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."
Coin-Flip Race to Four: Game Length and a Conditional Win Probability
Two players play a coin-flipping game with a single fair coin. The coin is flipped once per round. Every heads counts for Player 1, and every tails co...
Solve grid shortest-path and tree DP
This question pair evaluates proficiency in fundamental algorithmic techniques: finding shortest paths in a grid via breadth-first search and applying...
Compute Fibonacci Numbers
Write a function that returns the nth Fibonacci number. Definitions and requirements: - Use zero-based indexing: fib(0) = 0, fib(1) = 1. - For n >= 2,...
Calculate Ultimate Loss by Policy Term
You work with insurance policy-term loss data. For a given policy term, its ultimate loss is defined as the sum of losses from the current term and al...
Minimize Operations to Balance Shipments
A shop has n item types, where quantity[i] is the positive integer quantity of the i-th item type. The item types must be shipped in two non-empty con...
Maximize 1D deliveries within distance and minimize total distance
This question evaluates combinatorial optimization and constrained matching skills, focusing on reasoning about distance-based pairings, lexicographic...
Evaluate Alternative Data for an Investment Pitch
You are given an alternative dataset and asked to develop an investment pitch. Describe how you would determine whether the data contains a real, usab...
Evaluate and safely deploy a CVR model online
You have built a new CVR (conversion rate) prediction model for an RTB bidding system at a DSP. Offline metrics improved (e.g., lower log loss and hig...
Compare JavaScript == and === operators
In JavaScript, what is the difference between the == and === operators? Explain: 1. How each operator compares two values. 2. What type coercion is an...
Implement Cache and Count Components
You are asked to solve two independent coding problems in this session, each followed by a short discussion. This mirrors a 60-minute Amazon SDE codin...
Implement scaled dot-product attention
Task In this interview you are asked to hand-write the forward pass of attention from the mathematical formula (no need to run code). Implement single...
Maximum-Product Simple Path in a Complete Directed Graph
You are given a complete directed graph with n nodes labeled 0 through n - 1. For every ordered pair of distinct nodes (i, j), there is a directed edg...
Design a web search engine pipeline
Design the high-level pipeline of a web search engine. Assume you need to support internet-scale search (billions of web pages) with low-latency queri...
Answer NatWest behavioral prompts
At a NatWest online interview for an internship program, candidates were asked several behavioral questions. Prepare structured answers to the followi...
Explain Vector, Linked List, and Polymorphism
In a C++ interview, explain the differences between a dynamic array container such as std::vector and a linked-list-based container such as std::list....
Manipulate time-series with Pandas groupby
Given a DataFrame events(user_id, event_type, ts_utc, revenue): 1) Parse ts_utc as timezone-aware, convert to America/Los_Angeles, and handle DST tran...
Implement task queue with insert, delete, execute
Problem: Task manager with insert/delete/execute-next Design a data structure to manage executable tasks. Each task has: - taskId (unique) - priority ...
Explain approach and seek feedback effectively
Technical Screen: Communication in Live Coding and Internship Planning Part 1 — Live Coding Communication During a 20-minute live coding exercise foll...
Generate Uniform Samples and Estimate Percentiles
Solve two Google statistics questions: sample uniformly from a square using rand01 and estimate percentiles from histogram buckets using cumulative co...
Find two numbers that sum to target
Problem You are given an integer array nums (length n) and an integer target. Return the indices (i, j) such that: - i != j - nums[i] + nums[j] == tar...