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WorksheetsData Tran
Total questions: 9
Worksheet time: 23mins
Name
Class
Date
1.
It is the transmission of data from one place to another.
a)
True
b)
False
c)
None
d)
Both
2.
A data communication system is made up from hardware, software and communications facilities
a)
True
b)
False
c)
Both
d)
None
3.
Data transfer interface could be...
a)
Parallel and perpendicular
b)
Parallel and serial
c)
Serial and Continuos
d)
Serial parallel and continuous
4.
This picture represent...
a)
Parallel communication
b)
Serial communication
5.
In Data communication FEC is known as
a)
FRQEUENCY ERROR CORRECTION
b)
FORWARD ERROR CO-RELATION
c)
FORWARD ERROR CORRECTION
d)
FRQEUENCY ERROR CO-RELATION
6.
The hamming code is an error correcting code used for correcting ---------
a)
Environmental errors
b)
Human errors
c)
Coupling errors
d)
transmission errors
7.
The number of Hamming bits is determined by the following expression.
a)
2^n≥m+n+2
b)
2^n≥m+n+1
c)
2^n=m+n+1
d)
2^n≥m-n+1
8.
In Hamming bits 'n' is-----
a)
number of Hamming bits
b)
number of bits in each data character.
c)
number of data bits
d)
None of the above
9.
There are two basic types of error messages -------
a)
lost messages and damaged message.
b)
retrieved messages and reset messages
c)
Long messages and Lateral Messages
d)
None of the above
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