Graphics

Question 1
A graphics card has on board memory of 1MB. Which of the following modes can the card not support?
A
1600 × 400 resolution with 256 colours on a 17 inch monitor
B
1600 × 400 resolution with 16 million colours on a 14 inch monitor
C
800 × 400 resolution with 16 million colours on a 17 inch monitor
D
800 × 800 resolution with 256 colours on a 14 inch monitor
       Operating-Systems       Graphics       Gate-2000
Question 1 Explanation: 
For every option we need to calculate memory.
Option A:
1600×400 = 64000 = 640 KB
256 colours 8 bits = 1 Byte
⇒ 640×1 = 640KB (we have 1MB)
Option B:
1600×400 = 640KB
16 million = 24 bits = 3 bytes
⇒ 640×3 = 1920KB (Not enough)
Option C:
800×400 = 320 KB
16 millions = 3 bytes ⇒ 320×3 = 960 KB (we have 1MB)
Option D:
800×400 = 320 KB
256 colours = 1 Byte ⇒ 320×1 = 320 (we have 1MB)
There is 1 question to complete.