IGCSE Computer Science Paper-1: Specimen Questions with Answers 160 - 163 of 164
Question 160
Write in Short
Short Answer▾List one advantage and one disadvantage of using internet for shopping purpose.
Explanation
It becomes easy to compare prices of different products while using internet for shopping purpose.
While using internet for shopping purpose we come across several bogus, unfriendly and complicated websites that may cheat us by delivering a product which may be faulty or of a damaged quality.
Question 161
Question
MCQ▾The truth table below represents which of this Boolean function?
| X | Y | f (X, Y) |
| 0 | 0 | 0 |
| 0 | 1 | 0 |
| 1 | 0 | 1 |
| 1 | 1 | 1 |
Choices
| Choice (4) | |
|---|---|
| a. | X |
| b. | X or Y |
| c. | Y |
| d. | X + Y |
Answer
a.Explanation
From the above truth table it is very much clear that the value of f (X, Y) is same as X for all input pairs.
Therefore f (x, y) =x
Question 162
Explanation
Input fahrenheit
centigrade= (fahrenheit-32) * (5/9)
If centigrade < = 0 then
Output “Water Frozen”
Else if Centigrade > =100 then
Output “Water Boiling”
Else
Output “Water is neither frozen nor boiling”
Endif
Question 163
Appeared in Year: 2013
Write in Short
Short Answer▾Write the truth table for the Digital Logic Gate shown below:
The Digital Logic Gate
Explanation
The figure above shows the NAND Gate. A NAND Gate has two or more input signals but only one output signal.
Truth Table
| Inputs | Output | |
| A | B | |
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |