Answers
Question No.1 (Marks = 10)
a) How many combinations of bits are exist when we make a truth table of 9 inputs?
2n are the total combinations of bits in Truth table, where n is number of variables, so
29=512
512 bits will there
b) Prepare a truth table for the following I = (w + x) Å (y . z) where w, x, y and z are four binary inputs in the truth table.
Note :(Å symbol represent XOR gate)
Solution:
Remember in XOR, output will high only if only all inputs are mismatch to each others.
| Inputs | | | Output | |||
| W | X | Y | Z | w+x | y.z | (w + x) Å (y . z) |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 1 | 0 | 1 | 1 |
| 0 | 1 | 0 | 0 | 1 | 0 | 1 |
| 0 | 1 | 0 | 1 | 1 | 0 | 1 |
| 0 | 1 | 1 | 0 | 1 | 0 | 1 |
| 0 | 1 | 1 | 1 | 1 | 1 | 0 |
| 1 | 0 | 0 | 0 | 1 | 0 | 1 |
| 1 | 0 | 0 | 1 | 1 | 0 | 1 |
| 1 | 0 | 1 | 0 | 1 | 0 | 1 |
| 1 | 0 | 1 | 1 | 1 | 1 | 0 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 0 | 1 | 1 | 0 | 1 |
| 1 | 1 | 1 | 0 | 1 | 0 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 0 |
Question No.2 Write any three features and two limitations of each one in the given format
Features: (3 Marks)
Sr.No. Word Processor Spread Sheet
1. Good Formatting Hand with Good Mathematical Hand
Integrate technology
2. Real word 2d drawing Good Drawing, Flow chart
Features of Spell and Grammatical error and charts.
checking
3. Direct mail attachment and Data recovery Options Data recovery, AutoSave and
And much more much more
Limitations:
Sr.No. Word Processor Spread Sheet
1. Calculation of Functions and relationship Limited Format styles w.r.t
MS word
Up gradation is very costly.
2 3D drawing not sported. Animations and special
Effects not present
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