Computer MCQS

171. Consider the main body of a C++ program,

string var1 = “Computer “;
string var2 = “Science”;
string var3 = var1 + var2;
cout << var3 << endl;

If the program is run, what will be displayed on the screen?
(A) var3
(B) Computer
(C) Science
D: Computer Science

171. The transmission of data within a time-sharing system may be most excellent suited to:
A: Simplex lines
B: Half-duplex lines
C: Full duplex lines
D: None of the above

172. Which of the following is an incorrect statement?
A: The difference between synchronous and asynchronous transmission is the clocking concept.
B: Half duplex line is a communication line in which data can move in both directions, however not at the same time.
C: Teleprocessing combines telecommunications and DSP techniques.
D: Batch processing is the ideal processing mode for telecommunication operation.

173. Which of the following channels is a broadband communication channel?
A: Coaxial cable
B: Twisted pair cable
C: Microwave circuits
D: All of the above

174. All of the following are transmission mediums without?
A: Telephone Lines
B: DSL cables
C: Mouse
D: Microwave systems

175. Which of the following does not permit various devices to contribute to one communication line?
A: Doubleplexer
B: Multiplexer
C: Concentrator
D: Adder

176. Which of the following is not an RS-232-C signal?
A: VDR
B: RTS
C: CTS
D: DSR

177. Which of the following is not a correct statement?
A: Multiplexers are planned to allow data from several I/O devices and broadcast a unified stream of data on one communication line.
B: The network layer is the second layer of the OSI model.
C: RTS/CTS is the way DTE indicates that it is ready to transmit data and the way the DCW.
D: RTS/CTS is the way the workstation indicates ringing.

178. Which of the following is an advantage of using fiber optics medium in data transmission?
A: Resistance to theft
B: Fast transmission
C: Low noise
D: All of the above

179. Which of the following is necessary to communicate between two computers?
A: Communications software
B: Protocol
C: Communication hardware
D: All of the above

180. The coding method of TI carrier is called:
A: Bipolar
B: NRZ-L
C: Manchester
D: NRZ-I