Q.1. What is SIM? (1 Mark)
Ans: SIM (Subscriber Identification Module) are inter-changeable modules which store subscriber and wireless provider information.
Q.2. Expand: (1 Mark)
Ans: (a) GPRS: General Packet Radio Service
(b) FDMA: Frequency Division Multiple Access
Q.3. What is GSM? (1 Mark)
Ans: GSM (Global System for Mobile communications) is a technique that uses TDMA which allows 8 simultaneous calls on the same radio frequency.
Q.4. Give the difference between 3G and 4G. (1 Mark)
Q.5. Write one characteristic each for 2G and 3G Mobile Technologies. (1 Marks)
Ans: 2G: First digital cellular system with data speeds upto 64 kbps.
3G: With speeds upto 2 Mbps, it allows voice and video calls.
Q.6. Differentiate SMS and MMS. (1 Mark)