Best Telecommunication General Interview Questions

Q – 1 Do you know How does the traceroute work?

Ans- Trace route finds out when the packet has reached the destination point by including a port number that is outside of the normal range. When it is received, a “port unreachable” message is returned, enabling trace route to determine the time length of the final hop.

Q – 2 Tell me what is the difference between tcp and udp?

Ans- TCP is Transmission Control Protocol and connection oriented protocol.
UDP is User Datagram Protocol and connectionless protocol. use in stock market for information sending and receiving.

Q – 3 Tell me What is the layered architecture of the Internet? In a wireless network, describe how each layer would be different from a wired network?

Ans- 5- Layer architecture of the Internet:

Application (Layer 5)
Transport (Layer 4)
Network (Layer 3)
Data Link (Layer 2)
Physical (Layer 1)

Differences between wireless network and wired network:

(1) Wired network uses wires (e.g., twisted pair, coax, fiber optic) as transmission media in physical layer. Wireless network uses air waves, which requires different coding, modulation schemes.
(2) Interference and collision is much more severe in wireless networks. Data link layer in wireless network uses different techniques to avoid collision and make sure data was received.
(3) Wireless network needs to deal with device location and handover in network layer. In wireless ad hoc networks, routing can be different than wired networks.
(4) No big difference between wireless and wired network in transport layer.
(5) Application layer is unaware of the physical aspects of the network. Application layer in wired network supports services like FTP, SMTP etc. One can also take the physical layer characteristics into account when writing an application.

Q – 4 Do you know What is the type of signaling used between two exchanges?

Ans- different type of signalling in used betweeb two exchanges. its depend upon type of exchange some exchange used q sig between each other some excahnges used isdn between exchanges. so many other type. there are five tyope of signaling is being used in the world

Q – 5 Explain Buffering?

Ans- Buffering is a method of overlapping the computation of a job with its execution. It temporarily stores input or output data in an attempt to better match the speeds of two devices such as a fast CPU and a slow disk drive. If, for example, the CPU writes information to the buffer, it can continue in its computation while the disk drive stores the information.

Q – 6 Tell me At what Frequency voice is sampled?

Ans- It is sampled at 8Khz as per Sampling theorem to reproduce successfully in the other end.

Q – 7 Tell me What is the Maximum number of satellite hops allowed in voice communication?

Ans- Only Two Hops

Q – 8 Tell me What is the time taken for 1 satellite hop in voice communication?

Ans- The time taken for 1 satellite hop in voice communication is 1/2 seconds

Q – 9 Tell me What is the frequency range used for Bluetooth in INDIA?

Ans- Bluetooth Works on 2.4 GHz

Q – 10 What is VSWR?

Ans- VSWR STANDS FOR VOLTAGE STANDING WAVE RATIO

THE RATIO OF THE MAXIMUM TO MINIMUM VALUE OF STANDING WAVE PATTERN ALONG A TRANSMISSION LINE TO WHICH A LOAD IS CONNECTED.

IT SHOW HOW MUCH SIGNAL IS TRANSMITTED AND REFLECTED BACK.

USING SITE MASTER WE CAN MEASURE VSWR. ITS RANG IS 1.00-1.30

Q – 11 Explain What kind of internet speed control facilities (exact name) do internet service provider use and is it possible to check internet speed of each individual consumer like speedtest.net does?

Ans- make a server and check individual internet speed

Q – 12 Explain the difference between NOC & NMS?

Ans- Network operation center (NOC). NOCs are responsible for monitoring the network for alarms like as power fail, Service affected alarm (site down,LAPD OML fault, TRX close HPA alarm etc)& communicate its field engineer to solved the problem. if need any support for software base they provide to recover the problem.

A Network Management System (NMS) is a combination of hardware and software used to monitor and administer a network. Communicate with NOC recover the Alarm.

NMS–>NOC–>Field Engineers=Solved the problem

Q – 13 Tell me BTS configuration 4+2+2?

Ans- as per the utilization of sector,we can configure the sectors a,b,c like below combination…

if 1st sector utilization is high 4+2+2
if 2nd sector utilization is high 2+4+2
if 3rd sector utilization is high 2+2+4

Q – 14 Tell me What is the total output power of an complete BTS, in dbm and watts?

Ans- 43dbm/20Watt is the output power of one TRx.The total output power depends on the number of Trx.

Q – 15 Do you know WHAT IS THE FREQUENCY BAND FOR 3G?

Ans- 2100 MHZ Not 2100 only

Q – 16 Tell me Why the RSL of microwave link is in -ive?

Ans- Because it is very low value which have less loss of signal and less interfernce.

Q – 17 Explain what is Blackberry? please make it clear for a layman?

Ans- Blackberry is a top most Brant & high speed internet using cell phone on this cell phone available many more advanced options so very comparable cell phone for every parson

Q – 18 Explain what is BTS? What are its different configurations and what is the power consumption/peak current for each of these types of BTS?

Ans- BTS abbreviated for Base Transiever Station is a collection of transmission and reception card designed for routing of signals from end user to msc and vice versa.

There are many types of BTS depending on the manufacturing companies viz nokia,ericcsion, zte,huwai etc …i’ve worked on a few so can tell u about them in nokia there is practically 2,2,2/4,4,4/8,8,8 configuration but this may vary depending upon the traffic requirement of the circle. mostly composite configurations are used, like 2,3,3 or 2,2,4 etc.

These nos are nothing but no of trx cards in each sector , for example 2,2,2 is 2 trx cards in each of three sectors.
Power consumption also is different for each type of BTS, for NOKIA’s Flexi indoor BTS running on 222 config power requiremnt will be approx 48 watts per hour typically on every BTS 48V is supplied with negative polarity. feel free to mail me for any further doubts

Q – 19 What is the height of BTS?

Ans- generally height of an antenna is 45m to 70m accorading to as par geographycal area hight……..it is change from area to area………

Q – 20 What is What is the height of ESMA card?

Ans- 3(HEIGHT UNIT)