Coding Interview Questions

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

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Merge k sorted linked lists. Has video answer
+92 months ago15 answers
Given the root of a binary tree of integers, return the maximum path sum. Has video answer
+23 months ago2 answers
Fibonacci Numbers
+29 months ago20 answers
Given 3D trajectory data, manipulate/tokenize it into a usable format so you can predict the next step from the current trajectory.
8 months ago
Determine if two sentences are similar.
4 years ago22 answers
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Sort a K-Messed Array
2 years ago25 answers
Rotating the Box
2 years ago
How do you split a machine learning dataset for training, evaluation, and testing? Has video answer
+12 years ago3 answers
Sales Report
2 years ago11 answers
Given a list of strings, find all strings that encode to the same value using a Caesar Cipher. (A Caesar Cipher rotates characters, e.g. in CC3: a->d, b->e, ..., z->c)
10 months ago1 answer
Sort a nearly sorted (or K sorted) array.
a year ago1 answer
Implement a circular buffer.
2 years ago4 answers
Find Monthly Revenue Growth
2 years ago12 answers
Given a list of words, find the number of prefix pairs, i.e. pairs i, j where words[i] == words[j] or words[i].startswith(words[j]) or words[j].startswith(words[i]).
2 years ago1 answer
Solve an interval scheduling problem by finding “free time” intervals to accept queries.
8 months ago1 answer
Survey Sampling
3 years ago16 answers
Extract and clean a usable dataset from a provided company demo database using only SQL and Python.
10 months ago
Given an array of task durations (in minutes), return the pairs of tasks that can be completed within 60 minutes. For example, for [1, 43, 20, 59, 30, 30], return [[0, 3], [4, 5]].
3 months ago2 answers
Given an array of integers, find the next greater integer for each element in the array.
a year ago
Implement the Unix tail command.
6 months ago

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Coding Interview Questions

Merge k sorted linked lists. Has video answer

Given the root of a binary tree of integers, return the maximum path sum. Has video answer

Fibonacci Numbers

Given 3D trajectory data, manipulate/tokenize it into a usable format so you can predict the next step from the current trajectory.

Determine if two sentences are similar.

Sort a K-Messed Array

Rotating the Box

How do you split a machine learning dataset for training, evaluation, and testing? Has video answer

Sales Report

Given a list of strings, find all strings that encode to the same value using a Caesar Cipher. (A Caesar Cipher rotates characters, e.g. in CC3: a->d, b->e, ..., z->c)

Sort a nearly sorted (or K sorted) array.

Implement a circular buffer.

Find Monthly Revenue Growth

Given a list of words, find the number of prefix pairs, i.e. pairs i, j where words[i] == words[j] or words[i].startswith(words[j]) or words[j].startswith(words[i]).

Solve an interval scheduling problem by finding “free time” intervals to accept queries.

Survey Sampling

Extract and clean a usable dataset from a provided company demo database using only SQL and Python.

Given an array of task durations (in minutes), return the pairs of tasks that can be completed within 60 minutes. For example, for [1, 43, 20, 59, 30, 30], return [[0, 3], [4, 5]].

Given an array of integers, find the next greater integer for each element in the array.

Implement the Unix tail command.

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