Telecom Engineer Interview Questions and Answers

Telecom Engineer job Interview Questions and Answers

Telecommunication engineering is increasing its demand day by day across the world and the engineers in this field also get their desired job easily. Still, they need to be prepared for the interview as a recruiter wants to test the skills, especially the technical knowledge. Here some questions along with the answers are given to make your idea about the possible question types that you may go through in the interview process. It is a suggestion to give you some initial information regarding the interview, so you can add your own knowledge to make your answer.

1 Q. What is GSM and CDMA telecommunication?

A: GSM (Global Division system for Mobile) uses multiple frequencies as well as less bandwidth for the communication. It accesses signal through TDMA and FDMA and its voice rate is 9.6 kbps, whereas, CDMA (Code Division Multiple Access) telecommunication uses a single frequency with the voice rate of 14.4 kbps.

2 Q. Explain the call forwarding system.

A: a call forwarding technique deals with sending CPG message to the originator. It is sent by the switch and when the switch gets the setup, it checks the call forwarding option is active or not. If it’s active, then the call is forwarded as per the stated location. In between, the switch sends the CPG message to the originator for informing the call is in progress mood.

3 Q. Discuss ss7 in telecommunication.

A: Common Channel Signaling System No. 7 is the global standard for channel signaling standardized by the International Telecommunication Union (ITU) Telecommunication Standardize Sector (ITU-T). The procedure of which, helps in exchanging information over a digital signal through the public switch telephone network. It helps in controlling messages, routing and call setup.

4 Q. Explain what is MTU.

A: MTU (Maximum Transmission Unit) is the largest packet size that a specific layer of a communication protocol passes to the destination. The size is measured in bytes. MTU uses a communication interface, such as NIC, serial port to carry out the given task. The standard of MTU is defined by the Ethernet recommendation standard. Higher MTU comes with the higher bandwidth.

5 Q. Explain the bridging in communication.

A: it is a technique, used in packet switched network for examining the source address to locate the unknown device. Once the address is located, it is saved in Mac addressed table for further communication. It uses the transparent bridging as used in the Ethernet. It also uses the token ring network in the source route bridging.

6 Q: What is buffering?

A: it is the storage of data within transmitting medium. A buffer is a memory that stores data in an input and output operation.  It controls the data communication until the receiver is ready to receive the information. An alarm is coded into the buffer which is read, sent and resent until it gets authorization from the receiving end.

7. Q. What is synchronous transmission?

A: synchronous transmission is used in transferring data at a quick rate as it does not follow the start and stop bit. Its each component uses a clock signal to transfer data and it is synchronized by speeding up both receiving and sending end. The method uses the check digit to ensure the received byte is perfectly interpreted.

8 Q: what is an infinite impulse response (IIR)?

A: infinite impulse response is a component of a signal processing system that uses analog filter namely RC filter to feed the node. Its function is non-zero for the infinite length of time.

9 Q: what is asynchronous transmission?

A: asynchronous transmission uses the start and stop bits to identify an ASCII character that is transmitted and the receiver gets the data.   The length of time differs in each transmission of character as time intervals are different between each transmission of character. The start and stop bits are used to address the receiver that the character is entered and the transmission is completed respectively.

10 Q: Explain the importance of SGM in ISUP?

A: when the message size is exceeded from the defined SS7 packets (272 octets), then it is segmented and sends to the destination. It sends an additional segment to the destined signaling point.