explain Importance Sampling in LLM Training Define importance sampling and explain how it supports estimation under one distribution using samples fro...

Machine Learning
3
0
55 people solved
Aug 14, 2026
Hudson River Trading logo
Hudson River Trading
Medium
Site Reliability Engineer Locked

Reason About Unix Signals, Zombies, and Process Reaping

Explain Unix signal delivery, the practical difference between SIGTERM and SIGKILL, how zombie processes arise, and how parents or PID 1 reap them dur...

Software Engineering Fundamentals
5
0
48 people solved
Aug 16, 2026
Tekion logo
Tekion
Medium
Software EngineerSenior+

Count Open Lockers After 100 Rounds

A hallway contains 100 lockers, numbered 1 through 100. All begin closed. - In round 1, open every locker. - In round 2, close every second locker. - ...

Statistics & MathMath & Number TheoryPuzzles & Brainteasers
2
0
21 people solved
Sep 10, 2026
Hudson River Trading logo
Hudson River Trading
Easy
Software EngineerIntern Locked

Check Root-To-Leaf Target Sums In A Binary Tree

Practice a binary tree path-sum interview problem that asks whether any root-to-leaf path reaches a target value, including empty trees, single-node t...

Coding & Algorithms
14
0
111 people solved
Jul 3, 2026
Sig logo
Sig
Easy
Data Scientist

Solve Barn Animal Counts from Total Legs

Solve Barn Animal Counts from Total Legs A barn contains ants, cows, and chickens with 570 legs in total. The number of ants is twice the number of ch...

Statistics & Math
3
0
24 people solved
Aug 16, 2026
Voleon logo
Voleon
Easy
Data Scientist Locked

Analyze a Regression Dataset and Build a Safe File-Processing Utility

A combined data-analysis and Python engineering interview. Candidates must diagnose a regression dataset, choose suitable validation and metrics, then...

Data Manipulation (SQL/Python)Regression & Statistical ModelingFeature Engineering
6
1
132 people solved
Jun 1, 2026
ZipHQ logo
ZipHQ
Medium
Backend Engineer Locked

Find Bugs in an LRU Cache

Find the behavioral defects in a Java LRU cache built with LinkedHashMap and provide minimal failing tests. Correct access ordering, update recency, l...

Software Engineering FundamentalsDebuggingData Structure Design
19
1
158 people solved
Jul 4, 2026
Okta logo
Okta
Medium
Software Engineer

Behavioral: How You Use AI, Lead Engineers, and Work with Another Team or PM

This behavioral segment takes about the first 25 minutes of a one-hour technical phone screen for a software engineering role; the rest of the hour is...

Behavioral & LeadershipLeadership & InfluenceConflict & Collaboration
0
0
6 people solved
Sep 15, 2026
Pinterest logo
Pinterest
Medium
Software Engineer

Extend an Existing Endpoint Cache and Prove It with Tests

Extend an Existing Endpoint Cache and Prove It with Tests You inherit a service in which one endpoint already uses a shared cache interface and a simi...

Software Engineering Fundamentals
3
0
38 people solved
Aug 16, 2026
Capital One logo
Capital One
Medium
Machine Learning Engineer

Solve Four Coding Assessment Tasks

Complete the following four independent coding tasks. 1. Find the day a cumulative visit target is reached You are given an array visits, where visits...

Coding & Algorithms
9
0
123 people solved
Apr 13, 2026
Pinterest logo
Pinterest
Medium
Software Engineer Locked

Reconstruct an Itinerary from Flight Tickets

Reconstruct an itinerary starting at JFK that uses every flight ticket exactly once, including duplicate tickets and cycles. When several complete iti...

Coding & AlgorithmsGraphsSorting
22
0
149 people solved
Aug 7, 2026
Rippling logo
Rippling
Medium
Software Engineer AI

Compare Complete or Partial Hands

Implement a hand comparison engine for a simplified poker-like card game. Each player has a hand represented by an array of card strings. A card is en...

Coding & AlgorithmsBacktracking & Recursion
23
0
237 people solved
Mar 14, 2026
Imc logo
Imc
Easy
Hardware Engineer Locked

Diagnose a PyTorch Training Bottleneck from Profiler Traces

Use PyTorch profiler traces to distinguish input starvation, CPU launch overhead, synchronization, CUDA kernels, memory limits, and distributed commun...

Machine Learning
4
0
32 people solved
Aug 24, 2026
Baseten logo
Baseten
Hard
Software Engineer Locked

Build a Crash-Consistent Single-Server Key-Value Store

Build a multithreaded single-server key-value store for byte-string keys and values on a local filesystem. Reason about record framing, tombstones, du...

Software Engineering FundamentalsKey-Value StoresDatabase Internals
14
0
175 people solved
Jul 26, 2026
Whatnot logo
Whatnot
Medium
Software Engineer Locked

Design a Charity Donation Website

This question evaluates system architecture and reliability engineering skills, focusing on payment integration, asynchronous processing, idempotency,...

System DesignPayments & LedgersDistributed Transactions & Idempotency
41
0
322 people solved
May 30, 2026
AMD logo
AMD
Medium
Software Engineer

Explain Cache Conflicts and Related Memory-Access Problems

Explain a cache-line conflict using an address-level example, then distinguish it from false sharing and GPU shared-memory bank conflicts. Constraints...

Software Engineering FundamentalsMemory ManagementConcurrency
0
0
14 people solved
Sep 14, 2026
DocuSign logo
DocuSign
Easy
Software Engineer Locked

Compress Consecutive Integer Ranges

Practice sorting and compressing integers into a canonical comma-separated representation of maximal consecutive ranges.

Coding & Algorithms
2
0
27 people solved
Aug 27, 2026
Airbnb logo
Airbnb
Medium
Software Engineer Locked

Allocate an Order from the Oldest Inventory Batches

Allocate an order from inventory batches in oldest-first order without mutating the input, honoring the reference-ID tie-break and reporting both per-...

Coding & Algorithms
8
0
97 people solved
Aug 1, 2026
ByteDance logo
ByteDance
Medium
Software Engineer

Design a Monitoring Dashboard with Explicit Latency Goals

Design a monitoring dashboard that displays incoming measurements with attention to latency. Explain both how quickly new measurements become visible ...

System DesignObservabilityBatch & Stream Processing
2
0
18 people solved
Sep 15, 2026
Goldman Sachs logo
Goldman Sachs
Medium
Software Engineer

Count segments and optimize 3-server assignment

There are two independent programming tasks. --- Problem 1: Transaction Segments You are given: - An integer n, the length of an array. - An integer k...

Coding & AlgorithmsTwo Pointers & Sliding Window
48
2
658 people solved
Dec 7, 2025
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