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CBSE AISSCE 2016-2017 Marking Scheme for Computer Science
(Sub Code: 083 Paper Code 91/1 Delhi)

OR
F(U,V,W)=∑(0,2,3,6)

(1 Mark for correctly writing the SOP form)
OR
(½ Mark for any two correct terms)
Note: Deduct ½ mark if wrong variable names are written in the expression

(d) Reduce the following Boolean Expression to its simplest form using K-Map: 3
F(X,Y,Z,W)= (0,1,2,3,4,5,10,11,14)Σ

Ans

OR

F(X,Y,Z,W)= X’Z’ + Y’Z + XZW’

(½ Mark for drawing K-Map with correct variable names)
(½ Mark for correctly plotting 1s in the given cells)
( ½ Mark each for 3 groupings)
( ½ Mark for writing final expression in reduced/minimal form)
Note:
● Deduct ½ mark if wrong variable names are used
● Deduct ½ mark for any redundant group appearing in final
expression

7 (a) Differentiate between Radio Link and Microwave in context of wireless 2
communication technologies.

Ans Radio Link: Data is transmitted outward from the antenna through free space in
all directions. It is a Slow means of communication;

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