Backtracking Algorithm Interview Questions

Last Updated : 16 Feb, 2026

Backtracking is a powerful algorithmic technique used to solve problems by exploring all possible solutions in a systematic and recursive manner. It is particularly useful for problems that require searching through a vast solution space, such as combinatorial problems, constraint satisfaction problems, and optimization tasks.

Easy Problems

  1. Rat in a Maze
  2. Print all permutations
  3. Palindromic Partitions
  4. All possible paths in a matrix
  5. Subset sum
  6. Tug of war

Medium Problems

  1. N Queens Problem
  2. Word Break Problem
  3. Path to middle cell in a maze
  4. Hamiltonian cycle
  5. Sudoku
  6. M Coloring Problem
  7. Cryptarithmetic puzzle
  8. Path of more than k length
  9. Partition into k subsets

Hard Problems

  1. Warnsdorff's Algorithm
  2. Remove Invalid Parenthesis
  3. Match a pattern and string using regular expression
  4. longest possible route in a matrix with hurdles
  5. Shortest safe route in a path with landmines
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