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Free computer quiz Online Test - MeritNotes
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Online Exam
No. of Questions :10
Remaining Time :
1. Buffering is
(a)
A method to reduce the routing overhead
(b)
A method to reduce cross talks
(c)
The process of temporarily storing the data to allow for small variation in device speeds
(d)
Storage of data within the transmitting medium until the receiver is ready to receive
2. Teleprinters
(a)
Are same as teletypes
(b)
Are used for printing at remote locations, not for input
(c)
Offer both high speed operation and a variety of formatting controls
(d)
Have a printer for output and a keyboard for input
3. What is the main difference between synchronous and a synchronous transmission?
(a)
Clocking is derived from the data in synchronous transmission
(b)
Clocking is mixed with data in asynchronous transmission
(c)
Pulse height is different
(d)
Bandwidth required is different
4. When amplitude of pulses is varied to represent analog information, the method is called
(a)
PAM
(b)
PCM
(c)
PPM
(d)
PWM
5. Which data communication method is used to send data over a serial communication link?
(a)
Full duplex
(b)
Half duplex
(c)
Simplex
(d)
All of these
6. International bipolar violations
(a)
Occur only in the laboratory
(b)
Result in successive marks having opposite polarities
(c)
Are used to convey information or maintain a minimum number of ones on a digital line
(d)
Represent coding errors caused by the impairments
7. The interactive transmission of data within a time sharing system may be best suited to
(a)
Biflex lines
(b)
Simplex lines
(c)
Half duplex lines
(d)
Full duplex lines
8. Satellite transponders
(a)
Are devices that echos the radiation without change from one point on earth to another
(b)
Use a single frequency for reception and transmission from one point on earth to another
(c)
Use lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations
(d)
Use a higher frequency for reception of radiation from earth stations and lower frequency for transmission to earth stations
9. Digital cellular radio systems
(a)
Allow multiple subscribers to share the use of a common channel within a cell
(b)
Allow multiple subscribers to share the use of cells
(c)
Expand number of cells
(d)
Extend transmission distance of subscribers within a cell
10. A bipolar violation
(a)
Represents a one bit followed by a zero bit
(b)
Occurs when two successive pulses have the same polarity and are separated by a one level
(c)
Occurs when two successive pulses have the same polarity and are separated by a zero level
(d)
Represents a zero bit followed by one bit
