Monday, 23 November 2015

IBPS Bank Jobs I.T. Officer Exam : (Data Communication and Networking) - expected 50 Questions and answers



1. In OSI network architecture, the dialogue control and token management are responsibilities of:
a) Session Layer
b) Network Layer
c) Transport Layer
d) Data Link Layer
e) None of The Above

2. In OSI network architecture, the routing is performed by:
a) Network Layer
b) Data Link Layer
c) Transport Layer
d) Session Layer
e) None of The Above

3. Which of the following performs modulation and demodulation?
a) Fiber Optic
b) Satellite
c) Coaxial cable
d) Modem
e) None of The Above

4. The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as:
a) Modulation
b) Demodulation
c) Synchronizing
d) Digitizing
e) None of The Above

5. How many OSI layers are covered in the X.25 standard?
a) Two
b) Three
c) Seven
d) Six
e) None of The Above

6. Layer one of the OSI model is:
a) Physical Layer
b) Link Layer
c) Transport Layer
d) Network Layer
e) None of The Above

7. The X.25 standard specifies a
a) Techniques for start – stop data
b) Technique for dial access
c) DTE/DCE interface
d) Data bit rate
e) None of The Above

8. Which of the following communication modes support two – way traffic but in only one direction at a time?
a) Simplex
b) Half – duplex
c) Three – Quarters duplex
d) Full of The Above
e) None of The Above

9. Which of the following might be used by a company to satisfy its growing communications needs?
a) Front end processor
b) Multiplexer
c) Controller
d) Concentrator
e) All of The Above

10. What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?
a) 4
b) 2
c) 6
d) 3
e) None of The Above

11. The interactive transmission of data within a time sharing system may be best suited to:
a) Simplex lines
b) Half duplex lines
c) Full duplex lines
d) Biflex line
e) None of The Above

12. Which of the following statement is incorrect?
a) The difference between synchronous and asynchronous transmission is the clocking derived from the data in synchronous transmission
b) Half duplex line is a communication line in which data can move in two directions, but not at the same time
c) Teleprocessing combines telecommunications and DP techniques in online activities
d) Batch processing is the preferred processing mode for telecommunication operations
e) None of The Above

13. Which of the following is considered a broad band communication channel?
a) Coaxial code
b) Fiber optic cable
c) Microwave circuits
d) Satellite systems
e) All of The Above

14. Which of the following is not a transmission medium?
a) Telephone lines
b) Coaxial cable
c) Modem
d) Microwave systems
e) Satellite systems

15. Which of the following does not allow multiple uses or devices to share one communication line?
a) Doubleplexer
b) Multiplexer
c) Concentrator
d) Controller
e) None of The Above

16. Which of the following signals is not standard RS – 232 – C signal?
a) VDR
b) RTS
c) CTS
d) DSR
e) None of The Above

17. Which of the following statement is incorrect?
a) Multiplexes are designed to accept data from several I/O devices and transmit a unified stream of data on one communication line
b) HDLC is a standard synchronous communication protocol
c) RTS/CTS is the way the DTE indicates that it is ready to transmit data and the way the DCW indicates that it is ready to accept data
d) RTS/CTS is the way the terminal indicating ringing
e) None of The Above

18. Which of the following is an advantage to using fiber optics data transmission?
a) Resistance to data theft
b) Fast data transmission rate
c) Low noise level
d) Few transmission errors
e) All of The Above

19. Which of the following is required to communicate between two computers?
a) Communications Software
b) Protocol
c) Communication Hardware
d) Access to transmission medium
e) All of The Above

20. The transmission signal coding method of TI carrier is called:
a) Bipolar
b) NRZ
c) Manchester
d) Binary
e) None of The Above

21. Which data communication method is used to transmit the data over a serial communication link:
a) Simplex
b) Half – Duplex
c) Full Duplex
d) (b) and (c)
e) None of The Above

22. What is the minimum number of wires needed to send data over a serial communication link layer?
a) 1
b) 2
c) 4
d) 6
e) None of The Above

23. Which of the following types of channels moves data relatively slowly?
a) Wide band channel
b) Voice band channel
c) Narrow band channel
d) Broadband channel
e) None of The Above

24. Most data communications involving telegraph lines use:
a) Simplex lines
b) Wideband Channels
c) Narrowband Channels
d) Dialed Service
e) None of The Above

25. A communication device that combines transmissions from several I/O devices into one line is a:
a) Concentrator
b) Modifier
c) Multiplexer
d) Full – Duplex Line
e) None of The Above

26. How much power (roughly) a light emitting diode can couple into an optical fiber?
a) 100 microwatts
b) 440 microwatts
c) 100 picowatts
d) 10 miliwatts
e) None of The Above

27. The synchronous modems are more costly than the asynchronous modems because:
a) They produce large volume of data
b) They contain clock recovery circuits
c) They transmit the data with stop and start bits
d) They operate with a larger band width
e) None of The Above

28. Which of the following statement is correct?
a) Terminal section of a synchronous modem contains the scrambler
b) Receiver section of a synchronous modem contains the scrambler
c) Transmission section of a synchronous modem contains the scrambler d) All of The Above
e) None of The Above

29. In a synchronous modem, the digital – to – analog converter transmits signal to the
a) Equalizer
b) Modulator
c) Demodulator d) Terminal
e) None of The Above

30. Which of the following communications lines is best suited to interactive processing applications?
a) Narrow band channels
b) Simplex lines
c) Full duplex lines
d) Mixed band channels
e) None of The Above

31. A remote batch – processing operation in which data is solely input to a central computer would require:
a) Telegraph Line
b) Simplex Lines
c) Mixed Band Channel
d) All of The Above
e) None of The Above

32. A band is always equivalent to:
a) A byte
b) A bit
c) 100 bits
d) 16 bits
e) None of The Above

33. The loss in signal power as light travels down the fiber is called:
a) Attenuation
b) Propagation
c) Scattering
d) Interruption
e) None of The Above

34. Avalanche photodiode receivers can detect bits of transmitted data by receiving:
a) 100 photons
b) 200 photons
c) 300 photons
d) 400 photons
e) None of The Above

35. Communication circuits that transmit data in both directions but not at the same time are operating in:
a) A simple mode
b) A half – duplex mode
c) A full – duplex mode
d) An asynchronous mode
e) None of The Above

36. An example of a medium – speed, switched communications services is:
a) Series 1000
b) Data phone 50
c) DDD
d) All of The Above
e) None of The Above

37. In communication satellite, multiple repeaters are known as:
a) Detector
b) Modulator
c) Stations
d) Transponders
e) None of The Above

38. While transmitting odd – parity coded symbols, the number of zeros in each symbol is:
a) Odd
b) Even
c) Both (a) and (b)
d) Unknown
e) None of The Above

39. Data communications monitors available on the software marked include:
a) ENVIRON/1
b) BPL
c) TOTAL
d) TELNET
e) None of The Above

40. An example of an analog communication method is: a) Laser beam
b) Microwave
c) Voice grade telephone line
d) All of The Above
e) None of The Above

41. Number of bits per symbol used in Baudot code is:
a) 7
b) 5
c) 8
d) 9
e) None of The Above

42. What is the main difference between DDCMP and SDLC?
a) DDCMP does not need special hardware to final the beginning of a message 
b) DDCMP has a message header
c) SDLC has a IP address 
d) SDLC does not use CRC 
e) None of The Above

43. An example of digital, rather than analog, communication is:
a) DDD
b) DDS
c) WATS
d) DDT
e) None of The Above

44. Terminals are required for:
a) Real time, batch processing & time sharing
b) Real time, time sharing and distributed processing
c) Real time, distributed processing and manager inquiry
d) Real time, time sharing and message switching
e) None of The Above

45. The receive equalizer reduces delay distortions using a:
a) Tapped delay lines
b) Gearshift
c) Descrambler
d) Difference Engine
e) None of The Above

46. In a synchronous modem, the receive equalizer is known as:
a) Adaptive equalizer
b) Impairment equalizer
c) Statistical equalizer
d) Compromise equalizer
e) None of The Above

47. The channel in the data communication model can be:
a) Postal mail services
b) Telephone lines
c) Radio lines
d) Any of The Above
e) None of The Above

48. A data terminal serves as a(n):
a) Effector
b) Sensor
c) Both (a) and (b)
d) Neither (a) nor (b)
e) None of The Above

49. Which of the following transmission systems provides the highest data rate to in individual device:
a) Computer Bus
b) Telephone Lines
c) Voice and Mode
d) Leased Lines
e) None of The Above

50. A protocol is a set of rules governing a time sequence of events that must take place
a) Between peers
b) Between modems
c) Between an interface
d) Across an interface
e) None of The Above


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