Interview Questions
Practice the exact questions companies are asking right now.
Questions
9.8k
Companies
520
Updated
08.21.2026
9.8k Questions 520 Companies08.21.2026
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."
Showing 20 results
Role
Medium
Software Engineer LockedCompute sliding-window average excluding top k
This question evaluates a candidate's understanding of sliding-window algorithms, order-statistics maintenance, and data-structure techniques for incr...
Coding & Algorithms
8
0
68 people solved
Oct 5, 2025
Medium
Product ManagerDescribe your key projects and impact
For a TikTok platform Product Manager interview, prepare to introduce yourself and walk through past work in depth. The interviewer wants to assess ow...
Behavioral & Leadership
8
0
69 people solved
Oct 6, 2024
Medium
Software EngineerDesign a real-time ad impression aggregator
Design an ads impression aggregator service with the following requirements: - The system ingests a high-volume stream of impression events (each even...
System Design
3
0
33 people solved
Oct 2, 2025
Medium
Software EngineerImplement matrix multiplication and fast exponentiation
1) - A n × m - B m × p C = A × Bn × p - - - MOD MOD 2) Exponentiation by Squaring x k MOD - x^k - x^k mod MOD - O(log k) - k = 0x = 0 3) ...
Coding & Algorithms
9
0
68 people solved
Oct 2, 2025
Medium
Software EngineerExplain Java concurrency and fix i++ race
Java 1. Java - ThreadRunnable/Callable - Java Memory Model - volatilesynchronizedLockAtomic* 2. i++ “/lost update” 3. - i++ - 4...
Software Engineering Fundamentals
4
0
36 people solved
Oct 2, 2025
Medium
Data ScientistSenior+Predict Seller Intent From Subscription Data
You are given a take-home dataset, seller_intent_take_home_dataset.csv, containing about 5,000 new subscription records from a website-building platfo...
Machine Learning
4
0
30 people solved
Oct 1, 2024
Hard
Software EngineerMaximize total bandwidth of data channel pairs
You are optimizing how information flows through a network of processing nodes. There are n processing nodes. The bandwidth capability of the i-th nod...
Coding & Algorithms
3
0
37 people solved
Oct 1, 2025
Medium
Software Engineer LockedImplement a recent-use eviction cache
This question evaluates a candidate's ability to design and implement a fixed-capacity key-value cache with a recent-use eviction policy, emphasizing ...
Coding & Algorithms
1
0
28 people solved
Sep 29, 2025
Medium
Machine Learning EngineerFind longest substring without repeating characters
Problem Given a string s, find the length of the longest contiguous substring that contains no repeated characters. Input - A string s (may contain le...
Coding & Algorithms
2
0
39 people solved
Sep 29, 2025
Easy
Data ScientistIntern LockedCompute multi-step Markov probabilities and estimate transitions
This question evaluates understanding of discrete-time Markov chains, computation of multi-step transition probabilities from a one-step transition ma...
Statistics & Math
3
0
31 people solved
Sep 28, 2025
Easy
Data ScientistCheck if a numeric string is divisible by 8
Question You are given a very large non-negative integer represented as a decimal string s (it may be too large to fit in standard 64-bit integer type...
Coding & Algorithms
5
0
38 people solved
Sep 28, 2025
Medium
Software Engineer LockedImplement a Log Rate Limiter
This question evaluates a candidate's ability to design and implement time-based rate limiting and stateful event tracking using appropriate data stru...
Coding & Algorithms
8
0
80 people solved
Sep 25, 2025
Medium
Data Scientist LockedDiagnose rising cold-food complaints and choose metrics
This question evaluates a data scientist's diagnostic analytics skills, including hypothesis generation, causal inference, metric engineering, and A/B...
Analytics & Experimentation
5
0
90 people solved
Sep 25, 2025
Easy
Software EngineerDesign a time-windowed key-value store
Implement a time-windowed key-value store ("Windowed Map") that receives key/value updates at irregular times and only keeps entries from the most rec...
Coding & Algorithms
8
0
106 people solved
Mar 4, 2025
Medium
Software EngineerApply commands to transform a matrix
You are given an integer matrix A of size n × m and a list of string commands to apply in order. Implement the commands and return the final matrix. C...
Coding & Algorithms
13
0
90 people solved
Sep 19, 2025
Medium
Data ScientistCompute square root to 1 decimal
Problem Given a non-negative real number x, implement a function sqrt1dp(x) that returns \(\sqrt{x}\) rounded (or truncated—clarify with interviewer) ...
Coding & Algorithms
15
0
109 people solved
Sep 16, 2025
Medium
Data EngineerCompute shipping cost with tiered pricing
You are building a shipping-cost calculator. Each order contains line items, and shipping rules vary by destination country and product. Assume: - Ord...
Coding & Algorithms
3
0
39 people solved
Feb 16, 2025
Medium
Data ScientistInternLinear Interpolator with Extrapolation
Linear Interpolator with Extrapolation You are given n knot points in a 2D coordinate system, where knots[i] = [x_i, y_i]. All x-coordinates are disti...
Coding & Algorithms
8
0
57 people solved
Sep 10, 2025
Medium
Software EngineerImplement stream line reader and settle balances
Part 1: Streaming line reader from chunked source You are given an existing class ChunkSource with a method nextChunk() that returns the next piece of...
Coding & Algorithms
24
0
203 people solved
Sep 10, 2025
Medium
Data ScientistEstimate percentile from buckets
You are given an approximate histogram of search-query frequencies. Each bucket i is represented as (left_bd_i, right_bd_i, bucket_count_i), where buc...
Statistics & Math
10
0
72 people solved
Feb 5, 2025