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Interview questions by company and topic | SysRound

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4,878 questions

Showing 1,076–1,100

CodingDifficulty not specifiedLeetCode 1381
Design a Stack With Increment Operation
Implement a bounded stack (maxSize) supporting push, pop (returning -1 if empty), and increment(k, val) which adds val to the bottom k elements; the core…
Companies: Google
Last reported May 2025
Open workspace
CodingDifficulty not specifiedLeetCode 1279
Traffic Light Controlled Intersection
Given arrival times/orders of cars and a traffic light that cycles through states, simulate the intersection to determine which cars can pass (and when) under…
Companies: Google
Last reported May 2025
Open workspace
CodingDifficulty not specifiedLeetCode 262
Trips and Users
Compute, for each day between 2013-10-01 and 2013-10-03 that has at least one trip, the cancellation rate among trips where both client and driver are…

Page 44 of 196

Companies: Uber

Last reported May 2025

CodingDifficulty not specifiedLeetCode 2726

Calculator with Method Chaining

Implement a Calculator class whose constructor takes an initial numeric result and provides add, subtract, multiply, divide (throw "Division by zero is not allowed" for…

Companies: Google, Microsoft

Last reported May 2025

CodingDifficulty not specifiedLeetCode 730

Count Different Palindromic Subsequences

Count the number of distinct non-empty palindromic subsequences in a string (n ≤ 1000, alphabet {a,b,c,d}), returning the result modulo 1e9+7. The core challenge is…

Companies: Salesforce

Last reported May 2025

CodingDifficulty not specified

Netflix internal bank (usual DS&A no tricks)

Companies: Netflix

Last reported May 2025

CodingDifficulty not specified

Given a basic API for a low level disk drive, implement a file system that can read and write.

Companies: Jane Street

Last reported May 2025

CodingHardLeetCode 301

Remove Invalid Parentheses

Given a string containing letters and parentheses, remove the minimum number of parentheses to produce all distinct valid parentheses strings and return them. The core…

Companies: Meta

Backtracking · Breadth-First Search · String

Last reported May 2025

CodingDifficulty not specified

Topological sort, Graph BFS, how you handle difficult colleagues, design error handling system

Companies: Snap

Last reported May 2025

CodingDifficulty not specifiedLeetCode 958

Check Completeness of a Binary Tree

Determine whether a binary tree is complete — i.e., every level except possibly the last is fully filled and nodes in the last level are…

Companies: Meta

Last reported Apr 2025

CodingDifficulty not specifiedLeetCode 1233

Remove Sub-Folders from the Filesystem

Given a list of absolute folder paths, return only the top-level folders by removing any path that is a subfolder of another. The core challenge…

Companies: Google, Meta

Last reported Apr 2025

CodingDifficulty not specifiedLeetCode 2477

Minimum Fuel Cost to Report to the Capital

Given a tree rooted at city 0 with one representative per node and cars of fixed capacity, compute the minimum fuel (edge traversals) needed to…

Companies: Amazon

Last reported Apr 2025

CodingMediumLeetCode 93

Restore IP Addresses

Partition the digit string into exactly four segments (by inserting three dots) so each segment is between 0 and 255 and has no leading zeros…

Companies: Microsoft, Motive, NVIDIA

Backtracking · String

Last reported Apr 2025

CodingDifficulty not specifiedLeetCode 2625

Flatten Deeply Nested Array

Flatten a nested array up to a given depth n: return a new array where only subarrays whose nesting depth is less than n (top-level…

Companies: Apple, Meta

Last reported Apr 2025

CodingDifficulty not specifiedLeetCode 429

N-ary Tree Level Order Traversal

Return the node values of an n-ary tree grouped by depth (level-order / breadth-first traversal), producing a list of lists where each inner list contains…

Companies: Meta

Last reported Apr 2025

CodingHardLeetCode 4

Median of Two Sorted Arrays

Find the median of two sorted arrays in O(log(m+n)) time by using binary search to partition the arrays so the left half contains the correct…

Companies: Amazon, Bloomberg, eBay, Goldman Sachs +5

Array · Binary Search · Divide and Conquer

Last reported Apr 2025

CodingHard

Implement in-memory database insert and delete operations

Companies: OpenAI

Data Structure Design

Last reported Apr 2025

CodingDifficulty not specifiedLeetCode 203

Remove Linked List Elements

Companies: Quicknode

Last reported Apr 2025

CodingDifficulty not specifiedLeetCode 448

Find All Numbers Disappeared in an Array

Given an array nums of length n where each value is in [1,n], return all integers in [1,n] that are missing from nums. The core…

Companies: Amazon

Last reported Apr 2025

CodingDifficulty not specifiedLeetCode 336

Palindrome Pairs

Given an array of unique words, return all ordered index pairs (i, j) such that words[i] + words[j] is a palindrome. The optimal solution relies…

Companies: Airbnb

Last reported Mar 2025

CodingDifficulty not specifiedLeetCode 1796

Second Largest Digit in a String

Extract the distinct digits from an alphanumeric string and return the second-largest digit value (or -1 if fewer than two distinct digits exist). The string…

Companies: Spotify

Last reported Mar 2025

CodingDifficulty not specifiedLeetCode 274

H-Index

Find the largest integer h such that at least h papers have citation counts >= h — i.e., determine the threshold rank in the citations…

Companies: Microsoft

Last reported Mar 2025

CodingDifficulty not specifiedLeetCode 530

Minimum Absolute Difference in BST

Given the root of a BST, find the minimum absolute difference between values of any two different nodes. Use the BST property (in-order yields sorted…

Companies: Meta

Last reported Mar 2025

CodingMediumLeetCode 1541

Minimum Insertions to Balance a Parentheses String

Given a string of '(' and ')', return the minimum number of insertions needed to make it balanced under the rule that each '(' must…

Companies: Bloomberg, Meta

Bracket Sequences · Greedy · Stack · String

Last reported Mar 2025

CodingMediumLeetCode 230

Kth Smallest Element in a BST

Return the k-th smallest value (1-indexed) in a BST — exploit that an in-order traversal yields values in sorted order and pick the k-th visited…

Companies: Amazon, Google, Meta, Uber

Binary Search Tree · Binary Tree · Depth-First Search · Tree

Last reported Mar 2025