PPSC Computer Science Full Book test With Answers

PPSC Computer Science Full Book test

Sr. # Questions Answers Choice
1 If a computer on the network shares resources for others to use. it is called. Server Client Main frame None
2 A protocol is a set of rules governing a time sequence of events that must take place. Between peers Between an interface Between moderns Across an interface
3 Which of the following transmission system provide the highest data rate to in individual device. Computer bus Telephone lines Voice and mode Lease lines
4 A data terminal serves as an Effector Sensor Both a and b Neither a nor b
5 The channel in the data communication model can be. Postal mail services Telephone lines radio lines Any of the above
6 In a synchronous modem the receive equalizer is known as Adaptive equalizer Impairment equalizer Statistical equalizer Compromise equalizer
7 The receive equalizer reduces delay distortions using a Tapped delay lines Gearshift Descrambler Difference engine
8 Terminal are required for Real time batch processing and time sharing. Real time time sharing and distributed message processing. Real time distributed processing and manager inuiry Real time time sharing and message switching
9 An example of digital rather than analog communication is DDD DDS DDT WATS
10 What is the main difference between DDCMP and SDLC. DDCMP does not need spectral hardware to final the beginning of a message DDCMP has a message header SDLC has a IP address SDLC does not use CRC
11 Number of bits per symbol used in biodot code is. 5 7 8 9
12 An example of an analog communication method is. Laser beam Micro wave Voice grade telephone line All of the above
13 Data communications monitors available on the software marked include. ENVIRON/1 TOTAL BPL Telnet
14 While transmitting odd panty coded symbols the number of zeros in each symbol is. Odd Even a and b both Un known
15 In communication satellite multiple repeaters are known as Detector Modulator Stations Transponders
16 A examples of medium speed switched communications service is Series 1000 Data phone 50 DDD All of above
17 Communication circuits that transmit data in both directions but not a the same time are operating in A simplex mode A half duplex mode A full duplex mode An asynchronous mode
18 Avalanche photodiode receivers can detect bits of transmitted data by receiving. 100 photons 200 photons 2000 photons 300 photons
19 the loss in signal power as light travels donw the fiber is called. Attenuation Progragation scathering Interruption
20 the transmission signal coding method of TI carrier is called Bipolar NRZ Binary Manchester
21 The transmission signal coding method of TI carrier is called. Bipolar NRZ Manchester Binary
22 Which of the following is required to communicate between two computers. Communications software Protocol <div>Communication Hardware</div> All of above including access to transmission medium
23 Which of the following is an advantage to using fiber optics data transmission. Resistance to data theft Fast data transmission rate Low noise level All of above
24 Which of the following signal is not standard RS-232 -C signal VDR RTS CTS DSR
25 Which of the following does ot allow multiple uses or devices to share one communication line. Double plexer Multiple plexrr Concentrator Controller
26 Which of the following is not a transmission medium. Telephone lines Coaxial cables Modem Micro wave systems
27 Which of the following is considered a broad band communication channel. Coaxial cable Fiber optics cable Microwave circuits All of above
28 The interactive transmission of data with in a time sharing system may be best suited to. Simplex lines Half duplex lines full duplex lines Biflex lines
29 What is the number of separate protocol layers at the steric interface gateway specified by the X.25 standard. 2 3 4 6
30 Which of the following might be used by a company to satisfy its growing communications needs. Front and processor Multiplexer Controller All of the above
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