Top Interview questions & Answer for Communication Engineering

In this tutorial, we are going to learn about the Top Interview questions & Answer for Communication Engineering

1. What is communication?


Communication denotes the exchange of information, where a message is sent and received. it can be either half-duplex. full-duplex and simplex.

2. What is a channel with respect to communication?


It is to transmit and receive information, the path is required which path is called communication channel. It can be either a cable (fibre, optic, twisted pair etc.) or can be broadcast (satellite, radio etc.)

3. What is half-duplex?


It uses a single path for communication. While basically using only one path we can either transmit or receive at a time but not at the same time & here is an example one way traffic, walkie-talkie.

4. What is full-duplex?


Full duplex means information can be sent and received in both directions (from the sender side and receiver side) at the same time. Example: highway road – on both sides vehicles can move at the same time.

5. What is a simplex communication system?


 In the simplex communication system, we either transmit or receive but we cannot do both at the same time and this is an example in the broadcast system only one transmitter is used to transmit information but one or many receivers will be used to receive it (news headlines scrolling in TV).

6. What is Router?


It is a networking device that forwards data packets between computer networks and it performs the traffic directing functions on the Internet. This data is sent through the internet, like a web page or email, It is in the form of data packets.

7. What is serial and parallel communication?


 Data can be transmitted between a sender and a receiver in two main ways:

  • 3. Serial communication is the method of translating one bit at a time through a medium. for example: Ethernal, RS-232, USB etc
  • 4. Parallel communication is the method of transferring blocks. for example a BYTE of data is transmitted at the same time.

For example Computer peripheral buses like ISA, ATA, SCSI, PCI, RAM etc.

8. Define modulation


Modulation is a technique to transmit a signal over a long distance by varying properties of a waveform in a carrier signal.

9. What is coding?      


Messages are transmitted and received as bits. Based on the different applications we make the bits to fit into it accordingly. there are four different types of coding. they are

10. What are the different types of coding?


Below are the types of coding

  • Data compression
  • Error correction
  • Cryptographic coding
  • Line coding

11. Why antenna is required?


Transmission and reception of signals in proper frequency can be done by the antennas. this transmission and reception of signals can be a single direction or multiple directions. this depends upon the directivity of the antenna. the length of the antenna is decided by the frequency of transmission or reception.

12. What is a repeater?


It is an electronic device that receives a signal and retransmits and it is used to extend transmissions due to this the signal can cover longer distances or be received on the other side of an obstruction. 

13. What is a base station?


It simple works it is like host computer access details are maintained. The base station is where many antennas will be placed so that many users get connected to it.

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