Coding Interview Questions

Review this list of 493 Coding interview questions and answers verified by hiring managers and candidates.

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Binary Tree Zigzag Level Order Traversal
2 months ago
Design a banking system to facilitate account creation, deposits, transfers, and listing the most active accounts by total monetary activity, with commands entered via parsing CSV/JSON.
a year ago5 answers
Design a file upload feature for an AI chat application.
3 months ago1 answer
Infection spread simulation.
2 months ago1 answer
Find the longest substring without repeating characters.
+7a month ago42 answers
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Build a web crawler with multi-threading.
3 months ago
E-commerce (5 of 5)
3 years ago44 answers
Monthly Post Success Analysis.
4 months ago38 answers
Given a list of bounding boxes and annotations, write a function to compute Intersection over Union.
a month ago
Given an integer array nums and an integer k, return true if nums has a subarray of at least two elements whose sum is a multiple of k. Has video answer
+62 years ago18 answers
Implement a streaming database with the given constraints and requirements.
a year ago
Code an image-processing pipeline that reads per-image instruction files and applies ordered transformations (e.g., rotate, invert, crop, convert) to large sets of images of varying sizes across multiple folders.
9 months ago
Find the first missing positive number in an array.
2 years ago15 answers
Maximum Number of Visible Points
a year ago1 answer
Difference of Arrays
3 years ago68 answers
Instagram Likes
a year ago48 answers
Find the sum of all elements in a binary tree that fall within the range [low, high], where 'low' and 'high' are integers.
2 years ago11 answers
Top Earning Employees
a year ago71 answers
Given n houses in a line with money in each, find the maximum amount a robber can steal, without stealing from two adjacent houses.
+4a month ago5 answers
Find the minimum characters to insert to make a string a palindrome.
8 months ago2 answers

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Coding Interview Questions

Binary Tree Zigzag Level Order Traversal

Design a banking system to facilitate account creation, deposits, transfers, and listing the most active accounts by total monetary activity, with commands entered via parsing CSV/JSON.

Design a file upload feature for an AI chat application.

Infection spread simulation.

Find the longest substring without repeating characters.

Build a web crawler with multi-threading.

E-commerce (5 of 5)

Monthly Post Success Analysis.

Given a list of bounding boxes and annotations, write a function to compute Intersection over Union.

Given an integer array nums and an integer k, return true if nums has a subarray of at least two elements whose sum is a multiple of k. Has video answer

Implement a streaming database with the given constraints and requirements.

Code an image-processing pipeline that reads per-image instruction files and applies ordered transformations (e.g., rotate, invert, crop, convert) to large sets of images of varying sizes across multiple folders.

Find the first missing positive number in an array.

Maximum Number of Visible Points

Difference of Arrays

Instagram Likes

Find the sum of all elements in a binary tree that fall within the range [low, high], where 'low' and 'high' are integers.

Top Earning Employees

Given n houses in a line with money in each, find the maximum amount a robber can steal, without stealing from two adjacent houses.

Find the minimum characters to insert to make a string a palindrome.

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