TECHQUEST 2.0

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Across
  1. 4. A numerical system with a base of 16, often used in computer system.
  2. 5. A technique used to gain unauthorized access to a computer system.
Down
  1. 1. The process of removing errors and bugs from a software program.
  2. 2. A popular operating system that is based on Unix.
  3. 3. This is a Standard Backtracking problem. Given a partially filled 9x9 2D array the goal is to assign digits (from 1 to 9) to the empty cells