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Coding Interview Questions

Review this list of 515 Coding interview questions and answers verified by hiring managers and candidates.

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Given a factory represented as a 2D grid with some cells blocked and some containing robots, determine if the robots can collectively reach all unblocked cells.
a year ago2 answers
Implement a simple text editor supporting insert, delete, and cursor movement.
7 months ago
Given a head node of a linked list, delete k-th node from the end of the list.
a year ago5 answers
Find a triplet in an array with a given sum. Has video answer
+32 years ago31 answers
Implement a k-nearest neighbors algorithm. Has video answer
3 months ago14 answers
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Detect bad words in a string.
4 months ago
Lowest Earning Employees
26 answers
Marketing Channel Attribution
a year ago15 answers
Find the median of two sorted arrays. Has video answer
+68 months ago1 answer
Maximum Profit
4 months ago34 answers
Linked List Cycle
+4a year ago23 answers
Given a hierarchical file system with inherited and overridden permissions, write a function to determine whether a user has access to a file at a specific time.
5 months ago
Session Data Analysis.
a year ago6 answers
Project Budgets
8 months ago28 answers
Sort a list of natural numbers and their squares in the most efficient way possible.
3 years ago4 answers
Given positions of N kids and M ice cream sellers on a 1D line, find the smallest distance E such that every kid lies within the range [P - E, P + E] of at least one seller.
a year ago4 answers
Implement encode and decode for a list of strings.
3 months ago1 answer
Write a query to find all dates where the stadium had three or more consecutive days with attendance of 100 or more people.
a year ago2 answers
Explain the differences between an interface and an abstract class.
+12 years ago3 answers
Design and implement a system to manage a voice-dubbing workflow, replacing an Excel-based process. Given operations for editing, reviewing, and approving voice lines, correctly track status changes, re-reviews, and collaboration state.
10 months ago

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