Computer MCQS

361. What are the names of the two basic types of plotters?
A: Light pen and drum
B: Pen and drum
C: Flat and bed
D: Flatbed and drum

362. Data can be stored on CDs by which mechanism?
A: Magnetizing
B: Thermal energy
C: Punctures and depressions
D: None of the above

363. Fiber optics possess the following properties:
A: Immune electromagnetic interference
B: Very less signal attenuation
C: Very hard to tap
D: All of the mentioned

364. If an optical carrier is represented as OC-n, generally the link speed equals (in Mbps).
A: n39.8 B: n51.8
C: 2n*51.8
D: None of the mentioned

365. Terrestrial radio channels are broadly classified into _ groups:
A: 2
B: 3
C: 4
D: 1

366. Radio channels are an appealing medium because:
A: Can penetrate walls
B: Mobile users can be provided with connectivity.
C: Can carry signals for a long distance
D: All of the mentioned

367. Geostationary satellites:
A: Are fixedly positioned above the earth
B: Rotate the earth about a single point.
C: Pivot the earth about a changing hub
D: All of the mentioned

368. The sharing of a medium and its connection by at least two devices is called:
A: Fully duplexing
B: Multiplexing
C: Both A and B
D: None of the mentioned

369. Multiplexing is used in _:
A: Packet switching
B: Circuit switching
C: Data switching
D: None of the mentioned

370. Which multiplexing technique transmits digital signals?
A: FDM
B: TDM
C: WDM
D: None of the mentioned