Description : Which of the following is not a transmission medium? a. telephone lines b. coaxial cables c. modem d. microwave systems
Last Answer : microwave systems
Description : A large numbers of computers in a wide geographical area can be efficiently connected using (A) twisted pair lines (B) coaxial cables (C) Communication satellites (D) all of the above
Last Answer : (D) all of the above
Description : When a group of computers is connected together in a small area without the help of telephone lines, it is called : (1) Remote Communication Network (RCN) (2) Local Area Network (LAN) (3) Wide Area Network (WAN) (4) Value Added Network (VAN)
Last Answer : Local Area Network (LAN)
Description : In a fully-connected mesh network with 10 computers, total .............. number of cables are required and ................ number of ports are required for each device. (A) 40, 9 (B) 45, 10 (C) 45, 9 (D) 50, 10
Last Answer : (C) 45, 9
Description : What resulted when various US government agencies and universities began linking computer systems together via cables and satellites in the 1970?
Last Answer : It is known as the internet. The internet has been around longerthan you think. It actually started back in the 70s.
Description : In the original ARPANET,_______ were directly connected together. A) IMPs B) host computers C) networks D) routers
Last Answer : IMPs
Description : The …………………………. Is a collection of protocols designed by Internet Engineering Task Force(IETF) to provide security for a packet at the Network level. A) IPsec B) Netsec C) Packetsec D) Protocolsec
Last Answer : A) IPsec
Description : According to Coast Guard Regulations (46 CFR), the talking and calling circuits of a sound powered telephone system must be _____________. A. intrinsically safe B. independent of each other C. independently grounded D. connected to a common ground
Last Answer : Answer: B
Description : Which of the following statements is correct concerning the circuits in a sound powered telephone system? A. The ringing circuit is composed of only one common wire to ground. B. The common ... connected to each station. D. The talking and calling circuits are electrically dependent upon each other.
Description : In a ................topology, if there are n devices in a network, each device has n-1 ports for cables. A) Mesh B) Star C) Bus D) Ring
Last Answer : A) Mesh
Description : Which of the following is not a transmission medium? (a) Telephone lines (b) Co_axial cable (c) Modem (d) Microwave system -Technology
Last Answer : (c) All are communication channel but modem is a dev that convert analog signals to digital signals or vice-versa
Description : ECE Board Exam March 1996 Modems are required to connect computer to telephone lines because ___________. A. telephone company rules required them B. the telephone network bandwidth is too high C. none of the above D. the telephone network will pass direct current
Last Answer : D. the telephone network will pass direct current
Description : Which of the following is/are side effects of scan conversion? a. Aliasing b. Unequal intensity of diagonal lines c. Over striking in photographic applications d. Local or Global aliasing (1) a and b (2) a, b and c (3) a, c and d (4) a, b, c and d
Last Answer : a, b, c and d
Description : A group of computers connected together with the help of cables within an office building is called (a) PAN (b) WAN -Technology
Last Answer : (d) Using LAN, we can connect computers within a building only.
Description : A group of computers connected together through a central sever using cables and other communication devices is known as ____. a) Network b) LAN c) WAN d) None of the above
Last Answer : A group of computers connected together through a central sever using cables and other communication devices is known as Network
Description : When the computer network uses telephone lines as communication channel -Technology
Last Answer : MODEMperforms the task of Modulation at sender's site and DEModulation at the receiver's end. Basically, our computer generates data in the form of digital signals which needs to be forwarded ... signals should be converted back to the original digital signals, then this is called demodulation.
Description : The first Network was called ________ a) CNNET b) NSFNET c) ASAPNET d) ARPANET
Last Answer : d) ARPANET
Description : ARPANET stands for: a) American Research Project Agency Network b) Advanced Research Project Agency Network c) Admissible Research Project Agency Networking d) None of Thesse
Last Answer : b) Advanced Research Project Agency Network
Description : POP3 and IMAP are e-mail accounts in which (A) One automatically gets one’s mail everyday (B) One has to be connected to the server to read or write one’s mail (C) One only has to be connected to the server to send and receive email (D) One does not need any telephone lines
Last Answer : (C) One only has to be connected to the server to send and receive email
Description : Different computers are connected to a LAN by a cable and a (1) modem (2) interface card (3) special wires (4) telephone lines
Last Answer : interface card
Description : Sound powered telephone units 'I', 'II', and 'III' of the circuit shown in the illustration are for 'station numbers' _____________. EL-0093 A. 2, 4 and 6 B. 1, 2 and 3 C. 3, 5 and 8 D. 1, 2 and 6
Last Answer : Answer: D
Description : The diagrams shown in the illustration represent a/an _______________. EL-0093 A. engine order telegraph circuit B. rudder angle indicator arrangement C. engine speed tachometer with repeaters D. sound powered telephone system
Description : The transmit and receive elements of a sound-powered telephone handset are _____________. A. identical and can be used for either function B. of similar construction but different enough to be used only for ... only for its own function D. constructed so that each can fit only in its own recess
Last Answer : Answer: A
Description : The pushbutton on the handset of a ship's sound-powered telephone must be depressed to ______________. A. talk then released to listen B. listen then released to talk C. both talk and listen D. ring the station being called
Last Answer : Answer: C
Description : What common shipboard system does figure 'A' represent? EL-0092 A. Navigational running lights B. Rudder angle indicator C. Sound powered telephone D. Winch speed control
Description : The electrical energy necessary to transmit a person's voice over a sound-powered telephone circuit is obtained from _____________. A. dry cell batteries B. the ship's service switchboard C. the emergency switchboard D. the speaker's voice
Description : In a fully connected mesh network with n devices, there are ................ physical channels to link all devices. (A) n(n–1)/2 (B) n(n+1)/2 (C) 2n (D) 2n+1
Last Answer : (A) n(n–1)/2
Description : Both Infrared and Microwave bands are invisible to the human eye. Then how are IR and microwave images from remote sensing satellites printed? How do they substitute the wavelengths?
Last Answer : Both infrared and microwaves are part of the electromagnetic spectrum, which stretches from radio waves to gamma rays. each band of this spectrum corresponds to a small range of frequencies. Each ... levels) are finally printed on a computer screen as a picture or as a conventional photograph.
Description : …………………. is a group of interested components working together towards a common goal by accepting inputs and producing outputs in an organized transformation process. A) System B) Network C) Team D) System Unit
Last Answer : A) System
Description : A pure ALOHA Network transmit 200 bit frames using a shared channel with 200 Kbps bandwidth. If the system (all stations put together) produces 500 frames per second, then the throughput of the system is .............. (A) 0.384 (B) 0.184 (C) 0.286 (D) 0.586
Last Answer : (B) 0.184
Description : Which virus was first detected in ARPANET / ARPANET , the pioneer of Internet in the early 1970's ?
Last Answer : The first Creeper virus was first identified in the early 1970 's in the Internet pioneer ARPANET / ARPANET.
Description : What are the difference between Arpanet and internet?
Last Answer : ARPANET is the computer network developed by the U.S. Department of Defense in 1969 from which the Internetoriginated.
Description : The original ______grew into the internet: a) CASDER b) ARPANET c) INFANET d) None of These
Last Answer : b) ARPANET
Description : ………………...is a minimal protocol that allows isolated hosts to link via TCP/IP over the telephone network and ………………..uses a proposed international standard for transmitting HDLC over asynchronous lines. A. LCP, PPP B. PPP, LCP C. SLIP, PPP D. PPP, SLIP
Last Answer : C. SLIP, PPP
Description : Some places have national dishes, if the Earth had a global dish, what would it be?
Last Answer : Some kind of stew. Stews of various types are pretty common in a lot of countries.
Description : When a mobile telephone physically moves from one to another cell, the base station transfers ownership to the cell getting strongest signal. This process is known as................. (A) handoff (B) mobile switching (C) mobile routing (D) cell switching
Last Answer : (A) handoff
Description : Which of the following is widely used inside the telephone system for longhaul data traffic ? (A) ISDN (B) ATM (C) Frame Relay (D) ISTN
Last Answer : (B) ATM
Description : Do I need telephone service to have the internet connected?
Last Answer : Home telephone, land-line service is not required in order to have internet access today. Freestanding DSL technology makes it possible to get fast internet connection without a phone. EarthLink is one provider of ... through your cable TV company then no you do not need to have a home phone line.
Description : Which of the following network is used to connect a number of computers to eachother by cables in a single location? a. LAN b. Internet c. WAN d. MAN
Last Answer : a. LAN
Description : How many satellites do the global positioning systems gps use?
Last Answer : The standard GPS pulls data from over 50 satellites at a time. They use data from all of the satellites in conjunction with one another to provide you with helpful location data.
Description : What kind of satellites are used for Global Positioning Systems?
Last Answer : GPS uses satellites that were placed into orbit by the Department of Defense. The government set up the entire network on their own, and it is free to use as long as you already have a GPS device.
Description : The minimum number of geostationary satellites needed for un-interrupted global coverage is (1) 3 (2) 2 (3) 4 (4) 1
Last Answer : (2) 2 Explanation: In theory, 2 satellites in diametrically opposite geosynchronous orbits could cover the planet. In order for the satellites to communicate, a minimum of 3 would be needed, ... At this point, the strength and quality of coverage increases proportionally to the number of satellites.
Description : The minimum number of geostationary satellites needed for uninterrupted global coverage is : (1) 3 (2) 2 (3) 4 (4) 1
Last Answer : 2
Description : A package is a collection of A) classes B) interfaces C) editing tools D) classes and interfaces
Last Answer : D) classes and interfaces
Description : …………… can be defined as data that has been processed into a form that is meaningful to the recipient and is of real or perceived value in current or prospective decisions. A) Information B) Data collection C) Internal data D) Sample data
Last Answer : A) Information
Description : A graph is a collection of nodes, called ………. And line segments called arcs or ……….. that connect pair of nodes. A) vertices, edges B) edges, vertices C) vertices, paths D) graph node, edges
Last Answer : A) vertices, edges
Description : In RDBMS, Data is presented as a collection of ............ A) Table B) Attributes C) Relations D) Entities
Last Answer : C) Relations
Description : Images tend to be very large collection of data. The size of memory required for a 1024 by 1024 image in which the colour of each pixel is represented by a n-bit number, (in an 8 bit machines) is (A) n × 8 MB (B) n / 8 MB (C) (1024 × 1024) / 8 MB (D) 1024 MB
Last Answer : (B) n / 8 MB
Description : If h is chosen from a universal collection of hash functions and is used to hash n keys into a table of size m, where n ≤ m, the expected number of collisions involving a particular key K is (A) less than 1 (B) less than lg n (C) greater than 1 (D) greater than lg n
Last Answer : (A) less than 1