ECAT Computer Science Online Test With Answers

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ECAT Computer Science Online Test

Sr. # Questions Answers Choice
1 Logical security for on-line systems is achieved primarily by ________ and authorization codes MIS Passwords Tactical None of the above
2 What does the acronym ISDN stand for? International Services Data Network Intelligent Services Digital Network Integrated Services Digital Network Interactive Services Digital Network
3 Who invented the modem? IBM DEC AT&T information System, USA Apple computers Inc
4 A driver is. hardware a peripheral device a card software
5 Now-a-day computers all over the world can talk to each other. Which is one of the special accessories essential for this purpose? Fax card Modem card Network Adapter card DVD
6 Cabling on a linear bus topology can be extended using which of the following? Terminator Barrel connector Network adapter card Medium attachment unit
7 What best describes a bus topology network? The number of computers on the network does not affect performance Easier to troubleshoot than other topologies Needs significantly more cabling than other topologies Media is inexpensive and easy to work with
8 Which of the following topologies is passive? Star topology Ring topology Bus topology Hybrid topology
9 Which of the following statements best describes a star topology? Needs significantly less cabling than other topologies Breaks in a single cable segment takes down entire network More difficult to reconfigure than other topologies Centralized monitoring and management
10 Which of the following does not provide a graphical user interface. OS/2 MS-DOS Macintosh Windows NT Workstation
11 A device that connects multiple nodes to the network is. A modem A repeater A router A hub
12 Which of the following is not a category of network problems. Newsgroup problems Physical problems Electrical problems Viruses
13 The media Access Control sublayer resides in which OSI layer? Physical Data Link Network Transport
14 What enables a computer to work with a printer? Protocols Drivers Packet processor HCL
15 Token passing prevents data collisions by. Using code to steer tokens around each other Having multiple tokens take alternate routes. Allowing only one computer at a time to use the token Using zones to control network traffic congestion
16 Which of the following access methods listens to the cable for network traffic before sending data? Token passing Polliing CSMA/CA CSMA/CD
17 What layer of the OSI model does data compression? Network Data Link Presentation Physical
18 Project 802 defines standards for which layers of the OSI model? Application and Presentation layers Physical an Date Link layers Transport and Network layers Network and Data Link layers
19 A network of geographically distant computers and terminals is called a. bus WAN gateway LAN
20 People on a LAN can share. Printer CD/ROM disk drive modem fax machine All of the above
21 The transfer if encoded information from one location to another by a communication channel is called data processing data distribution data communication data encryption
22 Pick up wrong logical expression
23 According to Boolean algebra x + 1 = ______________ 0 1 x
24 0 1 x
25 0 1 x
26 According to Idempotent law , x + y = __________ 1 0 x x . x
27 In a three input NAND gate, if all the inputs are 1, the output is. 0 1 3 indeterminate
28 The number of inputs to full adder are 1 2 3 4
29 The half adder circuit has one input two inputs three inputs always more than two inputs
30 The heart of analog to digital converter (ADC) is comparator pulse generator voltage source current source
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