Graphics
Question 1 |
A graphics card has on board memory of 1MB. Which of the following modes can the card not support?
1600 × 400 resolution with 256 colours on a 17 inch monitor | |
1600 × 400 resolution with 16 million colours on a 14 inch monitor | |
800 × 400 resolution with 16 million colours on a 17 inch monitor | |
800 × 800 resolution with 256 colours on a 14 inch monitor |
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)
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)
Question 2 |
A graphic display system has a frame buffer that is 640 pixels wide, 480 pixels high and 1 bit of color depth. If the access time for each pixel on the average is 200 nanoseconds, then the refresh rate of this frame buffer is approximately :
16 frames per second | |
19 frames per second | |
21 frames per second | |
23 frames per second |
Question 2 Explanation:
Given data,
- Width (or) wide =640 pixels
- Height (or) High =480 pixels
- Color depth =1 bit/pixel
- Access time of each pixel on the average =200ns
- Refresh rate of frame buffer=?
Step-1: Graphic display system =640*480
=307200
Step-2: Memory required for Graphic display system =640*480*1 =307200
Step-3: Total screen access time = Memory required for Graphic display system * Access time of each pixel
= 307200*200 ns
= 61440000 ns
Step-4: Refresh rate of frame buffer per second=(10 -9 )/61440000
= 16.27604166 frames per second
[ Note: 10 -9 =1000000000 ]
- Width (or) wide =640 pixels
- Height (or) High =480 pixels
- Color depth =1 bit/pixel
- Access time of each pixel on the average =200ns
- Refresh rate of frame buffer=?
Step-1: Graphic display system =640*480
=307200
Step-2: Memory required for Graphic display system =640*480*1 =307200
Step-3: Total screen access time = Memory required for Graphic display system * Access time of each pixel
= 307200*200 ns
= 61440000 ns
Step-4: Refresh rate of frame buffer per second=(10 -9 )/61440000
= 16.27604166 frames per second
[ Note: 10 -9 =1000000000 ]
There are 2 questions to complete.