Q.1. What is the minimum number of wires needed to send data over a serial communication link layer ?
(1) 1 (2) 2 (3) 3 (4) 4 (5) 5
Q.2. Which data communication method is used to send data over a serial communication link?
(1) Simplex (2) Half duplex (3) Full duplex (4) All of these (5) None of these
Q.3. Which of the following statements is incorrect?
(1) Teleprocessing combines telecommunications and DP techniques in online activities.
(2) Multiplexers are designed to accept data from several I/O devices and transmit a unified stream of data on one communication line.
(3) Half-duplex line is a communication line in which data can move in two directions, but not the same time.
(4) Batch processing is the preferred processing mode for telecommunication operations.
(5) None of these
Q.4. The interactive transmission of data within a time sharing system may be best suited to
(1) simplex lines (2) half-duplex lines (3) full-duplex lines (4) biflex lines (5) Both 2 and 3
Q.5. Teleprinters
(1) are used for printing at remote locations, not for input
(2) offer both high speed operation and a variety of formatting controls
(3) have a printer for output and a keyboard for input
(4) are same as teletypes
(5) Both 3 & 4
Q.6. Which of the following is an example of a bounded medium?
(1) Coaxial cable (2) Waveguide
(3) Fibre optic cable (4) All of these
(5) None of these
Q.7. Coaxial cable has conductors with
(1) a common axis (2) equal resistance (3) the same diameter (4) All (5) None of these
Q.8. The area of coverage of a satellite radio beam is called its-
(1) beamwidth (2) circular polarization (3) footprint (4) identity (5) Wavelength
Q.9. The amount of uncertainty in a system of symbol is called
(1) bandwidth (2) entropy (3) loss (4) quantum (5) Scattering
Q.10. Buffering is
(1) the process of temporarily storing the data to ° allow for small variation in device speeds
(2) a method to reduce cross-talks
(3) storage of data within the transmit-ting medium until the receiver is ready to receive
(4) a method to reduce the routing overhead
(5) both 2 & 3
Answers
Q.1.(2) 2
Q.2.(3) Full duplex
Q.3.(4) Batch processing is the preferred processing made.
Q.4.(2) Half duplex
Q.5.(3) Printer for output & keyboard for input.
Q.6.(4) All
Q.7.(1) a common axis
Q.8.(3) footprint
Q.9.(2) Entropy
Q.10.(1) The process of temporarily storing the data
