Coding Interview Questions

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

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How would you remove duplicates in a string? Has video answer
a month ago30 answers
How would you write a KNN search using base python?
2 years ago
Design and implement a ranked cache system.
2 years ago4 answers
Given an array of numbers where every number occurs twice except one, how would you find the unique number in O(log n) time?
7 months ago24 answers
Find the container with the maximum volume of water. Has video answer
2 years ago3 answers
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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
Find the longest substring without repeating characters. Has video answer
+9a month ago49 answers
Build a web crawler with multi-threading. Has video answer
4 months ago
Design a file upload feature for an AI chat application.
4 months ago1 answer
Monthly Post Success Analysis.
5 months ago39 answers
E-commerce (5 of 5)
3 years ago44 answers
Infection spread simulation.
3 months ago2 answers
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 ago24 answers
Given an array of strings, return the words that can be typed using letters of the alphabet on only one row of American keyboard.
a month ago
Design and implement an in-memory key-value store that supports set, transactional begin, commit, and abort operations. Has video answer
3 months ago1 answer
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.
10 months ago
Longest Valid Parentheses
2 years ago1 answer
Difference of Arrays
3 years ago72 answers
Find the first missing positive number in an array.
2 years ago15 answers
Instagram Likes
a year ago49 answers

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Coding Interview Questions

How would you remove duplicates in a string? Has video answer

How would you write a KNN search using base python?

Design and implement a ranked cache system.

Given an array of numbers where every number occurs twice except one, how would you find the unique number in O(log n) time?

Find the container with the maximum volume of water. Has video answer

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.

Find the longest substring without repeating characters. Has video answer

Build a web crawler with multi-threading. Has video answer

Design a file upload feature for an AI chat application.

Monthly Post Success Analysis.

E-commerce (5 of 5)

Infection spread simulation.

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

Given an array of strings, return the words that can be typed using letters of the alphabet on only one row of American keyboard.

Design and implement an in-memory key-value store that supports set, transactional begin, commit, and abort operations. Has video answer

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.

Longest Valid Parentheses

Difference of Arrays

Find the first missing positive number in an array.

Instagram Likes

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