Download JNTUK (Jawaharlal Nehru Technological University Kakinada (JNTU kakinada)) M.Tech (ME is Master of Engineering) 2020 R19 ECE Digital Data Communications Model Previous Question Paper
[M19 CS 1101]
I M. Tech I Semester (R19) Regular Examinations
DIGITAL DATA COMMUNICATIONS
DEPARTMENT OF ELECTRONICS & COMMUNICATIONS ENGINEERING
MODEL QUESTION PAPER
TIME: 3Hrs. Max. Marks: 75 M
Answer ONE Question from EACH UNIT.
All questions carry equal marks.
*****
CO KL M
UNIT-I
1. a). Explain the principle of QAM with the help of a neat diagram. 1 5 8
b). What is a constellation diagram? Explain the constellation diagram
of 16QAM.
1 1 7
OR
2. a). Explain the OSI model for networking in brief. How does it differ
from TCP/IP model?
9 5 8
b). What are different types of digital data transmission modes? Explain
with examples.
4 2 7
UNIT-II
3. a). With the help of a neat diagram, explain the DTE-DCE interface. 2 5 8
b). Explain the varis network topologies and compare the
performance of each
3 5 7
OR
4. a). What are the varis types of error correction codes? Explain any
one.
6 2 8
b). Compare the synchrons and asynchrons data link protocols. 6 5 7
UNIT-III
5. a). What are the different types of packet switching? Explain. 8 2 8
b). Explain the architecture of IEEE 802.6. 9 2 7
OR
6. a). What are the different functions of bridges in the network? Explain
varis types of bridges used in the network.
7 1,5 8
b). Compare the time division and frequency division multiplexing
techniques.
7 5 7
UNIT-IV
7. a). What is the need for multiplexing and explain varis types of
multiplexing techniques?
1 2 8
b). Explain varis LAN topologies. 1 5 7
OR
8. a). Compare varis switching techniques in detail. 8 5 8
b). Explain the function of varis internetworking devices. 8 5 7
UNIT-V
9. a). Briefly explain varis multiple access techniques. 1 5 8
b). What are the demerits in OFDMA? Explain how they can be
overcome?
10 2 7
OR
10. a). Explain the principle and working advantages and applications of 10 5 8
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1
[M19 CS 1101]
I M. Tech I Semester (R19) Regular Examinations
DIGITAL DATA COMMUNICATIONS
DEPARTMENT OF ELECTRONICS & COMMUNICATIONS ENGINEERING
MODEL QUESTION PAPER
TIME: 3Hrs. Max. Marks: 75 M
Answer ONE Question from EACH UNIT.
All questions carry equal marks.
*****
CO KL M
UNIT-I
1. a). Explain the principle of QAM with the help of a neat diagram. 1 5 8
b). What is a constellation diagram? Explain the constellation diagram
of 16QAM.
1 1 7
OR
2. a). Explain the OSI model for networking in brief. How does it differ
from TCP/IP model?
9 5 8
b). What are different types of digital data transmission modes? Explain
with examples.
4 2 7
UNIT-II
3. a). With the help of a neat diagram, explain the DTE-DCE interface. 2 5 8
b). Explain the varis network topologies and compare the
performance of each
3 5 7
OR
4. a). What are the varis types of error correction codes? Explain any
one.
6 2 8
b). Compare the synchrons and asynchrons data link protocols. 6 5 7
UNIT-III
5. a). What are the different types of packet switching? Explain. 8 2 8
b). Explain the architecture of IEEE 802.6. 9 2 7
OR
6. a). What are the different functions of bridges in the network? Explain
varis types of bridges used in the network.
7 1,5 8
b). Compare the time division and frequency division multiplexing
techniques.
7 5 7
UNIT-IV
7. a). What is the need for multiplexing and explain varis types of
multiplexing techniques?
1 2 8
b). Explain varis LAN topologies. 1 5 7
OR
8. a). Compare varis switching techniques in detail. 8 5 8
b). Explain the function of varis internetworking devices. 8 5 7
UNIT-V
9. a). Briefly explain varis multiple access techniques. 1 5 8
b). What are the demerits in OFDMA? Explain how they can be
overcome?
10 2 7
OR
10. a). Explain the principle and working advantages and applications of 10 5 8
2
CDMA.
b). Explain the principle and working of CSMA/CA technique in
detail.
7 2 7
CO-CRSE TCOME KL -KNOWLEDGE LEVEL M-MARKS
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This post was last modified on 28 April 2020