Data Structures & Algorithms Interview Questions

Review this list of 336 Data Structures & Algorithms interview questions and answers verified by hiring managers and candidates.

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Maximum Number of Visible Points
+114 days ago1 answer
Find the sum of all elements in a binary tree that fall within the range [low, high], where 'low' and 'high' are integers.
2 years ago11 answers
Given n houses in a line with money in each, find the maximum amount a robber can steal, without stealing from two adjacent houses.
+4a month ago6 answers
Given a list of bounding boxes and annotations, write a function to compute Intersection over Union.
a month ago
Find the minimum characters to insert to make a string a palindrome.
9 months ago2 answers
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Reverse a Sentence
+32 years ago39 answers
Group anagrams
+12a month ago2 answers
Merge Intervals Has video answer
+13a month ago63 answers
Binary Tree Zigzag Level Order Traversal
2 months ago
Find the longest common prefix given two integer arrays.
10 months ago2 answers
Given a matrix with a rat, bread, cat, and obstacles, find a path from the rat to the bread that maximizes the minimum distance from cat.
7 months ago3 answers
Reorder linked list.
10 months ago
Burst Balloons
2 years ago
Explain how to find a target sum in an array. Has video answer
2 years ago12 answers
How would you store a list of numbers as a single number? Has video answer
5 years ago14 answers
Valid Parentheses
+133 months ago29 answers
Given a sorted array of integers (which may include negatives), return the squares of the numbers in sorted order. As a follow-up, find the k-th smallest squared value.
9 months ago6 answers
Implement a function to traverse cell dependencies in an Excel-like spreadsheet and detect circular references between cells.
9 months ago
Check if word exists in the string.
8 months ago
Move all zeros to the end of an array. Has video answer
+42 months ago82 answers

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Data Structures & Algorithms Interview Questions

Maximum Number of Visible Points

Find the sum of all elements in a binary tree that fall within the range [low, high], where 'low' and 'high' are integers.

Given n houses in a line with money in each, find the maximum amount a robber can steal, without stealing from two adjacent houses.

Given a list of bounding boxes and annotations, write a function to compute Intersection over Union.

Find the minimum characters to insert to make a string a palindrome.

Reverse a Sentence

Group anagrams

Merge Intervals Has video answer

Binary Tree Zigzag Level Order Traversal

Find the longest common prefix given two integer arrays.

Given a matrix with a rat, bread, cat, and obstacles, find a path from the rat to the bread that maximizes the minimum distance from cat.

Reorder linked list.

Burst Balloons

Explain how to find a target sum in an array. Has video answer

How would you store a list of numbers as a single number? Has video answer

Valid Parentheses

Given a sorted array of integers (which may include negatives), return the squares of the numbers in sorted order. As a follow-up, find the k-th smallest squared value.

Implement a function to traverse cell dependencies in an Excel-like spreadsheet and detect circular references between cells.

Check if word exists in the string.

Move all zeros to the end of an array. Has video answer

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