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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
DoorDash logo
DoorDash
Medium
Software Engineer

Ask a New Team Useful Questions About AI Practices

You have just joined a team. What would you ask teammates about their use of AI tools, and how would those answers shape what you do next? Constraints...

Behavioral & LeadershipAI-Assisted Development
1
0
10 people solved
Oct 19, 2026
Anthropic logo
Anthropic
Hard
Software EngineerSenior+

Function-Call LRU Cache: Argument Key Generation and Crash Recovery from a Log

Build an LRU (least recently used) cache that memoizes function calls in Python. When a function is called with arguments whose result is already in t...

Software Engineering FundamentalsData Structure DesignDatabase Internals
3
0
57 people solved
Jul 26, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Design a Dependency-Aware Concurrent Tool Scheduler

Design a dependency-aware concurrent tool scheduler with validated per-agent DAGs, a global execution limit, fair ready queues, atomic state transitio...

Software Engineering FundamentalsJob Scheduling & WorkflowsConcurrency
29
0
299 people solved
Aug 16, 2026
OpenAI logo
OpenAI
Hard
Software Engineer Locked

Count Events in a Trailing 15-Minute Window with a Fixed-Size Ring Buffer

Implement an event counter that returns how many events occurred in the trailing 15 minutes, using a fixed-size ring buffer of per-second buckets so m...

Software Engineering FundamentalsData Structure Design
6
0
124 people solved
Sep 20, 2026
Google logo
GoogleMicrosoftAmazon

Also asked at Amazon, Box, Meta, Bloomberg, Oracle

Medium
Software Engineer

Remove the Last Input Edge on the Unique Cycle

Problem edges describes a connected undirected graph formed by adding one previously absent edge to a tree on vertices 1..n. Return an edge whose remo...

Coding & AlgorithmsGraphs
2
0
23 people solved
Amazon logo
Amazon
Easy
Business Intelligence Engineer Locked

Reason About Composite Join Keys and Predicate Placement

Reason about a two-column SQL join key and a right-side predicate without assuming a schema or join type. Compare inner- and left-join semantics, card...

Data Manipulation (SQL/Python)
7
0
141 people solved
Aug 14, 2026
Playstation logo
Playstation
Medium
Software Engineer

Refactor a Shopping Cart to Print Grouped, Promoted, Sorted Receipts

This object-oriented coding exercise has a 30-minute time box and starts from existing code. A ShoppingCart class keeps the items a customer has scann...

Software Engineering FundamentalsLow-Level Design (OOP)Code Quality & Maintainability
2
0
18 people solved
Oct 10, 2026
Amazon logo
Amazon
Medium
Software Engineer Locked

Design and Implement a Shopping Cart Object Model for an Online Store

An object-oriented design exercise that asks you to model and implement a shopping cart for an online store, covering adding, updating and removing pr...

Software Engineering FundamentalsLow-Level Design (OOP)
14
0
115 people solved
Sep 5, 2026
Amazon logo
Amazon
Medium
Software EngineerSenior+

Behavioral: a task outside your responsibilities and a very tight timeline

A technical phone screen began with a short behavioral segment. The interviewer asked two standard questions, one after the other, and expected a spec...

Behavioral & LeadershipOwnership & ExecutionAmbiguity & Decision Making
5
0
52 people solved
Sep 30, 2026
Amazon logo
AmazonGoogleMeta

Also asked at Meta, Bloomberg, Microsoft, Wissen Technology, Accolite, TikTok, Freshworks

Medium
Software Engineer

Keep at Most Two Copies in a Sorted Array Prefix

Problem The integer array nums is sorted in nondecreasing order. Modify it in place to retain at most two occurrences of each value, preserving their ...

Coding & AlgorithmsTwo Pointers & Sliding Window
0
0
12 people solved
SIG (Susquehanna) logo
SIG (Susquehanna)
Medium
Quantitative Trader

Probability You Picked the Strongest Cat Given Your Cat Lost the Race

Three cats run a race, and exactly one of them wins. Their probabilities of winning are $x$, $y$ and $z$, with $x + y + z = 1$. Before the race you pi...

Statistics & MathProbability
1
0
27 people solved
Sep 19, 2026
Google logo
GoogleMicrosoftBloomberg

Also asked at Bloomberg, Amazon, Meta, TCS, GitHub

Easy
Software Engineer

Recognize Positive Numbers with Only Three Allowed Prime Factors

Problem A positive ugly number has no prime factors outside 2, 3 and 5. Return whether n is ugly; 1 qualifies because it has no prime factors. `cpp bo...

Coding & AlgorithmsMath & Number Theory
0
0
17 people solved
Snapchat logo
Snapchat
Medium
Machine Learning Engineer

Resume ML Project Deep Dive: Loss, Training Data, Features, Architecture, Cold Start

Choose a machine learning project from your resume. The interviewer drills into it in detail and asks, in turn, about the loss function, how the train...

Machine LearningProject Deep DiveFeature Engineering
4
0
47 people solved
Sep 12, 2026
DoorDash logo
DoorDash
Medium
Software Engineer Locked

Build an Order-Exception Microservice with Explicit Refund Policies

Design and demonstrate a local service for missing or delayed orders, with explicit refund rules, duplicate handling, and auditable decisions.

Software Engineering FundamentalsPayments & LedgersAI-Assisted Development
8
0
158 people solved
Sep 10, 2026
Charta Health logo
Charta Health
Medium
Software Engineer Locked

Make Token-Bucket Admission Safe Across Threads

Explain thread-safe token-bucket admission through atomic refill and consumption, consistent clocks, correct waiting, and targeted concurrent race che...

Software Engineering FundamentalsConcurrencyRate Limiting
8
0
94 people solved
Aug 26, 2026
Spotify logo
Spotify
Hard
Software Engineer

Shortest Path Through an Obstacle Grid

Given an m by n grid of zeros and ones, a start cell, and a target cell, return the length of a shortest path that never enters a cell containing one....

Coding & AlgorithmsGrids & Matrices
0
0
9 people solved
Oct 18, 2026
Remitly logo
Remitly
Medium
Software Engineer Locked

Top Up Accounts Below a Threshold from Surplus Accounts and Log Each Transfer

Given a mapping of account IDs to balances and a threshold, move money from accounts above the threshold into accounts below it until every account re...

Software Engineering FundamentalsGreedyPayments & Ledgers
5
0
93 people solved
Sep 7, 2026
xAI logo
xAI
Medium
Machine Learning EngineerNew Grad Locked

Find All Faulty GPU Nodes with Parallel Group Tests That Cannot Share Nodes

An algorithm design question about finding every faulty GPU node when the only tool is a group test that fails if any node in the set is bad. Tests ne...

Software Engineering FundamentalsMath & Number Theory
4
0
78 people solved
Sep 5, 2026
Microsoft logo
MicrosoftAmazonGoogle

Also asked at Google, Meta, Zoho

Easy
Software Engineer

Reverse Characters Inside Each Sentence Word

Problem Reverse the characters of every word in s while keeping the words in their original order and every separating space in place. Printable ASCII...

Coding & AlgorithmsArrays & Strings
3
1
29 people solved
Databricks logo
Databricks
Hard
Software Engineer Locked

Design a Music Playlist Service

Design a playlist service for creating lists, adding or removing tracks, reordering items, and reading deterministic playback order. Examine retry-saf...

System DesignSystem Design FundamentalsDistributed Transactions & Idempotency
51
0
463 people solved
Jul 25, 2026
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