# Practice Quiz in Digital Transmission Part 4

Online Practice Quiz in Digital Transmission part 4 from the book Data Communications and Networking 4th Edition by Behrouz A. Forouzan.

This is the Online Practice Quiz in Digital Transmission part 4 from the book, Data Communications and Networking 4th Edition by Behrouz A. Forouzan. If you are looking for a reviewer in Electronics Systems and Technologies (Communications Engineering) this will definitely help you test your knowledge and skill before taking the Board Exam.

### Continue Part IV of the Online Practice Quiz

#### Quiz in Digital Transmission

Question 31. In ______, the change or lack of change in the level of the voltage determines the value of the bit.

A. NRZ-L

B. NRZ-I

C. both (a) and (b)

D. neither (a) nor (b)

Question 32. The ________ mode provides synchronization for the entire stream of bits must. In other words, it guarantees that the data arrive at a fixed rate.

A. isochronous

B. synchronous

C. asynchronous

D. none of these

Question 33. The signal rate is sometimes called the ____ rate.

A. bit

B. baud

C. signal

D. none of these

Question 34. In _________ transmission, we send bits one after another without start or stop bits or gaps. It is the responsibility of the receiver to group the bits.

A. synchronous

B. asynchronous

C. isochronous

D. none of these

Question 35. ______ substitutes four consecutive zeros with 000V or B00V.

A. HDB3

B. B4B8

C. B8ZSf

D. none of these

Question 36. The data rate is sometimes called the ___ rate.

A. bit

B. baud

C. signal

D. none of these

Question 37. ________ provides synchronization without increasing the number of bits.

A. Line coding

B. Block coding

C. Scrambling

D. None of these

Question 38. In ______ schemes, the voltages are on the both sides of the time axis. For example, the voltage level for 0 can be positive and the voltage level for 1 can be negative.

A. unipolar

B. bipolar

C. polar

D. all of these

Question 39. A _________ digital signal includes timing information in the data being transmitted.

A. self-synchronizing

B. self-transmitted

C. self-modulated

D. none of these

Question 40. The idea of RZ and the idea of NRZ-L are combined into the ________ scheme.

A. Manchester

B. differential Manchester

C. both (a) and (b)

D. none of these

### More Practice Quiz in Digital Transmission

Practice Quiz Part 1

Practice Quiz Part 2

Practice Quiz Part 3

Practice Quiz Part 4

Practice Quiz Part 5

### Complete Practice Quiz in Data Communications and Networking

Note: After taking this particular quiz, you can proceed to check all the topics.

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