Intern Interview Questions
Internship interviews lean hardest on fundamentals: arrays and strings, hash maps, two pointers, recursion, and the occasional graph or DP warm-up — usually one or two rounds plus a behavioral chat. These questions were all reported by candidates interviewing for intern roles, so they reflect the real difficulty band rather than the senior-level problems that flood generic lists. If you're prepping for a summer internship, this is the slice to drill: enough range to be ready for anything an intern loop throws, without burning time on niche topics that rarely come up at this level. Most questions include a step-by-step solution so you can check your approach.
"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."
Relate coefficients under linear feature transformation
This question evaluates understanding of linear regression parameter relationships under linear feature transformations, model equivalence and identif...
Four Fair Coins: Expected Payoff and Pricing Two Magic Wands
You play the following game: four fair coins are tossed at the same time. For every coin that lands heads, you are paid \$1. The interviewer walks you...
Design Rideshare Marketplace Causal Analyses
You are a data scientist at a ride-hailing marketplace. Answer the following case prompts as if you were advising product, operations, and marketplace...
Explain the MVC architectural pattern
Explain the Model–View–Controller (MVC) architectural pattern. Include in your answer: 1. What each component is responsible for: - Model - View...
Clarify internship availability and conversion
Software Engineering Internship Availability and Conversion Context: During a technical screen for a Software Engineer internship, the interviewer nee...
Find a valid dependency order
You are given n tasks labeled from 0 to n - 1 and a list of dependency pairs dependencies, where each pair [a, b] means task b must be completed befor...
Describe handling deadlines, pride, and conflict
Behavioral questions Answer the following interview prompts with concrete examples from your past work/school/internships: 1. Tight deadline: Tell me ...
Explain Core CS and Database Concepts
The interview included a fundamentals discussion covering topics like: - Explain common data structures and when you would choose arrays, linked lists...
Implement Prefix Search and Node Removal
This interview included two coding tasks: 1. Implement a prefix-search data structure for strings with two operations: insert(word) and count_with_pre...
Pick a Number 1-100 Where the Higher Pick Pays a 10-Point Penalty: Optimal Strategy
Two players simultaneously each pick an integer from 1 to 100 (inclusive). The winner is decided as follows: take the larger of the two picks, subtrac...
Relate coefficients under linear feature transformation
Suppose you are fitting a linear regression model and you consider two different feature parameterizations. Original features: x1, x2. Transformed fea...
Explain timing and testability concepts
For a digital implementation or backend-focused interview, explain the following concepts: 1. What are setup time and hold time? 2. How does clock ske...
Explain inheritance, polymorphism, constructors, destructors
This question evaluates understanding of object-oriented programming concepts—specifically inheritance, polymorphism, constructors, and destructors—an...
Design a basic credit card system
This question evaluates object-oriented design and domain modeling skills, including class responsibilities, relationships, state management, transact...
Describe debugging approach for software issues
Describe how you typically debug an issue in a software application. Include in your answer: 1. How you first narrow down the problem (reproducing the...
Diagnose and fix multicollinearity in income regression
You want to estimate the relationship between gender and income using a regression model, while controlling for other covariates such as: - age - educ...
Design a logger that returns top-K messages
This question evaluates skills in designing in-memory data structures and algorithms for frequency counting and interval querying, including extractin...
Find minimum total range-increment to sort
This question evaluates algorithmic problem-solving skills in array manipulation and optimization, focusing on reasoning about range-increment operati...
Five Pumpkins Weighed in Every Pair: Find the Total Weight
You have 5 pumpkins. You weigh them two at a time, in every possible pairing, and the scale readings for the ten pairs are: $$21,\ 22,\ 23,\ 24,\ 25,\...
Solve tree diameter and grid path problems
You are interviewing for a software engineer / ML intern role and are given the following algorithmic problems. --- Question 1: Longest Path in a Tree...