Button input conflicts occur when multiple button presses create ambiguous or erroneous signals in electronic systems. The most common prevention methods include hardware debouncing using RC filters or Schmitt triggers to eliminate contact bounce. Software debouncing implements time delays or state machines in code to validate stable inputs. Button matrix scanning organizes buttons in rows and columns to efficiently detect multiple presses while minimizing pins. Interrupt handling prioritizes critical button inputs for immediate response. Additional approaches incorporate diode isolation to prevent ghosting in matrices, polling routines for systematic input checking, and implementing key rollover features that either lock out subsequent presses or register them sequentially. These techniques ensure reliable user input across various applications from consumer electronics to industrial control systems, with selection depending on factors like cost, complexity, and required response time. Proper implementation typically combines multiple methods for robust conflict prevention in both simple and complex button interfaces.