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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
Instalily logo
Instalily
Easy
Software Engineer

Describe Your Proudest Project and Its Hardest Challenge

What project are you most proud of, and what was the hardest part of building it? What a Strong Answer Covers A specific example, your personal action...

Behavioral & LeadershipProject Deep Dive
0
0
3 people solved
Oct 19, 2026
Applied Intuition logo
Applied Intuition
Medium
Machine Learning Engineer

Implement a Fixed-Capacity Deque

Design and implement a fixed-capacity double-ended queue. The data structure is initialized with an integer capacity k and must support the following ...

Coding & Algorithms
16
0
115 people solved
Apr 14, 2026
Uber logo
UberTikTokGoogle

Also asked at Google, Amazon, Bloomberg, Apple, Microsoft

Medium
Software Engineer

Encode an N-ary tree as a string and decode it back to the identical tree

A rooted N-ary tree is a tree in which each node can have any number of children, kept in a fixed order. Design a string format for such trees and imp...

Software Engineering FundamentalsTreesParsing & Interpreters
1
0
21 people solved
Reddit logo
Reddit
Medium
Software Engineer Locked

Merge Message Context Windows

This question evaluates a candidate's skill in designing efficient algorithms and appropriate data-structure use for merging overlapping message conte...

Coding & AlgorithmsIntervals & Scheduling
35
1
290 people solved
Jan 23, 2026
Google logo
GoogleBloombergAmazon
Easy
Software Engineer

Construct a Permutation Matching Consecutive Increase and Decrease Signs

Problem For n = s.length, return any permutation of all integers0 through n whose adjacent comparisons match s. An I requires perm[i] < perm[i+1]; a D...

Coding & AlgorithmsGreedyTwo Pointers & Sliding Window
0
0
15 people solved
Anthropic logo
Anthropic
Hard
Software Engineer

Design a concurrent web crawler

Question Design and implement a concurrent web crawler. Starting from one or more seed URLs, the crawler should fetch pages, extract links, deduplicat...

System DesignConcurrency
65
0
444 people solved
Sep 6, 2025
Plaid logo
Plaid
Medium
Machine Learning Engineer

Find Banks From Identifier Mappings

Plaid receives institution metadata from multiple sources. You are given two mappings: 1. code_to_institution: a one-to-one mapping from a bank code t...

Coding & Algorithms
12
0
177 people solved
Apr 30, 2026
Harvey logo
Harvey
Medium
Software Engineer Locked

Design a RAG question-answering system

This question evaluates system design and machine-learning engineering competencies for building Retrieval-Augmented Generation (RAG) systems, includi...

System DesignRetrieval-Augmented GenerationLLM Applications
24
0
441 people solved
Mar 1, 2026
Databricks logo
Databricks
Medium
Software Engineer Locked

Design a Slack-Like Messaging System

This question evaluates a candidate's ability to architect a real-time team messaging platform, testing competencies in distributed systems, data mode...

System DesignReal-Time SystemsMessaging & Event-Driven
58
0
512 people solved
May 14, 2026
Meta logo
Meta
Hard
Software Engineer AI

Solve Two Backtracking Array Problems

You will solve two independent coding problems. For each problem, first discuss edge cases, then implement a correct solution, and finally explain how...

Coding & AlgorithmsBacktracking & RecursionTwo Pointers & Sliding Window
45
0
370 people solved
Apr 27, 2026
Microsoft logo
Microsoft
Hard
Software Engineer

Top k most frequent values with a deterministic tie order

Given a list of integers and a number k, return the k values that occur most often in the list. The report names this problem without further detail; ...

Coding & AlgorithmsHeaps & Priority QueuesSorting
0
0
11 people solved
Aug 5, 2026
Google logo
GoogleMetaMicrosoft

Also asked at Microsoft, Amazon, Bloomberg, TikTok

Medium
Software Engineer

Enumerate Every Independent Letter-Case Choice

Problem For each English letter in s, independently choose uppercase or lowercase; digits stay unchanged. Return every distinct resulting string in an...

Coding & AlgorithmsBacktracking & RecursionArrays & Strings
1
0
8 people solved
SIG (Susquehanna) logo
SIG (Susquehanna)
Easy
Data Scientist Locked

Find the Success Probability of Bold Betting

Calculate the chance of reaching five tokens before ruin under a bold, state-dependent betting rule. The solution enumerates the transitions, sets abs...

Statistics & Math
4
0
37 people solved
Aug 16, 2026
Anthropic logo
Anthropic
Medium
Product Manager

Hallucination Playbook for a Live LLM Product: Measurement, Safeguards and UX

A generative AI model is live in a product that real people use, and it sometimes hallucinates. How would you handle that? `hint Tie the response to t...

Machine LearningAI Product ManagementLLM Applications
2
0
24 people solved
Apr 12, 2026
Akuna Capital logo
Akuna Capital
Hard
Software Engineer Locked

Design a Tiered Expiring Item Store

Design a tiered in-memory item store that places weighted items under capacity limits and retrieves from the highest-priority eligible level while res...

Software Engineering Fundamentals
13
0
123 people solved
Aug 12, 2026
LinkedIn logo
LinkedInBloombergGoogle

Also asked at Google, Meta, Amazon, Microsoft, SAP

Medium
Software Engineer

Check Whether an Integer Is a Perfect Square

Perfect Square Check Given a positive integer n, determine whether it is a perfect square (i.e., there exists an integer x such that x*x = n). Require...

Coding & AlgorithmsBinary Search
15
2
202 people solved
InMobi logo
InMobiAmazonGoogle

Also asked at Google, Meta, TikTok, Microsoft, Bloomberg, Oracle

Medium
Software Engineer

Count Subarrays Containing Exactly k Odd Values

Problem Return the number of nonempty contiguous subarrays of nums containing exactly k odd elements. Even elements may appear anywhere within those i...

Coding & AlgorithmsArrays & StringsTwo Pointers & Sliding Window
1
0
10 people solved
Coreweave logo
Coreweave
Medium
Software Engineer Locked

Represent and Evaluate Boolean Predicate Expressions

This Coreweave software engineering question asks candidates to represent and evaluate boolean predicate expressions. It is useful practice for expres...

Software Engineering FundamentalsParsing & InterpretersData Structure Design
21
0
224 people solved
Jul 2, 2026
Roblox logo
Roblox
Medium
Software Engineer Locked

Implement a Rolling-Window Rate Limiter

Implement a single-process rolling-window rate limiter where only accepted requests consume capacity. Define exact boundary behavior, expire old times...

Software Engineering FundamentalsData Structure DesignRate Limiting
82
2
588 people solved
Jul 13, 2026
Adyen logo
Adyen
Easy
Machine Learning Engineer AI Locked

Build a Payment Fraud Detection Model

This question evaluates a candidate's competency in applied machine learning for payment fraud detection, covering data preprocessing, temporal train/...

Machine LearningML System DesignModel Evaluation
37
0
719 people solved
May 9, 2026
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