Coding Interview Questions

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

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Given an array of strings, return groups of "buddy strings," where the strings have the same length and the distance between corresponding characters is the same.
8 months ago
Solve an array problem where you are given two arrays and need to construct a new array by multiplying values across positions.
10 months ago
Build a compelling customer support bot using LangGraph on top of the provided fake SQL data for a music company.
a year ago
Given a list of conversion items between symbols, write an algorithm to return the conversion ratio for each pair of symbols.
4 years ago3 answers
Implement an efficient sparse matrix times vector multiplication.
3 months ago
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Given a large n-ary tree where the root node can pass information to one child per iteration, and in subsequent iterations, nodes can pass information to one child while the root continues with others, find the minimum number of iterations to reach all nodes.
4 years ago1 answer
Given the root of a binary tree, return the vertical order traversal of its node values from top to bottom, column by column. Nodes in the same row and column should be ordered left to right.
7 months ago
Determine the minimum number of parentheses needed to balance a given string.
3 years ago
Rank Salary by Department
5 answers
Find the smallest missing element from a sorted array.
5 years ago1 answer
Given two empty jugs with capacities a and b liters and an infinite water supply, determine a way to end up with exactly X liters of water.
2 years ago1 answer
Biased Coin Flip Histogram
3 answers
Implement a leaderboard that maintains the best score player at the top and gets any player in O(1) time.
2 years ago
Print the maximum positive sequence in a given array.
5 years ago5 answers
Find the length of the shortest word ladder.
2 years ago
Given an array of n integers and a number k, find the maximum number of elements whose sum is less than k, and return their sum.
2 years ago1 answer
Given a string where you can make certain edits, determine whether it can become a palindrome.
6 months ago
Determine if a number is a power of two.
2 years ago2 answers
Array Manipulation: Given an array, implement functions to perform add, remove, update operations and return the resulting array.
2 years ago
Find a local minima in an array Last Updated
a year ago1 answer

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Coding Interview Questions

Given an array of strings, return groups of "buddy strings," where the strings have the same length and the distance between corresponding characters is the same.

Solve an array problem where you are given two arrays and need to construct a new array by multiplying values across positions.

Build a compelling customer support bot using LangGraph on top of the provided fake SQL data for a music company.

Given a list of conversion items between symbols, write an algorithm to return the conversion ratio for each pair of symbols.

Implement an efficient sparse matrix times vector multiplication.

Given a large n-ary tree where the root node can pass information to one child per iteration, and in subsequent iterations, nodes can pass information to one child while the root continues with others, find the minimum number of iterations to reach all nodes.

Given the root of a binary tree, return the vertical order traversal of its node values from top to bottom, column by column. Nodes in the same row and column should be ordered left to right.

Determine the minimum number of parentheses needed to balance a given string.

Rank Salary by Department

Find the smallest missing element from a sorted array.

Given two empty jugs with capacities a and b liters and an infinite water supply, determine a way to end up with exactly X liters of water.

Biased Coin Flip Histogram

Implement a leaderboard that maintains the best score player at the top and gets any player in O(1) time.

Print the maximum positive sequence in a given array.

Find the length of the shortest word ladder.

Given an array of n integers and a number k, find the maximum number of elements whose sum is less than k, and return their sum.

Given a string where you can make certain edits, determine whether it can become a palindrome.

Determine if a number is a power of two.

Array Manipulation: Given an array, implement functions to perform add, remove, update operations and return the resulting array.

Find a local minima in an array Last Updated

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