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."
Evaluate NLP Classification Models
You are interviewing for a Data Scientist internship at Amazon. The interviewer asks you to walk through how you think about an NLP classification pro...
Solve Bracket Matching and Tree Width
This composite question evaluates proficiency with core data structures and algorithmic reasoning, covering string-based bracket validation (sequence ...
Optiver SWE Intern HR Screen: Project Deep Dive — Hardest Parts, What You'd Do Differently, and Questions to Ask
You are on a 20–30 minute recruiter (HR) phone screen for a Software Engineering Intern position at Optiver, a high-frequency trading firm. The call s...
Teach a New Technical Concept to an Undergraduate
Teach a New Technical Concept to an Undergraduate Imagine the interviewer is an undergraduate who has completed an introductory programming course but...
Estimate ATE of personalization on streaming
You are given a user-level dataset from an online experiment that randomized personalization (treatment) vs no personalization (control). Assume one r...
Answer Amazon Leadership Principle Scenarios
In an Amazon Data Scientist intern virtual interview, answer behavioral questions using the STAR method and tie each story to Amazon Leadership Princi...
Answer Amazon Behavioral Questions
Question You are in the behavioral portion of an Amazon final-round interview (Software Development Engineer internship). Prepare strong, structured r...
Design a RAG system with agentic tools
Design a Retrieval-Augmented Generation (RAG) question-answering system for an enterprise knowledge base. Requirements: - Users ask natural-language q...
How would you forecast bike demand?
This question evaluates a candidate's competency in time-series forecasting, feature engineering, model selection, and evaluation for short-horizon de...
Explain Joins and Write Coupon SQL
This question evaluates proficiency in SQL fundamentals—logical execution order of query clauses, join semantics (INNER/LEFT/RIGHT), timezone-aware ti...
How would you handle common analyst workplace scenarios?
You are interviewing for an Analyst role. The online assessment (OA) focuses on behavioral/situational judgment and written communication rather than ...
Describe ETL and pipeline challenges
Question You are interviewing for a Data Engineer co-op / intern role at RBC (Royal Bank of Canada). The technical screen is a set of resume-based and...
Answer common Amazon behavioral questions
You are interviewing for a software engineering internship. Prepare strong answers (using the STAR framework) for the following behavioral questions: ...
How would you answer a DS video interview?
Question You are interviewing for a Data Scientist Intern role at TransUnion. The technical screen is an asynchronous (one-way) video interview: you a...
Explain conflict, ownership, and AI use
Question Prepare structured answers for an Amazon-style behavioral interview (intern / early-career software engineer) that probes leadership-principl...
Alternating Die-Roll Game: Optimal Accept/Reject Strategy
Two players, A and B, play the following game with a fair 21-sided die whose faces are labeled with the integers $-10, -9, \ldots, 9, 10$ (one integer...
Linear 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...
Solve three algorithmic OA problems
This is an online assessment (Codility-style, 150 minutes) consisting of three independent coding problems. Solve each one separately; they do not sha...
Explain Python and Systems Fundamentals
Answer the following software engineering fundamentals questions: 1. A production system has become very slow. How would you detect the bottleneck, me...
Build a Housing Price Prediction Model from Historical Data
You are given a historical dataset of residential real-estate transactions — sale records with property attributes, location information, and sale dat...