Software Engineer Coding Interview Questions

Review this list of 323 Coding Software Engineer interview questions and answers verified by hiring managers and candidates.

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Find the lowest common ancestor (LCA) of two nodes in a binary tree.
+35 months ago10 answers
01 Matrix
2 years ago1 answer
Find the longest palindromic subsequence using dynamic programming.
+37 months ago13 answers
Explain the sort function.
3 years ago3 answers
Find the shortest subsequence of a cyclic string S that contains all characters of a pattern k.
2 years ago1 answer
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Coin Change
+27 months ago13 answers
Find the shortest path in a graph.
4 months ago3 answers
What are virtual functions?
2 years ago2 answers
Explain callback functions.
2 years ago1 answer
Determine a ship's capacity to ship packages in D days.
3 years ago
Given an integer n, return the number of steps to reach 1 following these rules: if n is even, divide by 2; if odd, multiply by 3 and add 1.
2 years ago1 answer
Implement a method to convert an integer to a string of bytes without using built-in helper functions.
6 months ago
Given a Directed Acyclic Graph (DAG), write a function to return the length of the longest path.
2 months ago
Given a number of courses and a list of prerequisite pairs, return true or false depending on whether it is possible to finish all courses.
8 months ago
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
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
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
Design a JSON parser.
9 months ago

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Software Engineer Coding Interview Questions

Find the lowest common ancestor (LCA) of two nodes in a binary tree.

01 Matrix

Find the longest palindromic subsequence using dynamic programming.

Explain the sort function.

Find the shortest subsequence of a cyclic string S that contains all characters of a pattern k.

Coin Change

Find the shortest path in a graph.

What are virtual functions?

Explain callback functions.

Determine a ship's capacity to ship packages in D days.

Given an integer n, return the number of steps to reach 1 following these rules: if n is even, divide by 2; if odd, multiply by 3 and add 1.

Implement a method to convert an integer to a string of bytes without using built-in helper functions.

Given a Directed Acyclic Graph (DAG), write a function to return the length of the longest path.

Given a number of courses and a list of prerequisite pairs, return true or false depending on whether it is possible to finish all courses.

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.

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

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.

Design a JSON parser.

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