Machine Learning Engineer + Data Scientist + Software Engineer Interview Questions
Practice the exact questions companies are asking right now.
"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"
"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"
"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."
"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."
"Got a Google recruiter call on Monday, interview on Friday. Crammed PracHub for 4 days. Passed every round. This platform is a miracle worker."
"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."
"The solution quality is insane. It covers approach, edge cases, time complexity, follow-ups. Nothing else comes close."
"Legit the only resource you need. TC went from 180k -> 350k. Just memorize the top 50 for your target company and you're golden."
"PracHub Premium for one month cost me the price of two coffees a week. It landed me a $280K+ starting offer."
"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."
"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."
"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."
"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."
"I recently cleared Uber interviews (strong hire in the design round) and all the questions were present in prachub."
"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."
Design a file sync and sharing service
This question evaluates system design competency, covering distributed storage architecture, synchronization protocols, conflict resolution and versio...
Assign tennis bookings to minimum courts
This question evaluates understanding of interval scheduling and temporal resource allocation, testing algorithm design, complexity analysis, and appr...
Design a CI/CD release notification service
This question evaluates object-oriented design skills, modeling of releases and changes, notification and event-driven system reasoning, and handling ...
Implement an LRU cache
This question evaluates understanding of data structures and algorithmic optimization for constant-time cache operations, with emphasis on cache evict...
Filter ads by a single rule
This question evaluates understanding of rule-based filtering for a single-rule ad filter, including set containment for locations, numeric range chec...
Find longest common subsequence length
This question evaluates understanding of dynamic programming and sequence comparison algorithms by asking for the length of the longest common subsequ...
Implement banking, knapsack, and pagination tasks
This multi-part question evaluates stateful system design, ordered event processing and scheduling semantics for an in-memory banking command processo...
Build a hit/miss word guessing game
This question evaluates implementation skills in managing stateful systems and data structures for pattern matching, as well as algorithmic and advers...
Scale a file-crawling API using async jobs
This question evaluates a candidate's ability to design scalable, fault-tolerant systems for long-running file-crawl operations, including async job o...
Implement a debounced function (with leading option)
This question evaluates mastery of debouncing patterns, timer-based asynchronous control, closures, and preservation of function context and arguments...
Implement a parallelized sort
This question evaluates understanding of parallel algorithms, shared-memory concurrency primitives, synchronization, workload partitioning, and perfor...
Solve two grid problems (islands + min-cost path)
This pair of problems evaluates grid-based algorithm competencies, specifically connected-component detection and translation-invariant shape recognit...
Implement array merge, round-robin scheduler, and trading simulator
This multipart problem evaluates algorithmic problem solving and systems-design competencies including in-place array manipulation, queue-based schedu...
Compute balances with transaction fees and rejections
This question evaluates transaction processing, ledger state management, handling of edge cases like insufficient funds and fixed fees, and efficient ...
Implement a rate limiter at scale
This question evaluates understanding of algorithmic and system-level design for per-key rate limiting, including data structures, time/space complexi...
Compute bus-on-time and dice-sum probabilities
This question evaluates understanding of probability concepts including a continuous uniform waiting-time model for bus arrivals and discrete outcome ...
Print all odd numbers from an integer list
This question evaluates proficiency with array/list manipulation, parity checking, and handling edge cases such as negative values and integers outsid...
Merge overlapping intervals
This question evaluates understanding of interval manipulation, array processing, and algorithmic efficiency by requiring reasoning about overlapping ...
Design a rating aggregator that returns totals and averages
This question evaluates a candidate's competency in designing and implementing data structures and algorithms for maintaining dynamic aggregates (tota...
Check if one string is a subsequence of another
This question evaluates understanding of string algorithms and subsequence detection, focusing on sequence traversal, edge-case handling, and time/spa...