Modem provides internet, WiFi, we can connect multiple devices to internet through modem.
Modem provides radiation of short wavelength and the transmitter in your mobile phones and computers convert those radiations into digital signals and vice-versa.
Answer:
A: Radio waves.
Explanation:
Computers use short-wave radio in order to communicate with devices in it's immediate vicinity.
Answer:
You can answer this very easily by considering which of the circumstances affect the end user and which affect the developer:
1) Didn't use comments in the code
- affects developers
2) User complaints about language used in the program
- affects users
3) The variables have meaningless names
- affects developers
4) The program should have used a loop
- affects developers
5) The numeric results are incorrect
- affects users
Your answers then are 2 and 5, spoken languages and incorrect output will very much affect the user experience.