GATE - 2000 | OS | A graphics card has on board memory of 1MB. Which of the following

GATE - 2000 | OS | A graphics card has on board memory of 1MB. Which of the following
Posted on 26-02-2022

GATE - 2000 [Operating System]

Questions:

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

Solution:

Option (B) is Correct.

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)

 

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