IGCSE Computer Science Paper-1: Specimen Questions with Answers 160 - 163 of 164

Question 160

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Write in Short

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

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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

Choice (4)
a.X
b.X or Y
c.Y
d.X + Y

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

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Write in Short

Write a pseudocode for determining the water temperature Program.

Explanation

Input fahrenheit

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

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Appeared in Year: 2013

Write in Short

Write the truth table for the Digital Logic Gate shown below:

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