Mobile Network Architecture Questions and Answers

Answer: A

The limitations of mobile computing are power consumption, the human interface with the device (small screens and keypads), range and bandwidth, and transmission interferences, which are ii, iii, iv and v. Device mobility and wireless connectivity are what makes mobile computing possible, so they are features and not limitations. The other options include one of those two or leave out limitations. Small screens, short battery life, limited bandwidth and interference are the reasons these items count as limitations of mobile devices.

Answer: A

GSM is an example of TDMA cellular systems.

GSM divides each 200 kHz carrier into eight time slots, and each user transmits in its own slot, which is time division multiple access. It also uses FDMA to separate carriers, but its defining multiple access scheme is TDMA.

CDMA (code division) is used by IS-95 and cdma2000 networks, and FDMA alone was the scheme of first-generation analog systems such as AMPS.