1. Digital communication is _______ to environmental changes?
A) Less sensitive
B) More sensitive
C) Does not depend
D) None of the mentioned
Answer D
2. Assume you are joining in telecommunication industry during your internship program, when
you are practicing in your industry, you get the challenges of miniating fixed line serves on
different markets. Therefore, what kinds of challenges you expect in digital transformation in case
of telecommunication industry.
A) Market integration service
C) Broadcasting services
B) Over-the-top (OTT) services
D) None of the mentioned
Answer A
3. Noise is added to a signal in a communication system
A) At the receiving end
C) In the channel
B) At transmitting end
D) During regeneration of the information
answer C
1
4. Calculate the amount of information if 𝑃𝑘 = 4
A) 2bits
B) 3bits
C) 4bits
D) 1bits
Answer A
5. The negative statement for Shannon’s theorem states that
A) If R > C, the error probability increases towards Unity
B) If R < C, the error probability
is very small
C) Both A & B
D) None of the above
Answer A
6. Which digital modulation technique is commonly used for 3G WCDMA?
A) QAM
B) FSK
C) BPSK
D) QPSK
Answer C
7. A modulated signal has a bit rate of 8000 bps and a baud rate of 1000 baud. How many bits
are carried by each signal element?
A) 8
B) 4
C) 6
D) 2
Answer A
8. suppose you are a system engineer in ZTE company, designing a part of the communication
systems. you are required to design a modulation scheme for three systems using MFSK, MPSK
and MQAM. Therefore, which one has highest modulation level among them
A MQAM
Answer A
B) MFSK
C) MPSK
D None