InterviewSolution

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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

51.	Which multiplexing technique used to transmit digital signals?(a) FDM(b) TDM(c) WDM(d) FDM & WDMThis question was posed to me during an interview for a job.My question is taken from Multiplexing in section Security & Physical Layer of Computer Network
Answer» Correct choice is (b) TDM The explanation: TDM ABBREVIATION for Time Division Multiplexing is a method used for digital signals. Whereas FDM and WDM abbreviation for Frequency Division Multiplexing, and Wavelength Division Multiplexing, are used for analog signals. TDM is used in applications like ISDN (Integrated Services Digital NETWORK) and PSTN (Public Switched Telephone Network).

52.	Multiplexing is used in _______(a) Packet switching(b) Circuit switching(c) Data switching(d) Packet & Circuit switchingThe question was asked in an interview for internship.My enquiry is from Multiplexing topic in portion Security & Physical Layer of Computer Network
Answer» Correct option is (B) Circuit switching Explanation: Circuit switching is a switching METHOD by which one can obtain a physical path between end POINTS. Circuit switching method is also called a connection oriented network. Two nodes must be physically and LOGICALLY CONNECTED to each other to create a circuit switching network.

53.	The sharing of a medium and its link by two or more devices is called _________(a) Fully duplexing(b) Multiplexing(c) Micropleixng(d) DuplexingThis question was addressed to me during a job interview.My question is from Multiplexing in chapter Security & Physical Layer of Computer Network
Answer» Right CHOICE is (B) MULTIPLEXING Best explanation: Multiplexing is a method using which one can send multiples signals through a SHARED medium at the same time. This HELPS in using less resources and thus saving the cost of sending messages.

54.	_____ is the multiplexing technique that shifts each signal to a different carrier frequency.(a) FDM(b) TDM(c) Both FDM & TDM(d) PDMI have been asked this question in an interview for internship.My doubt is from Topology in section Security & Physical Layer of Computer Network
Answer» CORRECT option is (a) FDM The explanation: FDM is an ABBREVIATION for Frequency Division MULTIPLEXING. This technique is used when the bandwidth of the channel is greater than the combined bandwidth of all the SIGNALS which are to be transmitted. The channel is active at all times unless a COLLISION occurs with another channel trying to use the same frequency. Some other multiplexing techniques are Time division multiplexing and Phase division multiplexing.

55.	In TDM, slots are further divided into __________(a) Seconds(b) Frames(c) Packets(d) BitsI have been asked this question in semester exam.This intriguing question originated from Topology topic in portion Security & Physical Layer of Computer Network
Answer» The CORRECT answer is (b) Frames Easiest explanation: TDM is the ABBREVIATION for Time division multiplexing. It is technique for combining several low RATE channels to a SINGLE high rate channel. For a certain time slot, the several channels could use the maximum BANDWIDTH. Each channel is inactive for a period of time too. Some other multiplexing techniques are Frequency division multiplexing and Phase division multiplexing.

56.	WAN stands for __________(a) World area network(b) Wide area network(c) Web area network(d) Web access networkI have been asked this question in homework.Enquiry is from Topology in division Security & Physical Layer of Computer Network
Answer» Right choice is (b) Wide area NETWORK Explanation: WAN is the abbreviation for Wide Area Network. This network extends over a large geographical area. These are used to connect CITIES, states or EVEN countries. They can be connected through LEASED lines or satellites.

57.	Data communication system within a building or campus is________(a) LAN(b) WAN(c) MAN(d) PANThis question was addressed to me in an interview for internship.My question is from Topology in division Security & Physical Layer of Computer Network
Answer» The correct choice is (a) LAN The best I can explain: LAN is an ABBREVIATION for Local AREA Network. This network interconnects COMPUTERS in a small area such as schools, offices, residence etc. It is the most VERSATILE kind of data communication system where most of the computer network CONCEPTS can be visibly used.

58.	Data communication system spanning states, countries, or the whole world is ________(a) LAN(b) WAN(c) MAN(d) PANThe question was asked in an interview for internship.This interesting question is from Topology in division Security & Physical Layer of Computer Network
Answer» Right OPTION is (b) WAN Best explanation: WAN is the abbreviation for WIDE Area Network. This network EXTENDS over a large geographical area. WANs are used to connect cities, states or even countries. A wireless CONNECTION is required to build a WAN. The best example of WAN is the Internet.

59.	_______ topology requires a multipoint connection.(a) Star(b) Mesh(c) Ring(d) BusThis question was addressed to me in an internship interview.This key question is from Topology topic in chapter Security & Physical Layer of Computer Network
Answer» Correct answer is (d) Bus Best explanation: In bus topology, there is a single cable to which all the network nodes are CONNECTED. So whenever a node tries to send a message or data to other nodes, this data PASSES through all other nodes in the network through the cable. It is really simple to install but it’s not secure ENOUGH to be USED in most of the computer network applications.

60.	Which network topology requires a central controller or hub?(a) Star(b) Mesh(c) Ring(d) BusI got this question by my school principal while I was bunking the class.Origin of the question is Topology in section Security & Physical Layer of Computer Network
Answer» The correct ANSWER is (a) Star Explanation: In star topology, no computer is connected to another computer DIRECTLY but all the computers are connected to a central hub. Every MESSAGE SENT from a source computer goes through the hub and the hub then forwards the message only to the intended destination computer.

61.	Physical or logical arrangement of network is __________(a) Topology(b) Routing(c) Networking(d) ControlI had been asked this question in an internship interview.This intriguing question originated from Topology topic in chapter Security & Physical Layer of Computer Network
Answer» The correct option is (a) Topology The best I can explain: Topology in networks is the structure or pattern in which each and every node in the network is CONNECTED. There are MANY topologies in networking like bus, tree, ring, star, mesh, and hybrid topology. There is no particular best topology and a suitable topology can be chosen BASED on the kind of APPLICATION of the network .