CTA Wireless Communications & Mobile Technologies 2

Question 1

Which cellular network element manages radio resources and controls base stations in a 4G LTE network?

Accepted Answer

eNodeB (eNB)

Answer

In LTE, the eNodeB (evolved Node B) manages radio resource allocation and connects directly to the core network, unlike older architectures with separate controllers.

Question 2

What is the approximate maximum theoretical downlink speed for LTE Advanced (LTE-A)?

Accepted Answer

1 Gbps

Answer

LTE Advanced, through carrier aggregation and advanced MIMO, achieves theoretical peak downlink speeds of up to 1 Gbps.

Question 3

In a CDMA system, how are multiple users distinguished on the same frequency channel?

Accepted Answer

By unique spreading codes

Answer

CDMA assigns each user a unique pseudo-random spreading code, allowing all users to share the same frequency simultaneously.

Question 4

What does OFDMA stand for and what is its key advantage in 5G NR?

Accepted Answer

Orthogonal Frequency Division Multiple Access; it allows multiple users to share subcarriers simultaneously

Answer

OFDMA divides the available spectrum into subcarriers that can be assigned to different users simultaneously, improving efficiency in dense networks.

Question 5

Which unlicensed spectrum band is most commonly used by Bluetooth devices?

Accepted Answer

2.4 GHz ISM band

Answer

Bluetooth operates in the 2.4 GHz ISM (Industrial, Scientific, and Medical) band, using frequency hopping to reduce interference.

CTA - Certified Telecommunications Analyst Practice Test

CTA - Certified Telecommunications Analyst Practice Test

CTA Wireless Communications & Mobile Technologies 2