Internet of Things (IoT) Practice Exam

Which of the following could represent a line of programming code?

1. If temperature is more than 30 degrees C, run fan, else, run heater

2. When it gets too hot, turn the fan on otherwise keep heating the room

3. Run heater until temperature reaches 30 degrees C then cool it down

4. All of the above

The correct answer is: If temperature is more than 30 degrees C, run fan, else, run heater

The choice that accurately represents a line of programming code is the one that follows a structured syntax commonly found in programming languages. The first option, which uses clear conditional logic, illustrates a typical programming construct: it checks if a condition (temperature being more than 30 degrees Celsius) is met and executes one action (running the fan) if true, while executing an alternative action (running the heater) if false. This format closely resembles the syntax used in many programming languages and allows for straightforward implementation in code. In contrast, while the other choices convey similar intentions, they lack the precise structure and clarity expected in coding syntax. The second option presents an informal description of the logic without clear conditional statements or defined actions, resembling more of a natural language description than computer code. The third option, although it hints at a logical flow, does not express this in a clear, correct programming syntax that would be executable. Thus, the first option stands out as the most representative of a line of programming code due to its structured and formalized approach to conditional logic and actions.