Design File Storage SystemDesign the file storage system with: This is a scoped storage-system design: define core entities (Company/User/File/Category), permissions at company scope, and APIs for upload/update/download/search. Interviewers expect discussion on metadata indexing for search, storage layout (object store), versioning for updates, and access checks on every operation. Optional: audit logs, quotas, and multi-tenant isolation.

Valid Parentheses CheckerGiven a string s containing only ‘(‘ , ‘)’ , ‘{‘ , ‘}’ , ‘[‘ , ‘]’, return True if valid: opens must be closed by same type and in correct order. Test Cases Classic stack validation: push opening brackets, on closing bracket check top matches type, otherwise invalid; finally stack must be…

Modify your implementation to support different types of restrictions.Possible restrictions are: This is about extensible design: model restrictions as composable policies (not a single enum), support multiple restrictions per tag, and define evaluation order (e.g., log then block or block then log). Interviewers look for clean abstractions, easy future extension (new restriction types), and clear…

This problem tests arbitrary-base conversion where the number is stored as a linked list. The core idea is to extract the base-10 value, then repeatedly apply modulo and division to build the new-base list. It evaluates understanding of linked-list big-integer representation and digit extraction logic. The VOprep team has long accompanied candidates through various major company OAs…

Problem 1 — CICD Pipeline Dependency Ordering CICD Pipeline:- Different environments.- If nothing is in prod theDatamine the order in which we should deploy our resources. Questions:1. What are the inputs? [A,B] where A and B are resources. A depends on B – list of lists where each inner list is a dependency pair and…

This Microsoft interview problem focuses on weighted random selection. Given cities and their populations, the function should return a city name with probability proportional to its population. A common solution uses a prefix-sum array and binary search to map a random number to the correct weighted interval. The VOprep team has long accompanied candidates through various major…

There are 2 single linked list, one is ascending sorted, the other is descending sorted, write code to merge them together, result in ascending sorted. For example:L1: 1->2->3L2: 6->5->4 Result:1->2->3->4->5->6 Requirements:Time complexity: O(M + N), M is the length of L1, and N is the length of L2Space complexity: O(1) Please write code to solve…

Problem 1 Imagine you’re working on a language which only support Stack, but you need a Queue functionality to fulfill the requirement. Problem 2 Given:const a = 1;const b = ‘1’;What is the result of each of the following statements: a == ba === b!a === !ba + ba + +b These are typical Microsoft…

Recently, Microsoft interview activity has noticeably increased again. One thing that has always been true about Microsoft is that interview content heavily depends on the team — different teams test very different skills. This time, all three of my rounds followed the pattern of resume deep-dive + coding questions, with no system design and no…

Problem statement（题目原文）Given: What is the result of each of the following statements? Brief idea Know == performs coercion (string → number), === doesn’t; + concatenates when a string is involved; unary + coerces to number. The VOprep team has long accompanied candidates through various major company OAs and VOs, including Microsoft Google, Amazon, Citadel, SIG, providing real-time…