Coding Interview Questions

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

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Given arrays of varying lengths, how would you pad them efficiently?
9 months ago
Can Jump - Given an array of non-negative integers, you're initially at the first index. Each element represents your maximum jump length at that position. Determine if you can reach the last index.
2 years ago
Given an array representing the height of buildings from a sea beach, return an array of heights of the buildings that have a sea view.
5 years ago1 answer
Efficiently find the next greatest element in an array.
3 years ago
Given a string S, determine if it can be converted into a palindrome by making at most one swap of two characters.
2 years ago
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Improving Students
3 answers
Implement serialize(root) + deserialize(data) so the same tree comes back
4 months ago
Sliding Window Maximum
2 years ago
What are the different types of software testing?
2 years ago1 answer
Find the element at a given position in a sorted version of an unsorted array. Example: Input: {5,1,7,19,0,16}, k=3 Output: 5 (Explanation: Sorted array is {0,1,5,7,16,19}, and the 3rd positioned element is 5.)
5 years ago3 answers
Implement a card game with classes like car/card and player, including functionality like shuffling and assigning cards to players.
8 months ago
Define the scope and requirements for a snake_case to camelCase converter function.
6 months ago
Find the dot product of two sparse vectors.
3 years ago
Invert binary tree.
2 years ago
Given a string that doesn't fit into a machine's memory, split it at each space and count the number of spaces.
3 years ago1 answer
Determine if two words are sorted in lexicographic order.
3 years ago
Write a PowerShell script to detect C2 beaconing.
10 months ago
Sort an array containing only 0s, 1s, and 2s.
5 years ago3 answers
How would you rebuild one of your projects in a lower-level language to make it faster?
a year ago
Explain tic tac toe end games.
4 years ago

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Coding Interview Questions

Given arrays of varying lengths, how would you pad them efficiently?

Can Jump - Given an array of non-negative integers, you're initially at the first index. Each element represents your maximum jump length at that position. Determine if you can reach the last index.

Given an array representing the height of buildings from a sea beach, return an array of heights of the buildings that have a sea view.

Efficiently find the next greatest element in an array.

Given a string S, determine if it can be converted into a palindrome by making at most one swap of two characters.

Improving Students

Implement serialize(root) + deserialize(data) so the same tree comes back

Sliding Window Maximum

What are the different types of software testing?

Find the element at a given position in a sorted version of an unsorted array. Example: Input: {5,1,7,19,0,16}, k=3 Output: 5 (Explanation: Sorted array is {0,1,5,7,16,19}, and the 3rd positioned element is 5.)

Implement a card game with classes like car/card and player, including functionality like shuffling and assigning cards to players.

Define the scope and requirements for a snake_case to camelCase converter function.

Find the dot product of two sparse vectors.

Invert binary tree.

Given a string that doesn't fit into a machine's memory, split it at each space and count the number of spaces.

Determine if two words are sorted in lexicographic order.

Write a PowerShell script to detect C2 beaconing.

Sort an array containing only 0s, 1s, and 2s.

How would you rebuild one of your projects in a lower-level language to make it faster?

Explain tic tac toe end games.

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