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."
Count Special Index Pairs
Given an integer array nums of length n, count the number of index pairs (i, j) such that: - 0 <= i < j < n - nums[i] * nums[j] is even - j - i is odd...
Tell me about leadership challenges
Prepare for common Product Manager internship behavioral questions. Build a set of concise, reusable stories that show ownership, communication, prior...
Streaming Equivalence of Two Trade Feeds with Per-Company Ordering
A market-data system receives trade events from two independent feeds. Each event is a pair (company, trade_id) identifying one trade for one company....
Implement Cache and Rotate Matrix
Solve the following two independent coding tasks. Task 1: Implement an LRU Cache Design a data structure LRUCache that stores integer keys and integer...
Validate Bracket Sequence
This question evaluates proficiency with stack data structures, string parsing and matching logic, and the ability to reason about algorithmic time an...
Reverse Words While Preserving Spaces
Implement a C++ function that reverses the order of words in a string. Assume a word is any maximal sequence of non-space characters, and the input co...
Handle multicollinearity in feature selection
You are building an interpretable predictive model for an insurance company, such as a linear or logistic regression model for claim risk. Several inp...
Count Same-Day Registered Posters
You are given two tables: `text users - user_id: unique identifier for a user - registered_at: timestamp when the user registered posts - post_id: uni...
Analyze Product Launch and Creator Engagement
You are interviewing for a Data Scientist intern role at a short-video platform. Use a recent data or machine-learning project from your resume as the...
Analyze sales with groupby
You are given three pandas DataFrames representing a food delivery marketplace: - orders(order_id, product_id, quantity, unit_price, status) - product...
Simulate sticky load balancer with shutdown
Problem Implement a simulator for a load balancer that routes long-lived WebSocket connections across m backend servers. You receive a sequence of tex...
Analyze the Accident-Rate Spike
A monthly line chart shows the accident rate for Uber trips in one city. The accident rate increases sharply from June through November, then drops qu...
Simulate 2048 and pack board into uint64
Problem: 2048 move simulation + board compression You are implementing part of the 2048 game on a fixed 4×4 grid. Part A — Simulate a move Given a 4×4...
Find pairs with the minimum absolute difference
Given an integer array (not necessarily sorted), find the minimum absolute difference between any two distinct elements. Return all pairs of values th...
Construct connected crop layout and safe paths
This question evaluates constructive grid design and graph-based pathfinding skills, specifically the ability to produce connected labeled regions tha...
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...
Implement and Tune KNN Classifier
You are given two CSV files for a three-class leaf-classification task. - train.csv contains three numeric feature columns: feature_0, feature_1, and ...
Reconstruct a binary tree from traversals
This question evaluates understanding of binary tree traversal properties, data structure manipulation, and algorithmic complexity involved in reconst...
Maximize sum without choosing adjacent elements
This question evaluates a candidate's understanding of array-based optimization and dynamic programming concepts for computing a maximum sum under non...
Match people to questions using tags and priorities
This question evaluates competencies in bipartite matching and combinatorial optimization, along with practical data-structure design for scalable tag...