Which statement describes the use of a block-based visual programming tool in IoT prototyping?

• A. Writing device drivers in C
• B. Configuring network routers
• C. Drag-and-drop programming by connecting blocks
• D. Compiling Java applets

Answer: (C)

Block-based visual programming tools let you build IoT prototypes by dragging blocks that represent devices, data, and actions onto a canvas and wiring them together. This approach focuses on how data flows and how events trigger responses, without writing traditional code. In IoT prototyping, you can quickly assemble a sensor reading that feeds a condition and then triggers an actuator simply by connecting blocks. That’s why describing it as drag-and-drop programming by connecting blocks best captures how these tools are used. (Tools like Node-RED or Blockly for IoT illustrate this approach, making rapid experimentation and collaboration easy.)