Tinkercad is commonly used for:

1. simulating robotic movements.
2. data encryption.
3. performing gear ratio calculations only.
4. building operating systems.

In the block diagram of a robotic control system, the correct sequence is:

1. Input → Robot → Controller → Feedback
2. Feedback → Input → Controller → Robot
3. Input → Controller → Robot → Feedback
4. Controller → Input → Robot → Feedback

From the following, which function of Python checks whether all characters in a string 's' are alpha numeric?

1. s.allnum()
2. s.isnumal()
3. s.isalnum()
4. s.isalphanum()

A motor drives a small gear with 10 teeth which is connected to a larger gear with 40 teeth. What is the gear ratio?

1. 4 : 1
2. 1 : 4
3. 1 : 2
4. 2 : 1