Need of power full core for building secure algorithms

Qus. 1 : Major Component of loT is/are

1. Sensors
2. Actuators
3. Smart Applications
4. All of the Above

Qus. 2 : Which of the following is used to upload the Arduino Sketches to the board

1. avrgcc
2. g++
3. cpython
4. avrdude

Qus. 3 : What indicates to the reader the purpose of a letter?

1. Subject
2. Body
3. Address
4. Salutation

Programs