Mobile Computing -Introduction-Unit-1 Quiz

2G refers to a second-generation system based on ______ and was emerged in the late 1980s

• GSM

• FDMA

• CDMA

• TDMA

Which of the following is the data speed of 2.5G technology?

• 64 kbps

• 64-144 kbps

• 2 Gbps

• 4 Gbps

_______ converts narrow band signal into a broadband signal using a special code

• TDMA

• ALOHA

• Slotted ALOHA

• Spread Spectrum

_______ systems take a user bitstream and perform an (XOR) with a so-called chipping sequence

• SS

• DSSS

• FHSS

• TDMA

Which of the following is the main reason for the hidden terminal problem?

• Speed

• Distance

• Collision

• Delay

____ uses short signaling packets for collision avoidance

• MACA (Multiple Access with Collision Avoidance)

• CSMA (Carrier Sense Multiple Access)

• PRMA (Packet Reservation Multiple Access)

• DAMA (Demand Assigned Multiple Access)

________ is used for allocating a separated space to users in wireless networks.

• SDMA

• TDMA

• CDMA

• FDMA

In _______, the transmitter uses one frequency for several bit periods.

• Slow hopping

• Fast hopping

• Frequency hopping

• Spread Spectrum

Which of the following technique separates the whole spectrum into smaller non-overlapping frequency bands?

• Space Division Multiplexing

• Frequency Division Multiplexing

• Time Division Multiplexing

• Code Division Multiplexing

What is the bandwidth of 4G Technology?

• 2 Mbps

• 1 Gbps

• 2 Kbps

• 64 Kbps