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 perform a lookup in SQL?
5 years ago1 answer
Implement a SQL parser that converts raw SQL strings into programming objects or ORM primitives.
10 months ago
Implement a doubly linked list.
6 months ago1 answer
Implement wildcard pattern matching for a string (s) and a pattern (p) with '?' and '*' in a way that covers the entire input string.
4 years ago3 answers
Given a fully or partially attempted 9x9 Sudoku board, determine if it is a valid solution.
6 months ago
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What's a memory leak and how can we avoid it?
2 years ago1 answer
Given a biased coin function, write another function to make it return heads or tails with equal probability.
3 years ago
Total Outfit Combinations
2 years ago4 answers
Implement merge-sort
2 years ago1 answer
Explain the solution for Leetcode problem 1010: Pairs of Songs With Total Durations Divisible by 60.
a month ago
How would you code an app that displays the weekly lunch menu?
2 years ago
What is the time complexity for Quick Sort and Merge Sort algorithms?
1 answer
Find the k-th smallest and k-th largest element in a binary search tree (BST).
2 years ago1 answer
Implement a function to find the minimum number of dice rolls needed to reach the end in a Snakes and Ladders game.
a year ago
Print all combinations of numbers from 1 to n that sum to n.
+22 years ago2 answers
Given an array, print the Next Greater Element (NGE) for each element. The NGE for an element x is the first greater element on the right side of x in the array, or -1 if none exists.
4 years ago3 answers
Snapshot Array
4 months ago
Find the maximum subarray product
a year ago2 answers
Traverse a matrix or grid to find the shortest path between point A and point B.
9 months ago
Explain the map function.
3 years ago2 answers

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Coding Interview Questions

How would you perform a lookup in SQL?

Implement a SQL parser that converts raw SQL strings into programming objects or ORM primitives.

Implement a doubly linked list.

Implement wildcard pattern matching for a string (s) and a pattern (p) with '?' and '*' in a way that covers the entire input string.

Given a fully or partially attempted 9x9 Sudoku board, determine if it is a valid solution.

What's a memory leak and how can we avoid it?

Given a biased coin function, write another function to make it return heads or tails with equal probability.

Total Outfit Combinations

Implement merge-sort

Explain the solution for Leetcode problem 1010: Pairs of Songs With Total Durations Divisible by 60.

How would you code an app that displays the weekly lunch menu?

What is the time complexity for Quick Sort and Merge Sort algorithms?

Find the k-th smallest and k-th largest element in a binary search tree (BST).

Implement a function to find the minimum number of dice rolls needed to reach the end in a Snakes and Ladders game.

Print all combinations of numbers from 1 to n that sum to n.

Given an array, print the Next Greater Element (NGE) for each element. The NGE for an element x is the first greater element on the right side of x in the array, or -1 if none exists.

Snapshot Array

Find the maximum subarray product

Traverse a matrix or grid to find the shortest path between point A and point B.

Explain the map function.

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