Data Structures & Algorithms Interview Questions

Review this list of 347 Data Structures & Algorithms interview questions and answers verified by hiring managers and candidates.

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Implement the power function without using pow method or or exponentiation operator.
a year ago
Implement the memcpy() function in C.
2 years ago4 answers
Given a string, return the number of palindromic substrings in it.
2 years ago
Make calculator string parser for just additions and multiplications
a year ago
Given a binary matrix with every row sorted, find the index of the row containing the most number of 1s.
2 years ago1 answer
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Implement a phrase search in a list of documents.
6 months ago1 answer
Given a binary tree, find the shortest path from the root to a leaf.
6 months ago
Implement a red-black tree.
3 years ago1 answer
Implement a function to justify a list of words within a given width.
2 years ago1 answer
Set Matrix Zeroes
a year ago3 answers
Flatten a Dictionary
3 years ago9 answers
Implement a JavaScript function for Promise.all(). Has video answer
3 years ago1 answer
Calculate the number of times a pattern appears in a string.
2 years ago3 answers
Find the first common ancestor of two nodes in a binary tree.
9 months ago1 answer
Given two strings and two allowed operations, swapping positions of letters and converting all occurrences of one character to another, can the first string be transformed into the second?
6 months ago
Build a Basic Regex Parser
2 years ago2 answers
Implement a function that processes a stream of interval data.
a year ago
Given a list of trades, iterate to return buy/sell pairs and overall profit.
5 years ago2 answers
Implement a hashmap without using any libraries.
2 years ago1 answer
Minimum Cost to Connect Sticks
2 months ago

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Data Structures & Algorithms Interview Questions

Implement the power function without using pow method or or exponentiation operator.

Implement the memcpy() function in C.

Given a string, return the number of palindromic substrings in it.

Make calculator string parser for just additions and multiplications

Given a binary matrix with every row sorted, find the index of the row containing the most number of 1s.

Implement a phrase search in a list of documents.

Given a binary tree, find the shortest path from the root to a leaf.

Implement a red-black tree.

Implement a function to justify a list of words within a given width.

Set Matrix Zeroes

Flatten a Dictionary

Implement a JavaScript function for Promise.all(). Has video answer

Calculate the number of times a pattern appears in a string.

Find the first common ancestor of two nodes in a binary tree.

Given two strings and two allowed operations, swapping positions of letters and converting all occurrences of one character to another, can the first string be transformed into the second?

Build a Basic Regex Parser

Implement a function that processes a stream of interval data.

Given a list of trades, iterate to return buy/sell pairs and overall profit.

Implement a hashmap without using any libraries.

Minimum Cost to Connect Sticks

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